#Adam Mufich

Tech Tips:

Angry Air
By:Adam MufichAbout a month ago, one of my techs went on a “no heat” call. The house is a rectory for the church next door. The call came in, and after he ran it, I assumed the problem was solved since I hadn’t heard otherwise.  A few weeks later, they called back, saying the boiler was […]
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Good COP – Bad COP
By:Adam MufichThere has been a lot of advice being tossed around by contractors and builders about the best time to use the emergency heat feature on an all-electric heat pump system. The answer is never! That was easy. Next article… In all seriousness, “Emergency Heat” should be used as described, ONLY during an emergency. I guess I […]
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Is Value Perceived?
By:Adam MufichThe other morning, I was scrolling through HVAC Facebook groups when I came across a post from a homeowner. He was requesting recommendations for a book that would teach him how to design and install a new HVAC system, complete with ductwork, in his home. Immediately, my HVAC career flashed before my eyes like a Christian […]
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What to Do with Your Micro-Manometer
By:Adam MufichImagine this: you are pulling into your driveway from a long day at work, and you see a package waiting for you on your porch. You jump out of your truck and trip over the rose bush while running to see if this is what you have been waiting for. Upon closer inspection, you realize that […]
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Under Pressure
By:Adam MufichA few weeks ago, I was hired to consult on a multi-family new construction project.  The building was already framed, and the ducts were roughed in.  The owner of the building was concerned with the quality of the ductwork.  He noticed that the HVAC company was not following the mechanical engineer's plans. This was […]
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What Airflow Goes Around HAS to Come Around
By:Adam MufichHave you ever woken up early on a Saturday morning and thought to yourself, “I really wish I knew how to size transfer grilles and jumper ducts properly?” I know I have. Although come to think of it, I believe it was a Friday morning.  Properly sizing transfer grilles is something I have been […]
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Is R22 legal to use?
By:Adam MufichI've recently seen heated debates in different HVAC groups about whether it is okay to recharge a residential HVAC system with R22 without locating and repairing the leaks. I've had residential customers call me and complain about other companies telling them they must replace their system because it leaks. They've also stated that it […]
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Does your Kitchen Exhaust Suck?
By:Adam MufichHave you ever been tasked with installing the exhaust duct for a kitchen hood?  I have, and when doing so, I wondered how to size the duct run correctly. Since I had a basic understanding of how airflow works, I knew that there had to be a limit on the resistance the fan can […]
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Equivalent Length Merry-Go-Round
By:Adam Mufich I recently read a tech tip by Matt Bruner about using the Manual D process. In the article, he designed a duct system for a small job using a ducted mini-split. One thing I noticed about his design was that the supply and return duct velocity was fairly low compared to the arbitrary […]
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