Air Source Heat Pumps resemble a residential central air conditioner.
The only difference between a heat pump and an air conditioner is the heat pump’s ability to reverse the flow of refrigerant so that the equipment can provide heating in the winter as well as cooling in the summer. Because heat is absent only at absolute zero (-273 degrees celsius), heat pumps can operate even during the coldest Canadian winters. However, both efficiency and capacity decrease with significantly lower outside temperatures. Air source heat pump efficiency is measured in HSPF (Heating Seasonal Performance Factor) which is described within the EER (Energy Efficiency Ratio) definition. Another popular type of Heat Pump is the Ground Source Heat Pump (GSHP).
Air Source Heat Pump
