Items Tagged with 'depressurization test'

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Is It Better to Test Ducts with a Positive or Negative Pressure?

August 20, 2012
A very common complaint about duct testing is that the covers get blown off the registers. Most code language leaves the choice of pressurizing or depressurizing up to the tester, but experience has shown that the positive pressure made sealing registers much more difficult, and could triple the time to perform a test.


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Mini Split Installation

Twin Cities contractor Aabott Ferraro helped retrofit an older St. Paul home.

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NEWSMakers: Doug Dougherty

Doug Dougherty, president and CEO of the Geothermal Exchange Organization (GEO) joins the program to discuss the latest happenings with GEO, including the drive to get included in state and federal definitions of renewable energy, plus the future of geothermal.  Posted on July 25.

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2014 July 28

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R-22 PHASEOUT POLL

Some in the industry are calling for the EPA to halt production of R-22 as of 2015. What do you think?
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2014 National Plumbing & HVAC Estimator

Every plumbing and HVAC estimator can use the cost estimates in this practical manual!

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