Fan Assisted Radiators Cost: 2026 UK Price Guide

Fan assisted radiators (also called fan convectors or active radiators) use a small built-in fan to force air across the heat exchanger, significantly increasing heat output compared to a passive radiator of the same dimensions. In the UK in 2026, a single unit costs £150–£600 to supply and £350–£900 fully installed. They are most commonly installed in homes switching to heat pump heating, where flow temperatures are lower than a conventional gas boiler and standard radiators may be undersized.¹

For homes with air source or ground source heat pumps, fan assisted radiators can be the difference between a comfortable home and an underheated one, without the disruption and cost of replacing every radiator.

How Fan Assisted Radiators Work

A standard (passive) radiator heats a room primarily by convection, air warms naturally at the radiator surface and rises, creating a slow circulation. A fan assisted radiator adds a low-wattage fan (typically 3–20 W) that draws cool air across the fins continuously, dramatically increasing the rate of heat transfer.

The practical effect is more heat from the same size of radiator at a low flow temperature. Myson, for example, states that its Ulow-E2 uses in-built fans to produce heat outputs up to 60% more than traditional radiators.² This matters because:

• Heat pumps run more efficiently the lower the flow temperature, so a system that can heat the house at around 45°C or below will usually achieve a better Coefficient of Performance (COP) than one forced up to 55°C or more
• Old homes with undersized radiators cannot always be upgraded with larger panels due to space constraints; fan assisted units solve this in the existing footprint

The fans operate quietly at low speed during normal heating, and a well-designed unit is typically quoted at around 25–35 dB(A), comparable to a library or quiet office. At full speed, noise typically rises to 40–50 dB(A).

Unit and Installation Costs

Supply-only prices (2026)

Installed costs (inc. VAT, labour, and materials)

Installation requires a plumber or heating engineer. The fan element needs a mains electrical connection (the fan runs on 230V or low-voltage 12/24V depending on model), a qualified electrician must connect this if it involves new wiring. Most units are designed for a simple spur from a nearby socket circuit.

Labour rates for heating engineers in the UK run £45–£75/hour in 2026 (£70–£110/hour in London), with a swap-out taking 2–3 hours and a new installation taking 3–5 hours.

Energy Savings and Payback

The energy saving from fan assisted radiators is indirect, it comes from allowing your heat pump (or condensing boiler) to operate at lower flow temperatures, which improves system efficiency.

For heat pump users: reducing flow temperature from 55°C to 45°C typically improves SCOP by 0.3–0.7. For a home using 15,000 kWh of heat per year with electricity at 26.32p/kWh, the capped unit rate for 1 October to 31 December 2026:⁴

• At SCOP 2.8 (55°C flow): ~5,360 kWh electricity = £1,410/year
• At SCOP 3.4 (45°C flow): ~4,410 kWh electricity = £1,161/year
• Annual saving: ~£249

At this saving rate, a whole-house installation of 6 fan assisted radiators at £450 each installed (total £2,700) pays back in roughly 11 years. The payback is faster if electricity prices rise, if the home is poorly insulated and previously required high flow temperatures, or if the heat pump system is oversized (running at low load, where lower flow temperatures benefit efficiency most).

For gas boiler users: the energy saving is more modest, a condensing boiler already achieves high efficiency at 55°C flow; reducing to 45°C offers a marginal improvement. Fan assisted radiators are rarely cost-justified for gas heating alone.

Comparison: Fan Assisted vs Standard Radiators

For a home installing a new heat pump, the upfront cost comparison is relevant: fitting fan assisted radiators is typically cheaper than upsizing every standard radiator (which may also require new pipe runs if the old radiators were sized for 70°C+). Get a heat loss calculation done first, it will show which rooms need additional output and which existing radiators are adequate.

Grants and Financial Support

Boiler Upgrade Scheme (BUS): the £7,500 grant for an air source or ground source heat pump covers the heat pump unit and core installation but does not specifically ring-fence funding for radiator upgrades.⁵ However, a MCS-certified installer who includes fan assisted radiators as part of a heat pump installation package may include them in the overall quoted cost covered by the grant. Confirm this with the installer before signing a contract.

Great British Insulation Scheme (GBIS) and ECO4: GBIS closed on 31 March 2026 and is no longer taking applications,⁶ and ECO4 runs only to 31 December 2026.⁷ ECO4 funds measures such as insulation or heating upgrades for low-income, fuel-poor and vulnerable households, rather than radiator upgrades on their own.⁷

Local authority schemes: some councils in England operate discretionary warm homes funds that can support heating upgrades for low-income households. Eligibility varies, check your council’s website or call the government’s Find Ways to Save Energy in Your Home helpline on 0800 098 7950.⁸

Heat pump tariffs: switching to a time-of-use electricity tariff designed for heat pump users (such as those offering off-peak overnight rates) can meaningfully reduce running costs and improve the financial case for the whole system upgrade, including fan assisted radiators.

Pros and Cons

Advantages:

• Significantly higher heat output per radiator compared to equivalent passive panel at low flow temperatures
• Enables heat pump systems to run efficiently without oversizing every radiator
• Fast warm-up response time, as the fan moves warm air into the room faster than passive convection
• Smaller footprint than an equivalent output standard radiator (useful in small rooms or hallways)
• Compatible with existing wet central heating pipework in most cases

Disadvantages:

• Higher purchase cost than equivalent passive radiator
• Requires electrical connection, adds to installation cost and means the radiator draws a small amount of electricity even at low fan speeds
• Fan noise, though low, is audible in quiet rooms, a consideration for bedrooms
• More components to potentially fail (fan motor, electronic controls)
• No financial benefit in gas-heated homes without heat pumps

Do You Need All Radiators Upgraded?

A whole-house swap-out is rarely necessary. A competent heating engineer or MCS installer will carry out a room-by-room heat loss calculation and identify which rooms are undersupplied at your target flow temperature. Typically, 2–4 radiators in the largest or poorly-orientated rooms need upgrading; the rest can remain as standard panels. Prioritise:

• Living rooms and open-plan kitchen/diners (high heat demand, often existing radiators are borderline)
• Bathrooms (towel rails are notoriously poor at low flow temperatures, a fan convector under a bath panel or a fan-assisted towel rail is a common solution)
• Rooms with single-glazed windows or poor insulation (higher heat loss means higher demand)

A professional heat loss survey costs £150–£400 for a full property assessment and is essential before any heating system upgrade. Many MCS-certified heat pump installers include this in their survey cost.