Fan Convector Radiators for Heat Pumps

A fan convector delivers 2-3 times the heat output of a passive radiator the same size — making it possible to run your heat pump at 35°C instead of 50°C and save 20-30% on electricity bills. Here is when they make sense, what they cost, and whether the fan noise is actually a problem.

By Home Heat Pump GuidePublished: 18 March 2026

Fan convector radiator in a UK room delivering high heat output at low flow temperatures for a heat pump — Fan convectors look similar to standard radiators but deliver dramatically more heat at low flow temperatures

Fan convectors are one of the most effective solutions for rooms where wall space is limited but heat demand is high. They connect to your heat pump system just like standard radiators but use small built-in fans to dramatically increase heat output. For the full radiator picture, see our pillar: do I need new radiators for a heat pump?

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How Fan Convectors Work

A fan convector contains the same water-filled heat exchanger as a standard radiator, but adds a small electric fan that forces air across the fins. This dramatically increases the rate of heat transfer from the water to the room air. At 40°C flow, a fan convector can deliver the same output as a passive radiator running at 55°C.

Advantages for Heat Pumps

Output Comparison at 40°C Flow Temperature

Single panel (Type 11)

~250W (600x1000mm)

Double panel (Type 22)

~500W (600x1000mm)

Fan convector

~1,000W (similar size)

Approximate outputs for illustration. Actual values vary by manufacturer and model.

Noise Levels

Comfortable UK living room where a quiet fan convector provides ample warmth from a heat pump — Modern fan convectors operate at 25-35 dB on low speed — quieter than most background household noise

The most common concern. Modern fan convectors run at 25-35 dB on low speed — quieter than a fridge. On high speed, 40-45 dB. Most run on low speed the majority of the time because the heat pump delivers steady, consistent warmth rather than short blasts.

Costs

£400-£800Per unit installed

5-20WFan electricity use

2-3xOutput vs passive

25-35 dBLow speed noise

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When to Use Fan Convectors

UK hallway where a compact fan convector provides efficient heating with limited wall space — Hallways and rooms with limited wall space are ideal candidates for compact fan convectors

Rooms where wall space prevents a sufficiently large passive radiator
High heat loss rooms (living rooms, extensions with lots of glazing)
Properties where you want the lowest possible flow temperature
Retrofit projects where underfloor heating is not practical

Powering fan convectors and your heat pump with solar-generated electricity means the small fan running cost is effectively free during daylight hours.

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Includes all emitter options and the £7,500 BUS grant.

Frequently Asked Questions

Are fan convector radiators noisy?

Modern ones operate at 25-35 dB on low speed — quieter than a fridge. Most run on low speed most of the time.

How much do fan convectors cost?

£400-£800 per unit installed. More expensive but they enable lower flow temperatures, improving heat pump efficiency.

Do fan convectors need electricity?

Yes, 5-20 watts for the fans — negligible compared to efficiency gains.

Fan convector radiators are a high-performance option for heat pump systems, particularly in space-constrained rooms. They connect to radiator assessment, flow temperature optimisation, and running cost reduction. Homeowners powering their system with solar panels maximise the benefit of lower flow temperatures.