Christopher Morin's Blog – July 2014 Archive (2)

How do You Test a TXV?

  Thermostatic Expansion Valves (TEV or TXV), one of the most popular metering devices for residential, high-efficient air conditioning and heat pumps, have performed almost impeccably for decades.  Unfortunately, some manufacturers in the past few years have identified batches of valves that have had high superheat issues.  Have we just been blind for so long, not realizing these problems existed?  Or have these valves really been so reliable for such a long time?

  If you think you…

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Added by Christopher Morin on July 21, 2014 at 6:30pm — 3 Comments

Please, Make the Transition!

  For as long as I can remember, the agreed epidemic with ductwork was always undersized return ducts.  Although we are far from perfect with duct sizing in New England, I have frequently seen great strides in fixing this issue - particularly with replacement systems.  Lets face it, you should just be properly designing the duct system on new installations.  Undersized ducts cause great restrictions in airlfow, raising…

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Added by Christopher Morin on July 17, 2014 at 5:29pm — No Comments

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Air duct testing questions.

Many towns are now adopting the 2012 code about duct testing.  This is a great thing. However I…See More
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