What Is Coefficient of Performance (COP)?
A plain-English explanation of Coefficient of Performance (COP) — what it means, how it works, and why it matters for your home energy.
Definition
A measure of heat pump efficiency: units of heat output per unit of electricity input
Coefficient of Performance (COP) Explained
COP measures how efficiently a heat pump converts electrical energy into heat energy. A COP of 3.0 means the pump delivers 3 kWh of heat for every 1 kWh of electricity used. UK heat pumps typically achieve a seasonal COP (SCOP) of 2.5-3.5. Higher COP means lower running costs.
How Coefficient of Performance (COP) Works
- 1. Measure electricity consumed by the heat pump (kWh)
- 2. Measure heat delivered to your home (kWh)
- 3. Divide heat output by electricity input
- 4. Result is the COP (e.g. 3.0 = 300% efficiency)
Coefficient of Performance (COP) — Pros & Cons
| Pros | Cons |
|---|---|
| Reduces energy bills | Upfront installation cost |
| Lowers carbon emissions | May require property modifications |
| Government grants available in Wales | Performance varies by property |
| Increases home comfort | Requires qualified installer |
| Can increase property value | Payback takes several years |
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Get Free Quote →Coefficient of Performance (COP) — FAQ
What is Coefficient of Performance (COP)?
A measure of heat pump efficiency: units of heat output per unit of electricity input
How does Coefficient of Performance (COP) work?
COP measures how efficiently a heat pump converts electrical energy into heat energy. A COP of 3.0 means the pump delivers 3 kWh of heat for every 1 kWh of electricity used. UK heat pumps typically achieve a seasonal COP (SCOP) of 2.5-3.5. Higher COP means lower running costs.
What are the benefits of Coefficient of Performance (COP)?
The main benefits include lower energy bills, reduced carbon emissions, and increased home comfort. Many Welsh homeowners also benefit from government grants through schemes like Nest, Warm Homes Programme Wales, and ECO4.
Is Coefficient of Performance (COP) available in Wales?
Yes. Coefficient of Performance (COP) is available across Wales. Welsh homeowners may qualify for grants to help cover installation costs. Check your eligibility for free.
How much does Coefficient of Performance (COP) cost?
Costs vary depending on system size and property type. The best way to get an accurate price is to request a free quote from MCS-certified installers in your area.