For years, owners have looked at dilapidated, rusted out air handling units in their mechanical rooms and thought, “If I could only get rid of this old unit and replace it with a newer, more sophisticated design.” This is possible, provided you stop listening to the usual pitch by those who tell you to rehabilitate the old unit. After rehabilitation, you are still left with...
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Large indoor and outdoor central station air handlers eventually wear out and require either a complete refurbishment or replacement. They are usually located in ceilings, tight utility rooms, or mechanical rooms without access. Even the units that are on the roof or in a penthouse can require difficult, costly procedures to make replacement possible. ...
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Replacing heat exchanger coils was adapted ever since the beginning of the HVAC and processing/cooling era. It’s now close to 90 years since the first finned tube heat exchangers appeared on the market in the early 1900’s. The coil has undergone drastic changes over the years, from the spiral wound type to the plate fin coils that currently dominate the market. Throughout each decade, the...
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If you’re in the HVAC industry, then you’ve been involved in projects and installations that have duct mounted booster heating coils. How did the term “booster” originate? Most heating coil applications have a main heating coil that takes air from the lowest entering air temperature to an intermediate air temperature. Each individual space has its own heat load, and the duct mounted booster coil is...
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