It’s been a while since my last entry and I have to say with good reason. It was a busy end to spring with days of rain giving way to record high temperatures. Not to mention the endless high humidity. What didn’t break in June and July seems to be holding up in August allowing our service technicians a chance to catch up on some much need rest. Modern’s service technicians have averaged 150 hours overtime with some as high as 300 hours. I felt a little odd thinking about writing my midnight blogs while they were still out working. Before we get back into the normal busy of our next season and hopefully the return to regular entries I would like to take this opportunity to thank them and their family.
First and foremost I’d like to thank the service technicians that make ModernControls a great company to do business with and a great place to work. The quality of the people that I work with is amazing. How they managed to keep going in such adverse conditions day after day with such a good attitude is a true measure of their character. When it’s a 100°F outside and your air conditioner isn’t working it is hard not to be impatient for your unit to get fixed. Most people never stop to think about what the guy on the roof is dealing with. His reward for getting you going is another dead unit to fix, usually one right after another until dark. That is if he’s fortunate enough not to be on call that night. Our customers have been very considerate and I’m sure very thankful. I just can’t imagine that’s of much conciliation to what they endured. I am truly proud of everyone.
Second and equally important is the families of the technicians. The wives who worry about their husbands driving home late at night after such exhausting days. Knowing their loved ones are far from home, in stressful situations, and with little time for communication with their family. The young children who only know Dad’s not home and the rest of the family that seems out of sorts because someone’s missing. It’s truly a sacrifice and on behalf of ModernControls I’d like to thank you.
Next I’d like to thank the rest of the staff at Modern for falling into the support role. When the technicians needed help everyone was there for them. Lending a hand isn’t easy when everyone has more to do because of the extreme weather but they did it. Making a call, picking something up, dropping something off or just checking in to make sure everything is OK.
On the worst weekend night of the summer we went from two technicians out working to ten in an hour. Two more were standing by willing to help and actually volunteered to be on call for the rest of the night to give the on call tech’s a break. One technician went to a site to help another technician complete a repair so he could get home a little sooner and a little safer.
ModernControls has had so many great accomplishments over the years; none have made me prouder than the service technicians this summer.
Monday, August 9, 2010
Monday, May 31, 2010
ASHRAE Standard 90.1
My intention is to familiarize people like me who are just starting to acquire knowledge about the ASHRAE Standard 90.1. Most of these items are done as part of the Plan & Spec and Design Build process; now they’re requirements. I strongly recommend that everyone in the HVAC Industry goes on the ASHRAE web site http://www.ashrae.org/technology/page/548 and clicks on the link for Standard 90.1. When the book opens click on the “page” button at the bottom and go to page 30. Page 30 through 55 deals with the mechanical systems minimum standards. The information is well organized and points us in the right direction for operating cost reduction strategies. If you’re a property owner, manager or facility engineer this is a small glimpse into big changes coming your way. Standard 90.1 mainly specifies building construction that will reduce the energy consumption of the mechanical systems.
6.1) this section spells out the general guidelines for compliance of new buildings, additions to an existing building, (unless the addition is served by existing systems) and alterations to existing systems. Direct replacement equipment and components including HVAC, A/C, economizer, duct and piping shall comply with sections 6.2 through 6.8. Exceptions found in section 6.1 include alterations that will not increase power consumption and replacement or alterations that require extensive revisions. Changing refrigerants, relocation of existing equipment or where there is insufficient space for modifications to duct and pipe are also exempt.
6.2) this section is used to determine if compliance is required for a project. This section offers two options moving forward, one is the simplified approach which will follow section 6.3. Section 6.3 would be the option of choice for upgrades and direct unit replacements for small existing buildings. The other is to follow section 6.4 which offers more options. 6.4 would be the option of choice for new construction or additions to the existing building.
