Cleaning Plate and Frame Heat Exchangers
 Cleaning Plate and Frame Heat Exchangers

Cleaning Plate and Frame Heat Exchangers

Posted by Bob Schneider on in Engineering

Central Plants may utilize plate and frame heat exchangers for “free cooling” or other types of heat transfer. Maintenance of your plate and frame heat exchanger should be part of your scheduled service program. The plate exchanger, shown below, consists of corrugated plates assembled into a frame. The hot fluid flows in one direction in […]

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Double the Boiler Size and Fire the Engineer?

Double the Boiler Size and Fire the Engineer?

Posted by Dan Jackson on in Engineering

That’s an old HVAC engineer joke. Often when we’re asked to evaluate comfort problems, we find this was more than just a joke. A building’s cooling load is the rate of heat rejection required to keep it cool inside. Conversely, the heating load is the amount of added heat needed to keep it warm inside. […]

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Choose the Right Replacement Boiler

Choose the Right Replacement Boiler

Posted by Joe Weagraff on in Engineering

Your boiler needs to be replaced. It’s old and inefficient and your natural gas costs are sky rocketing. What type of replacement boilers should you look at? There are condensing, non condensing, steel or copper water tube or fire tube, to name a few, and efficiencies range from 75% to 96%. You will need to […]

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MEP Engineering Considerations for Alterations to Existing Walls, Roofs and Windows

MEP Engineering Considerations for Alterations to Existing Walls, Roofs and Windows

Posted by Joe Weagraff on in Engineering

The two questions most often raised regarding the thermal performance of changes to existing walls, roofs and windows are: We’d like to add insulation to the building, but if we do, does it have to meet code? If a window or storefront is being replaced, can we just match the existing so the look remains […]

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Condensate Piping Design

Posted by Dan Jackson on in Engineering

The next time you are on the roof, take a look at your condensate drains from the rooftop air­ conditioning units. You will be surprised that many of the drain lines are broken or do not have a “trap” in the piping. Why do you need a trap on your rooftop air­ conditioning unit? Most […]

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