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Ducts
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- Typical duct systems lose 25 to 40 percent of the heating or cooling energy put out by the central furnace, heat pump, or air conditioner.
- How to make homes tight and ventilate right.
- Responding to a question from our readers.
- In a typical forced-air system with leaky ducts and an inefficient filter, the ducts are usually contaminated with a wide variety of particulates and microorganisms—all directly exposed to the air being breathed by the occupants.
- Simple strategies that can help you lower your energy bills.
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