6.3) this section begins with building specifics which are one and two story buildings with less than 25,000 ft². Each system must meet all the criteria. Basically a split system or package unit with a heat section and a DX cooling that is either an air cooled condenser or evaporative condensers that complies with section 6.8. The units will need an economizer and barometric relief that both comply with section 6.4. The equipment will need the controls specified in section 6.5. Basically to take the simplified approach you need meet the requirements of section 6.3, 6.5 and 6.8. There are 15 specific criteria in section 6.3 that need to be met as well as table 6.3.2 that can be used to minimize or eliminate the economizer. If all aspects of the building and equipment are met you can go straight to section 6.7 which is the submittal process. If all the criteria are not met you must follow the guidelines in section 6.4.
6.4) this section gives the system selection engineer or salesperson direction as to what rules apply to the proposed system. This section would be best described as the basis for design and equipment selection, if you have equipment type X; then you must meet conditions A, B, and C. It would work well as a question and answers program in a load calculation/equipment selection software package. This is the must read section of the standard 90.1 for everyone in the HVAC industry. It is 4 pages of material that will be used to ensure that the project will meet code in the near future.
6.5) this section details the specifications for heating/cooling changeover, economizer operation and building systems integration. The requirements that need to be met are VFD settings and minimums for fan motors and hydronic pumps. Others include the changeover deadband set points and decreased airflow set points. Section 6.5 also deals with the specific operation and set points of the system during heating, cooling, and dehumidification. It establishes the guidelines for exhaust air energy recovery, kitchen exhaust, and fume hood exhaust.
6.7) this section organizes the documentation requirements for the project submittals. The intention here is to make sure everyone associated with the project gets the documents that show that the mechanical requirements are met. Most of these are standard items that are commonly requested. The expanded information will now include listing a service provider, preventive maintenance schedules, and certified building commissioning.
6.8) this is the last mechanical equipment section and it’s the tables that organize the minimum efficiency requirements, standard ratings and operating conditions. It is clearly laid out and easy to follow by system type. For new equipment installations it will be easy since the equipment manufactures’ will be required to meet the minimum standards. For upgrade and modification work it will be a matter of documenting the existing equipment.
6.1) this section spells out the general guidelines for compliance of new buildings, additions to an existing building, (unless the addition is served by existing systems) and alterations to existing systems. Direct replacement equipment and components including HVAC, A/C, economizer, duct and piping shall comply with sections 6.2 through 6.8. Exceptions found in section 6.1 include alterations that will not increase power consumption and replacement or alterations that require extensive revisions. Changing refrigerants, relocation of existing equipment or where there is insufficient space for modifications to duct and pipe are also exempt.
6.2) this section is used to determine if compliance is required for a project. This section offers two options moving forward, one is the simplified approach which will follow section 6.3. Section 6.3 would be the option of choice for upgrades and direct unit replacements for small existing buildings. The other is to follow section 6.4 which offers more options. 6.4 would be the option of choice for new construction or additions to the existing building.
6.3) this section begins with building specifics which are one and two story buildings with less than 25,000 ft². Each system must meet all the criteria. Basically a split system or package unit with a heat section and a DX cooling that is either an air cooled condenser or evaporative condensers that complies with section 6.8. The units will need an economizer and barometric relief that both comply with section 6.4. The equipment will need the controls specified in section 6.5. Basically to take the simplified approach you need meet the requirements of section 6.3, 6.5 and 6.8. There are 15 specific criteria in section 6.3 that need to be met as well as table 6.3.2 that can be used to minimize or eliminate the economizer. If all aspects of the building and equipment are met you can go straight to section 6.7 which is the submittal process. If all the criteria are not met you must follow the guidelines in section 6.4.
6.4) this section gives the system selection engineer or salesperson direction as to what rules apply to the proposed system. This section would be best described as the basis for design and equipment selection, if you have equipment type X; then you must meet conditions A, B, and C. It would work well as a question and answers program in a load calculation/equipment selection software package. This is the must read section of the standard 90.1 for everyone in the HVAC industry. It is 4 pages of material that will be used to ensure that the project will meet code in the near future.
