Air to Water Heat Pump
Air-source heat pumps draw heat from the outside air during the heating season and reject heat outside during the summer cooling season. Air-to-water heat pumps are used in homes with hydronic heat distribution systems.
All air has some heat energy in it, and a heat pump can extract heat from air even at low temperatures. A refrigerant fluid absorbs the extracted heat and undergoes compression to increase its temperature. The heated fluid then transfers its heat the hot water baseboards in your home. The opposite takes place in summer when the heat inside your home is conveyed to the outside to cool your home.
Heat pumps use electricity, but they can reduce your electricity use for heating by approximately 50% compared to furnaces and electric baseboard heaters.
An air-to-water heat pump is used in a hydronic system where the heating or cooling is distributed using water, such as hot water baseboard, in-floor heating or radiant panels.
Look for the Energy Star label, and these three performance ratings when choosing - The higher the better:
- COP (Coefficient Of Performance)
- HSPF (Heating Season Performance Factor)
- SEER (Seasonal Energy Efficiency Ratio - more related to cooling)
Work with a reliable heat pump contractor to ensure you have the right size of heat pump and that it is installed correctly. Be very careful that only a licensed refrigeration technician installs, maintains, and later decommissions your heat pump. Current heat pumps contain a refrigerant gas that should not be allowed to escape to the atmosphere when servicing the equipment, because it contributes to climate change.
A heat pump can be one of the most energy-efficient ways to use electricity to heat your home. In a moderately cold winter climate like the northern US or southern Canada, an air-source heat pump can be three times more efficient than regular electric resistance heating (such as electric baseboard heaters) and oil furnaces or boilers.
The first working heat pump was invented by an Austrian, Peter von Rittinger, in 1855, to evaporate water from salt brine to make salt.