air handlers
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Planning a Furnace-to-Ducted Heat-Pump Retrofit, Part 2: Data Collection
Answer these questions before making the switch from a gas or oil furnace to a heat pump
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Planning a Furnace-to-Ducted Heat Pump Retrofit, Part 1: Needs Assessment
The advantages of using an air handler when replacing a gas furnace with heat-pump technology
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Ducts in an Unconditioned Attic
The best place for ductwork is inside the thermal boundary of the house, not in an unconditioned, vented attic