6.5) this section details the specifications for heating/cooling changeover, economizer operation and building systems integration. The requirements that need to be met are VFD settings and minimums for fan motors and hydronic pumps. Others include the changeover deadband set points and decreased airflow set points. Section 6.5 also deals with the specific operation and set points of the system during heating, cooling, and dehumidification. It establishes the guidelines for exhaust air energy recovery, kitchen exhaust, and fume hood exhaust.
6.7) this section organizes the documentation requirements for the project submittals. The intention here is to make sure everyone associated with the project gets the documents that show that the mechanical requirements are met. Most of these are standard items that are commonly requested. The expanded information will now include listing a service provider, preventive maintenance schedules, and certified building commissioning.
6.8) this is the last mechanical equipment section and it’s the tables that organize the minimum efficiency requirements, standard ratings and operating conditions. It is clearly laid out and easy to follow by system type. For new equipment installations it will be easy since the equipment manufactures’ will be required to meet the minimum standards. For upgrade and modification work it will be a matter of documenting the existing equipment.
Sunday, March 28, 2010
A Word of Caution;
A few weeks ago I wrote how inverter duty, variable flow systems are sure to change industry. There is an ASHRAE standard to show how low the operating cost is compared to other types of systems. We are seeing an increase in the number of these systems specified by engineers and installed by mechanical contractors. What remains to be seen is adequate installation support, adequate start-up support and the resolution of service problems. I’d like to detail a few of my experiences to help convey my concern with the installation of variable refrigerant flow systems.
1) Job # 1 – a service customer came to us looking for help with a system that was installed by a reputable area contractor. The warranty had expired and contractor was no longer willing to service the system that had never functioned properly. The system was specified by an engineer and installed with the construction of an addition. ModernControls contacted the manufacture and talked to the same factory technical support person that helped the last contractor. The manufacture sent us many parts over the course of the next few months in an attempt to resolve the issue. None of which worked. The customer however having to pay all the labor was not happy. Then the technical support person stopped returning calls. I spoke to other factory representatives; all said they would have to speak to the original guy because he was in charge of the department. No one ever called back. When my customer got frustrated I turned over all the information, including dates and names of who I had spoken to. He got the same lack of response. There were 2 systems installed to service the same area, he shut down the system that never worked and has been dealing with inadequate heating and cooling on degree days since day one.
2) Job # 2 – a mechanical contractor was installing three variable refrigerant flow systems in a large building renovation project. ModernControls was the control contractor for the project and our scope of work was to integrate the three systems with the Johnson Controls building automation system. This part of the project went well. The local sales representative asked ModernControls to perform start-up of the systems. The representative said that they would give us full support so we could get familiar with their product and the hope was that we’d sell them to our customers. It took twice as long to perform start-up as they said it would, the contractor made piping mistakes that needed to be sorted out and then corrected. The instructions have the pictures together in one spot and then you find the corresponding instructions in your language in another part. After following the series of instructions and seeing the mistakes that were made it was pretty easy to see how things went wrong. That however was not the only problem. The manufacture representative told us that he would have one of his “start-up guys” meet our technician on the job the first day. What we got was a call 3 hours after we arrived from a technician who had “been around a few” but really wasn’t that familiar so he didn’t come out. Two days later we came up with the right way to do things, a third day was spent on site to pass the information on to the actual installer so he could make the changes. Fortunately on start-up everything appeared to work correctly, had it not we would have spent more time scratching our head because the product sales representative didn’t have expertise to help us with start-up let alone troubleshooting problems.
