Which one fits you better?
A resistance radiator converts electrical input into local heat; a heat pump moves additional heat from the environment. Compare the required useful heat across the whole heating season, not only the electrical rating or a device's purchase cost.
Electric radiator
You need simple, occasional point heating with low installation complexity.
Heat pump
You heat regularly and want to move more heat per kWh of electricity through a suitable heat-pump system.
Comparison at a glance
| Aspect | What you should know | How to decide |
|---|---|---|
| Efficiency concept | Direct resistance heating: about 1 kWh electric becomes about 1 kWh heat at the room. | Uses a refrigeration cycle, so seasonal heat output can exceed electrical input by several times. |
| Installation | Simple portable or fixed units. | Higher equipment and installation requirements. |
| Best use | Short, local or occasional heating. | Regular heating where the system is correctly sized and installed. |
| Running cost | Strongly tied to electricity price and heat demand. | Depends on COP / seasonal efficiency, climate and electricity price. |
What matters before you decide
For regular heating, a well-sized heat pump can dramatically reduce electricity use compared with resistance heating. For very occasional use, the low purchase cost and simplicity of a radiator can still be attractive.
Do not compare a single number
Heat-pump efficiency varies with weather, flow temperature, defrost cycles and installation quality. Seasonal performance (SCOP) is more informative than an ideal laboratory COP; a radiator's heat distribution and controls also influence comfort.
Worked example: annual heat delivered to a room
Imagine a room needs 1,500 kWh of useful heat over a season. A resistance radiator would consume approximately 1,500 kWh of electricity to deliver it locally, excluding controls and distribution effects. A heat pump achieving a hypothetical seasonal COP of 3 would use about 1,500 ÷ 3 = 500 kWh. At €0.22/kWh the illustrative energy costs are €330 versus €110, a €220 difference for that season. Installation, servicing and the actual seasonal COP remain to be considered.
- Estimate the building or room heat demand and decide whether the comparison is room heating or a whole-home system.
- Get installed prices including electrical changes and compare performance at the local design temperature, not only a nominal COP.
Decision: For prolonged heating, a properly sized heat pump may offset its installation cost over time; for rare short use, a portable resistance heater may have a lower total cost.
A seasonal COP of 3 is an assumption, not a promise for your climate. Heating demand and actual installation cost decide real savings.
Compare it with your own numbers
Use annual useful-heat estimates and an achievable seasonal COP to calculate electricity use before comparing installed quotes.
Decision checklist
Estimate heat demand. Insulation, infiltration and comfort temperature determine required heat.
Use seasonal efficiency. Compare SCOP and actual operating conditions instead of peak COP.
Account for installation. Include outdoor-unit location, drainage, electrics, noise and permission.
Calculate usage period. A low-hour guest room has a different payback from an all-day living space.
When each heating option can be appropriate
Direct electric heating converts electricity to heat at the point of use, while a heat pump moves heat and can provide more heat output per kWh of electricity.
Electric radiator
- Can suit occasional use, small rooms or spaces where a larger installation is not justified.
- Purchase and installation are usually straightforward.
- Running cost is closely tied to the electricity consumed.
Heat pump
- Often becomes more attractive with many hours of heating or cooling use.
- Efficiency changes with outdoor temperature and operating conditions.
- Requires higher upfront cost, suitable installation and maintenance.
Compare real operating hours and heating demand, not just the rated electrical power of the equipment.
Frequently asked questions
Which is better: Electric radiator or Heat pump?
There is no universal winner. The first option may suit you if you need simple, occasional point heating with low installation complexity. The alternative may suit you if you heat regularly and want to move more heat per kWh of electricity through a suitable heat-pump system.
Should I decide only by purchase price?
No. A higher initial heat-pump cost can be offset by lower seasonal energy consumption in frequent use, but savings depend on actual demand, SCOP and installation.
What should I check before buying?
A resistance heater converts electricity to heat roughly one-for-one at the appliance. A heat pump can deliver several units of heat per unit of electricity, but performance changes with conditions.