Did you know that we can use an air source heat pump here in Michigan? It's true! Heat pumps deliver efficient heat well in the thirties. When properly installed, a heat pump will deliver 1.5 to 3 times more heat energy into our homes and businesses than the electrical energy it consumes. That’s because a heat pump is really only moving heat from one place to another. That’s money in our pockets!
We have clients here in Michigan that have not burned any gas as of mid November! I know, it’s hard to imagine heating your home with cold air. That’s exactly what a heat pump does! It may not feel like it, but there is a lot of heat or energy in 35 degree air.
Freon gets really cold when it expands into a gas form. It is then pumped through an outdoor coil and soaks heat from the air. (even cold air!) Now we have a low pressure Freon gas that is the temperature of the ambient air.
Now the Freon is compressed into a high pressure gas. When the gas is compressed, so is the heat. It is then pushed through a coil inside and releases its heat. A typical air source heat pump looks just like a central air unit. In the summer, the system reverses and acts as an air conditioner!
In heating mode, an air-source heat pump evaporates a refrigerant in the outdoor coil, as the liquid evaporates it pulls heat from the outside air. After the gas is compressed, it passes into the indoor coil and condenses, releasing heat to the inside of the house. The pressure changes caused by the compressor and the expansion valve allow the gas to evaporate at a low temperature outside and condense at a higher temperature indoors.
In cooling mode, an air-source heat pump evaporates a refrigerant in the indoor coil; as the liquid evaporates it pulls heat from the air in the house. After the gas is compressed, it passes into the outdoor coil and condenses, releasing heat to the outside air. The pressure changes caused by the compressor and the expansion valve allow the gas to condense at a high temperature outside and evaporate at a lower temperature indoors.