3) Job # 3 – Which will take us back to Job # 1 briefly. The sales representative for the product from job # 1 showed up in my office with sales literature. I refused to take it and told him about my experience with the product. He said he could get me factory assistance to help correct Job # 1 which is now almost 3 years old resolved. I told him I would talk to the customer but informed him that he has requested prices to remove both systems from their site. If the factory would assume the responsibility for all cost we could approach the subject with the customer. The following day, like on queue a job turned up with the same product. One of my service customers had a renovation project completed with a large variable flow system. The call I received was like this “the customer had a service call for a new unit in the fitness area that need to be reset every time they used the room since start-up. They wanted us to take care of the problem now that the warranty was over.” I assumed it was a single cassette ductless split. When the tech called and told me what he was looking at and that he need technical support I passed on the product representative’s name as someone to call for support. The next morning I came in to find our parts person putting together a 500 page booklet that had been e-mailed to the technician. Their idea of technical support was a 500 page book. When I called to ask the product representative if that was his idea of good product support he told me that “the guy” wasn’t available for 3-weeks and if I sent my technicians (22 mind you) away for a 3-day class they would know how to work on the system without help. The technician that was on site has over 20 years of commercial and industrial HVAC experience.
I am sure that there is a leaning curb associated with every new technology but this one seems like it’s going to cause a lot of discomfort. Back in February I expressed my opinion that the package units with the inverter duty compressors would help us gain a better understanding of how these systems operate and what to expect under different conditions. This is one service aspect that we need to address so that we can train technicians on the common functions of the different manufactures’ systems. The next thing is how to install the systems in such a way as to allow malfunctioning systems to remain on line while making repairs. A simple refrigerant leak or failed metering device can take an entire system down for repairs. The installation of valves and access fittings, plus keeping all piping accessible can suddenly make the installation not so cost effective.
1) Job # 1 – a service customer came to us looking for help with a system that was installed by a reputable area contractor. The warranty had expired and contractor was no longer willing to service the system that had never functioned properly. The system was specified by an engineer and installed with the construction of an addition. ModernControls contacted the manufacture and talked to the same factory technical support person that helped the last contractor. The manufacture sent us many parts over the course of the next few months in an attempt to resolve the issue. None of which worked. The customer however having to pay all the labor was not happy. Then the technical support person stopped returning calls. I spoke to other factory representatives; all said they would have to speak to the original guy because he was in charge of the department. No one ever called back. When my customer got frustrated I turned over all the information, including dates and names of who I had spoken to. He got the same lack of response. There were 2 systems installed to service the same area, he shut down the system that never worked and has been dealing with inadequate heating and cooling on degree days since day one.
2) Job # 2 – a mechanical contractor was installing three variable refrigerant flow systems in a large building renovation project. ModernControls was the control contractor for the project and our scope of work was to integrate the three systems with the Johnson Controls building automation system. This part of the project went well. The local sales representative asked ModernControls to perform start-up of the systems. The representative said that they would give us full support so we could get familiar with their product and the hope was that we’d sell them to our customers. It took twice as long to perform start-up as they said it would, the contractor made piping mistakes that needed to be sorted out and then corrected. The instructions have the pictures together in one spot and then you find the corresponding instructions in your language in another part. After following the series of instructions and seeing the mistakes that were made it was pretty easy to see how things went wrong. That however was not the only problem. The manufacture representative told us that he would have one of his “start-up guys” meet our technician on the job the first day. What we got was a call 3 hours after we arrived from a technician who had “been around a few” but really wasn’t that familiar so he didn’t come out. Two days later we came up with the right way to do things, a third day was spent on site to pass the information on to the actual installer so he could make the changes. Fortunately on start-up everything appeared to work correctly, had it not we would have spent more time scratching our head because the product sales representative didn’t have expertise to help us with start-up let alone troubleshooting problems.
3) Job # 3 – Which will take us back to Job # 1 briefly. The sales representative for the product from job # 1 showed up in my office with sales literature. I refused to take it and told him about my experience with the product. He said he could get me factory assistance to help correct Job # 1 which is now almost 3 years old resolved. I told him I would talk to the customer but informed him that he has requested prices to remove both systems from their site. If the factory would assume the responsibility for all cost we could approach the subject with the customer. The following day, like on queue a job turned up with the same product. One of my service customers had a renovation project completed with a large variable flow system. The call I received was like this “the customer had a service call for a new unit in the fitness area that need to be reset every time they used the room since start-up. They wanted us to take care of the problem now that the warranty was over.” I assumed it was a single cassette ductless split. When the tech called and told me what he was looking at and that he need technical support I passed on the product representative’s name as someone to call for support. The next morning I came in to find our parts person putting together a 500 page booklet that had been e-mailed to the technician. Their idea of technical support was a 500 page book. When I called to ask the product representative if that was his idea of good product support he told me that “the guy” wasn’t available for 3-weeks and if I sent my technicians (22 mind you) away for a 3-day class they would know how to work on the system without help. The technician that was on site has over 20 years of commercial and industrial HVAC experience.
