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Building Science
Replacing an Air Conditioner With a Same-Size Heat Pump

When replacing a furnace with a heat pump, it's critical to determine the heating and cooling loads; do not assume the current system is sized correctly
Q&A Spotlight
Calculating Loads for Helical Piers

Substituting piers for standard concrete footings raises questions for a reader planning a new deck
Building Science
Oversized HVAC Equipment

Manual J Load calculations can be manipulated to suggest heating and cooling demands that are said to require inappropriately sized systems

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Replacing an Air Conditioner With a Same-Size Heat Pump