Energy Savings
What is COP and what does it mean?
- COP (Coefficient of Performance) is a relative measurement of the efficiency of a heat pump.
- COP is the relationship between the power input (in kW) supplied to the heat pump’s compressor compared with the heat output of the heat pump’s condenser (in kW).
- If a heat pump has a COP = 3 for example, that means for every 1 kW supplied to the compressor, 3 kW of heat is outputted by the condenser
- Comparing to a mid-efficiency gas furnace, for every 3,412 btu/h (1 kW) of gas energy supplied, the heat output will be 80~85% (0.8~0.85 kW). For condensing furnaces, 93~99% (0.93~0.99 kW). Either way, the approximate COP equivalent would be <1.
- So if we run the heat pump for ½ of the heating season when the COPs are approximately 3, and then run the furnace for the other ½ of the heating season at just under 1, then the combined average efficiency for the heating season is approximately 2.
- Thus the efficiency increases from <1 (80~99%) with the gas furnace, to approximately 2 (200%) with the hybrid heating system; we can effectively double the seasonal heating efficiency of the mechanical system.