I am sure that there is a leaning curb associated with every new technology but this one seems like it’s going to cause a lot of discomfort. Back in February I expressed my opinion that the package units with the inverter duty compressors would help us gain a better understanding of how these systems operate and what to expect under different conditions. This is one service aspect that we need to address so that we can train technicians on the common functions of the different manufactures’ systems. The next thing is how to install the systems in such a way as to allow malfunctioning systems to remain on line while making repairs. A simple refrigerant leak or failed metering device can take an entire system down for repairs. The installation of valves and access fittings, plus keeping all piping accessible can suddenly make the installation not so cost effective.
Thursday, February 25, 2010
Crossroad or Access Ramp;
There are so many things happening in our industry that we are surely at the beginning of major shift in how we do business. At a recent trade show I saw and heard more new things than I have in years. I’ve been trying to acquire the knowledge to pass on the information one topic at a time. I’ve come to realize that it’s just not out there in the main stream arena yet. So for now I want to just throw out a couple of what we’ll call future topics for later posting.
IEER, Inverter Energy Efficiency Rating is a new standard that will be the acronym for the coefficient of performance for equipment with variable capacity compressors. We all know that these units consume less electricity than standard units but the realization of how much is going to drive demand. IDC’s, Inverter Duty Compressors in package units will help technicians get comfortable with the technology. Variables are removed with a package unit that allow a technician to experience how these systems are going to function under varying load conditions. A package unit with a factory charge will give them a chance to see what to expect with problems like dirty coils, low refrigerant and restrictions. The numbers floating around for the energy savings are 40% less than a standard unit. The new mentality will be the price difference between major repairs and unit replacement will be realized in few years with the energy savings.
Variable Refrigeration Flow Systems with air and water cooled refrigerant plants. To date we’ve been hesitant in our area to get behind them as design build and direct to owner upgrades. However they're getting in more plan and spec jobs every year. There are currently 3 big players and a 4th is on the way. As more systems are installed and we get comfortable servicing them the market will grow in direct proportion to people’s desire to save money on installation and operating cost. These systems have so many advantages they seem too good to be true. We can’t deny how they should be the first choice for many installations. If they work as intended without being a high maintenance hard to troubleshoot and repair system they’ll corner the market.
The quick wrap up is as follows, cast boilers are out, burners are out, and cooling towers are going down with big chillers. High efficiency tube boilers with modulating outputs are in. Air cooled chillers with several small circuits and plate heat exchangers are in. Packaged equipment from standard heat/cool to chilled water/hot water plants are in. Reciprocating, screw and centrifugal compressors are out, scrolls and inverters are in. Expect more on all these topics as the information becomes available.
IEER, Inverter Energy Efficiency Rating is a new standard that will be the acronym for the coefficient of performance for equipment with variable capacity compressors. We all know that these units consume less electricity than standard units but the realization of how much is going to drive demand. IDC’s, Inverter Duty Compressors in package units will help technicians get comfortable with the technology. Variables are removed with a package unit that allow a technician to experience how these systems are going to function under varying load conditions. A package unit with a factory charge will give them a chance to see what to expect with problems like dirty coils, low refrigerant and restrictions. The numbers floating around for the energy savings are 40% less than a standard unit. The new mentality will be the price difference between major repairs and unit replacement will be realized in few years with the energy savings.
