Beauty and the beast upstairs
The same features that are often added to the top story of homes to give them distinctive architectural beauty can also make them rather beastly to heat or retrofit. One-and-a-half-story houses, like the Cape Cod-style…
Continue ReadingAir sealing in occupied homes
Over the last decade, many new techniques have evolved for improving the airtightness of existing homes. With this increased ability has come the responsibility to be comprehensive. There are few areas of residential construction…
Continue ReadingAir sealing in low-rise buildings
Reinforcing the pressure barrier in low-rise multifamily buildings can increase occupants’ comfort and savings. Multifamily buildings vary widely. They range from houses divided into three apartments to 500-unit high rises. So a weatherization project must be…
Continue ReadingShould I be adjusting my blower door readings for temperature and altitude?
The temperature of air affects its density. When air heats up it expands, and when it cools it contracts. Because of this and other effects, we need to make an air density adjustment. For example,…
Continue ReadingBlower door test with wrong ring setting on gauge. What to do?
I Did A Blower Door Test With The Wrong Ring Setting On My DG-700. Is There A Way To Calculate The Correct Reading? Yes, there is. Channel B of the DG-700 is actually measuring a…
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