HVAC Residential Market

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The big push is on to replace R-22 unitary air conditioners and heat pumps, and it looks like the industry has really and truly decided that R-410A systems are “it.” This article offers an overview of some of the issues related to R-22 and -410A in the field: operating pressure differences, oil characteristics, and temperature glide.

The compressor’s discharge temperature can tell the service technician what is going on inside a refrigeration or air conditioning system.

Bob Forty knows all about condensing coils. As president of Energy Services Air Conditioning and Heating Co., and a 30-year self-proclaimed student of the hvac industry, Forty has seen a lot of trends come and go. One of the trends he’s not happy about at all is condensing coils that are made from aluminum (aluminum tube/aluminum fin).

Following up on Howard Leonard’s October 10, article, “Hidden Problems Can Cause Carbon Monoxide,” Leonard elaborates on the discharge side of the combustion air system, the flue.

Residential heating and a/c contractors benefited directly from the building boom, as shopping centers, new homes, schools, and commercial construction followed the GI’s and their families into the suburbs.

Thousands of years ingenuity have brought us to heating as we know it.

This article explains what knowing the condition of the evaporator coil has to do with charging an air conditioner properly.

The myth that the silicon carbide tip cannot be handled because body oils cause contamination is untrue.

Technicians and engineers can benefit from using these shortcuts for estimating and solving operational problems.

What happens if a system doesn't have a defrost/termination/fan delay control?