Variable Refrigeration Flow Systems with air and water cooled refrigerant plants. To date we’ve been hesitant in our area to get behind them as design build and direct to owner upgrades. However they're getting in more plan and spec jobs every year. There are currently 3 big players and a 4th is on the way. As more systems are installed and we get comfortable servicing them the market will grow in direct proportion to people’s desire to save money on installation and operating cost. These systems have so many advantages they seem too good to be true. We can’t deny how they should be the first choice for many installations. If they work as intended without being a high maintenance hard to troubleshoot and repair system they’ll corner the market.
The quick wrap up is as follows, cast boilers are out, burners are out, and cooling towers are going down with big chillers. High efficiency tube boilers with modulating outputs are in. Air cooled chillers with several small circuits and plate heat exchangers are in. Packaged equipment from standard heat/cool to chilled water/hot water plants are in. Reciprocating, screw and centrifugal compressors are out, scrolls and inverters are in. Expect more on all these topics as the information becomes available.
Monday, February 1, 2010
An Alternate Way to Save;
Last year ModernControls approached a long time customer that operates 7 facilities with a request to increase the scope of work in their preventive maintenance agreement. After performing a review of the repairs from the previous year we identified the 3 locations that had the most potential for savings. We showed the Facility Director what we had found and laid out a detailed plan to reduce the cost of service. We found that the 4 facilities where we did the most preventive maintenance the costs were the lowest. In the other 3 facilities the cost of service calls to complete routine maintenance, general repairs, and overtime to service units was the highest. The Facility Director agreed with the analysis and we increased the scope of preventive maintenance.
This year he requested an analysis to justify the additional money he spent on maintenance the previous year. ModernControls provided a detailed cost breakdown that showed a 30% reduction in the total expense for HVAC repairs and preventive maintenance in the 3 buildings. That 30% amounted to more than $ 75,000.00 in savings. The facilities director was recognized in a recent board meeting for his overall reduction in the cost of maintaining the facilities. We all knew we had done the right thing but the dollar figure was over the top. Our industry has been so focused on reducing energy consumption that we haven’t tried to quantify the potential savings of preventive maintenance. Until now.
ModernControls recently invested in a software program that will allow us to build a database over the next few years that will perform this type of analysis automatically. Our hope is that the information we started collecting will be the beginning of a long term commitment to our customers. We changed our standard Work Orders to start collecting more information and we update the repair status and resolution as we go. It added a few steps to the process but the information should allow us to zero in on problem pieces of equipment so that we can provide better advice to our customers. When factoring in the operation efficiency of existing equipment to show a payback for replacement it also helps to factor in the cost of repairs and maintenance. If you’d like to learn more feel to stop by our office.
This year he requested an analysis to justify the additional money he spent on maintenance the previous year. ModernControls provided a detailed cost breakdown that showed a 30% reduction in the total expense for HVAC repairs and preventive maintenance in the 3 buildings. That 30% amounted to more than $ 75,000.00 in savings. The facilities director was recognized in a recent board meeting for his overall reduction in the cost of maintaining the facilities. We all knew we had done the right thing but the dollar figure was over the top. Our industry has been so focused on reducing energy consumption that we haven’t tried to quantify the potential savings of preventive maintenance. Until now.
ModernControls recently invested in a software program that will allow us to build a database over the next few years that will perform this type of analysis automatically. Our hope is that the information we started collecting will be the beginning of a long term commitment to our customers. We changed our standard Work Orders to start collecting more information and we update the repair status and resolution as we go. It added a few steps to the process but the information should allow us to zero in on problem pieces of equipment so that we can provide better advice to our customers. When factoring in the operation efficiency of existing equipment to show a payback for replacement it also helps to factor in the cost of repairs and maintenance. If you’d like to learn more feel to stop by our office.
Monday, January 18, 2010
Domestic Water Pump Cost Analysis;
ModernControls recently completed a proposal to upgrade a failing domestic water pump system for a Wilmington High-rise. The existing system has a primary pump with a hydraulic fluid mechanically operated unloader system to relieve pressure during periods of low or no demand. The motor however runs continuously. The backup emergency use only pump has a hand valve that is set to bypass water from supply to return to maintain water pressure. Neither assembly is very efficient and so both run near rated amp draw.
