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How Often Should You Change the Filter?
Every 30 days, when it looks dirty, or according to some other criteria?
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Soffit-to-Ridge Venting, Part 2
Refinements to the testing protocol and field testing
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The Problem With Skin Flakes in Your Air Conditioner
If you have a urine-like smell coming from the AC, skin flakes may be the reason
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Supply Air Filtration and Airflow Pressure
Strategies for ensuring low pressure drop cross a high-MERV filter
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Heat Pump Balance Point and the Building Enclosure
The quality of a home’s building enclosure can have a big effect on heating with a heat pump
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How (Older) Homes Work
A two-evening building science class for homeowners
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A Simple Way to Calculate Heat Pump Balance Point
All you need are the design heating load and the heat pump capacity
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Three Types of Heat Pump Heat
Pumped heat isn’t the only one
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Controlling Humidity in Winter
Hint: Airtight homes usually don’t have a problem with dry air
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Soffit-to-Ridge Roof Venting, Part 1
Does air flow in cathedral roof assemblies really follow those arrows?