Understanding COP and SCOP

The new generation of Poolex heat pumps have SCOP ratings as well as the traditional COP ratings, but what is SCOP and how does it vary from COP?

The Coefficient of Performance (COP) measures the heating efficiency at a specific moment. It’s the ratio of the energy output to the energy input, essentially showing how much heat is produced per unit of energy consumed.

Most manufacturers typically quote the COP of air source heat pumps, however these values are based on specific air and water temperatures.

The heat pump’s COP will vary according to the actual water temperature, the rate of heat loss and importantly, outside temperature, COP decreases in colder conditions.

Whereas SCOP is the ratio of the total amount of heat delivered divided by the total amount of energy consumed over a period of time.

A SCOP rating accounts for temperature fluctuations, offering a comprehensive measure of annual energy performance.

The Seasonal Coefficient of Performance (SCOP) provides a more realistic picture of a heat pump’s efficiency over an entire heating season.