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HVAC/R Evacuation Quiz December 10, 2021, 1:40 am
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Every year. We watch it EVERY YEAR, and it still gets to me again and again. Call me a sucker, but especially living a blue-collar life working in the trades, It's a Wonderful Life describes the way many of us live. Even more so, it captures the way we can start to feel about our […]
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Evaporator temperatures below 32° are common and acceptable in refrigeration; that's why there is a defrost sequence. In a heat pump running in heat mode, it's the same; freezing is a part of the process, and defrost is necessary. In comfort cooling, we can't allow the evaporator to get below 32°, or it will freeze. […]
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This article was written by HVAC/furnace technician Benoît Mongeau. Thank you, Ben. High efficiency (or 90%, or condensing) furnaces use a set of two heat exchangers to retrieve more heat from the combustion products than their mid-efficiency counterparts. Because of this, they generate flue gases much colder than those of a mid-efficiency or […]
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