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Message: [QUOTE="bfs3, post: 4814024, member: 10189"] As someone who has designed and sold HVAC systems in both CT and GA I can probably help a little here. Standard efficiency split heat pump systems will still heat down to about 32-36 degree outdoor temperature. At that temperature they need to work harder and they switch on a secondary heat source. Typically this would be an electric resistance coil, not all that different from an electric oven or a toaster. It is important to know that most homes in CT need more BTUs to heat a home below freezing than cooling BTUs to cool a home when it’s 95 degrees outside. Let’s say you have a 2.5 ton AC system. That’s 30K Cooling BTUs. A 2.5 ton Heat Pump would be capable of producing both 30K cooling BTUs and 30K heating BTUs. That same house likely needs 60-70K heating BTUs in order to heat it to 70 degrees when it’s 25 outside. This means that even an inverter driven heat pump (think condensers like ductless mini splits) that will heat to 0 degree outdoor temp, would still not be able to heat your home. There does exist heat pump condensers that will continue to heat to zero degree outdoor temperature. They just won’t provide you with enough heat. These are typically the most expensive and efficient heat pump systems available ($15-25K depending on brand). The best solution if Natural Gas isn’t available would be to look at switching to a propane heating system with a dual fuel set up. That’s a heat pump that switches to propane when it gets too cold. Also keep in mind that just because your home is set up with ductwork to cool it, that doesn’t mean it’s set up to heat it. [/QUOTE]

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