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Ed Janowiak is ACCA's Manager of HVAC Design Education and can be reached at ed.janowiak@acca.org or 703-824-8878.
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While attending ACCA 2025 at the Kalahari Resort in Texas this past March, I was asked a question that comes up often. The question focused on adding extra BTUs to the calculated heat gain to account for what was described as “additional loads.”
In this edition of “Hey Ed,” Ed discusses the advantages of charging with liquid.
In this edition of “Hey Ed,” Ed discusses AHRI ratings and their usefulness in comparing various makes and models of air conditioners and heat pumps.
In this edition of “Hey Ed,” Ed discusses the efficacy of ceiling fans in the summer and winter months.
In this edition of “Hey Ed,” Ed discusses managing customer expectations when it comes to their heating and cooling system.
In this edition of “Hey Ed,” Ed discusses gray refrigerant tanks.
In this edition of “Hey Ed,” Ed discusses digital gauges versus analog gauges.
In this edition of “Hey Ed,” Ed discusses the new EPA 608 certification for A2Ls.
In this edition of “Hey Ed,” Ed discusses how A2L can be charged as a liquid.
In this edition of “Hey Ed,” Ed discusses how zeroing your gauges is not the same as calibrating them.
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Something I’ve observed for quite some time, but it seems to need more attention lately, is how we are actually sizing airways— commonly referred to as ductwork. I appreciate when people say they’re using the Manual D® process when discussing duct designs.
In this edition of “Hey Ed,” Ed discusses suction saturation temperatures.
In this edition of “Hey Ed,” Ed discusses the differences between air handlers, fan coils, and furnaces.
In this edition of “Hey Ed,” Ed discusses the best way to do your Manual D® calculations.
In this edition of “Hey Ed,” Ed discusses substituting a home’s location for another.
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Is one return enough? Had a conversion will a fella about a topic I hear about far too often. He had someone ask (require) for there to be a return in every room. I knew Manual D® didn’t say that.
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