Our research began with the initial visit to the site to gather information. The second trip to the site was more clearly defined with the help of the product representative’s knowledge and experience with the product line. We initially planned to install a pump package but found the physical constraints within the mechanical room too restrictive. We put the equipment package together with the product representative supplying the pump and us supplying the rest. A third visit to the site was not necessary to complete the proposal, however a third visit is planned to meet with the board members to explain the proposed equipment and how the replacement work would be scheduled to eliminate down time.
The pump manufactures representative found a 5 horse power pump that could provide the same results as the 7.5 horse power pump so we’re able to provide an initial cost savings by reducing the horse power by ⅓. The installation of a Johnson Controls variable speed drive and Metasys digital controls brings the projected cost savings to somewhere between 60% and 75%. The projected payback period for the installation is between 5 and 6 years, not bad for a necessary upgrade. With the focus today on green technology the availability of information to project cost savings gets better all the time. The projected cost savings calculation sheet used for this analysis accounted for the change in peak demand after the first year since this customer electric bill is based on a peak demand rate. If you’re wondering how much you could save by making changes, chances are someone already came up with a way to quantify it.
Our research began with the initial visit to the site to gather information. The second trip to the site was more clearly defined with the help of the product representative’s knowledge and experience with the product line. We initially planned to install a pump package but found the physical constraints within the mechanical room too restrictive. We put the equipment package together with the product representative supplying the pump and us supplying the rest. A third visit to the site was not necessary to complete the proposal, however a third visit is planned to meet with the board members to explain the proposed equipment and how the replacement work would be scheduled to eliminate down time.
The pump manufactures representative found a 5 horse power pump that could provide the same results as the 7.5 horse power pump so we’re able to provide an initial cost savings by reducing the horse power by ⅓. The installation of a Johnson Controls variable speed drive and Metasys digital controls brings the projected cost savings to somewhere between 60% and 75%. The projected payback period for the installation is between 5 and 6 years, not bad for a necessary upgrade. With the focus today on green technology the availability of information to project cost savings gets better all the time. The projected cost savings calculation sheet used for this analysis accounted for the change in peak demand after the first year since this customer electric bill is based on a peak demand rate. If you’re wondering how much you could save by making changes, chances are someone already came up with a way to quantify it.
Thursday, January 14, 2010
Preventive Maintenance Contracts;
Modern Controls offers customized Preventive Maintenance and Full Service Contracts for all your HVAC mechanical equipment and controls. Indisputably, Modern has the strongest service team throughout the Tri State Region. Modern has a fleet of over 40 technicians on the road, and has been providing HVAC Services for over 20 years.
Most of the technicians have over 10 years of direct commercial and industrial experience. The technicians have a broad range of skills to meet your every need. We have technicians specialized in working on chillers, boilers, cooling towers, package rooftops, you name it.
Most of the technicians have over 10 years of direct commercial and industrial experience. The technicians have a broad range of skills to meet your every need. We have technicians specialized in working on chillers, boilers, cooling towers, package rooftops, you name it.
Do any of these sound familiar?
a system that has leaked and ruined the ceiling tiles
an area that is always hotter or colder than the rest of the building a system that never seems to shut off
no preventive maintenance is getting done to avert a crisis
a system that never works right and is always breaking down
a system that has multiple repair calls for the same problem
waiting for days just to get a repair technician on site
getting a technician that doesn’t have the ability to fix the problem
receiving billing that doesn’t make sense or is late
reminding your service group to perform the preventive maintenance
Modern Controls is prepared to handle all these issues and to provide you with the professional service that you deserve at a very reasonable price. We will tackle your toughest problems with confidence and create solutions.
Call or E-mail today to set up your FREE HVAC SYSTEM SURVEY for a Preventive Maintenance Agreement.
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