Derek Cole breaks down the three things that make a home energy efficient: the HVAC unit, the duct system, and the building envelope. If any one leaks, is undersized, or poorly insulated, your whole system fails.
There are 3 factors to every single home. There is the unit, the duct system, and what we call the envelope, which is the house. If one of those 3 are off or having a challenge, you're not going to be efficient. If you don't have enough insulation in your home, you're not going to be efficient. If your duct system is leaking, you're not going to be efficient. If you have the wrong size unit, you're not going to be efficient.
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