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Checking temperatures in and out of the air conditioning coil is an important part of preparing a residential air conditioning system for the season. This article will cover how checking temperatures through an evaporator coil can tell a service technician if there’s a problem in the air-handling system or refrigerant system. It will also cover other general troubleshooting areas.

Verifying a diagnosis will take additional time, but this is time well spent. It will actually save time and money for both the technician and the customer by reducing the amount of callbacks and reducing the replacement of non-defective components on the job. It will also allow the technician to leave the job with peace of mind, knowing he has made a correct diagnosis.

EDITOR’S NOTE: This is part two of a two-part series. The first part, "Tips for Surviving Refrigerant Transitions, Part 1," appeared in the Feb. 1, 2016, issue of The NEWS.

Tightening a home’s envelope may reduce the air supply needed for combustion, and when there’s not enough combustion air, equipment could have combustion ventilation problems. Thus, the people who sealed up homes (often referred to as the weatherization industry) needed a way to determine if sealing a home up would undermine the safe operation of combustion equipment. To meet this safety need, they embraced combustion appliance zone (CAZ) depressurization testing.

Pick a trend, any trend, and hop on board. Or, you can wait for everyone else to start doing it and play catch up — your choice. By being proactive, you can divert more traffic, capture more eyeballs and leads, and slowly cause your competitors to lose relevancy and cool points, which isn’t a bad trend either.

Industry figures are estimates that are derived from the best available figures supplied by a sample of AHRI member companies. 

Air purification is a highly competitive, emerging space in HVAC, and manufacturers are constantly trying to innovate and stay ahead of the curve in relation to the needs of customers.

The ASRAC established the Central Air Conditioners and Heat Pumps Working Group in July 2015; it is the latest of several working groups to successfully create negotiated efficiency standards for industry equipment. Other negotiated rulemakings aided by working groups include walk-in coolers and freezers, regional standards enforcement, and commercial rooftop air conditioners and furnaces. 

Ultraviolet (UV) light has been growing as part of the HVAC landscape for years, specifically within the IAQ arena. ASHRAE's validation is certainly a huge step forward for UV, but many manufacturers believe this technology has already proven its value, as its growth and expansion began years ago.