

Spotlight Article:
The Benefits of Zone Pressure Diagnostics
Weatherization and home performance contractors have been using zone pressure diagnostic (ZPD) testing since the 1990s to better diagnose, and ultimately improve, the airtightness of homes. Though our understanding of ZPD testing has come a ...
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Building Science 201: Combustion
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Thirteen steps to taking your contracting services to the next level [continue reading]

HVAC Contractors: Survive and Prosper in Hard Times
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The International Energy Conservation Codes (IECC 2009 and 2012) require HVAC ducts to be tested to prove a minimum leakage of a rather easily obtained 12 CFM/100 square feet of conditioned floor area. While many states and localities ... [continue reading]

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Month after month, you review your maintenance agreement numbers and find that they are dwindling each time you look at them. The last few years may have been tough in a lot of different areas ... [continue reading]

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Send in your stumpers! You know - that problem house, symptom or combination of symptoms that confounded the homeowner and challenged all your building science savvy to solve. Send BPI a description of the problem &... [continue reading]

Air Sealing and the CAZ
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After I described how air can get sucked down the chimney and vent connector and flue, and out the draft diverter of the gas water heater, and into the basement, the mother, who was now ... [continue reading]



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