A heat pump radiator upgrade means replacing only the radiators that are too small to heat their room at the lower water temperatures a heat pump runs at. A gas boiler usually sends water to radiators at 60–75°C, while a well-designed heat pump system typically runs at around 35–50°C. Cooler water gives out less heat from the same radiator, so some rooms need more radiator surface to stay comfortable.
In Gloucestershire, bay-windowed front rooms are often the rooms that need a larger radiator when moving to a heat pump. We plan radiator upgrades in Gloucestershire so floorboards are lifted only where pipework genuinely needs changing. Many older houses in Gloucestershire still have their original single-panel radiators, so the survey checks each one against the room it heats.
Who it suits
- Rooms with little wall space, where a fan-assisted radiator fits better
- Homeowners who want the lowest practical flow temperature for efficiency
- Homes switching from a gas, oil or LPG boiler to a heat pump
- Extensions and loft conversions with large areas of glazing
Grants and rules for heat pumps in England
Homes in Gloucestershire can use the Boiler Upgrade Scheme, which takes £7,500 off the cost of an air source heat pump when it replaces fossil-fuel or electric heating. Replacing oil or LPG heating qualifies for £9,000 for installations from 21 July 2026 to 31 March 2027, and air-to-air systems for £2,500. The MCS-certified installer named in your quote applies for the grant and deducts it from the price.
Installing heat pumps is zero-rated for VAT across the UK until 31 March 2027. Since 29 May 2025, permitted development in England allows up to two air source heat pumps on a house, each up to 1.5 m³, with no blanket 1 m boundary rule — the installation must still meet the MCS planning standards, including the noise check. Listed buildings, flats and some conservation-area positions need extra consent, which we check at survey.
Heat pump radiators prices in Gloucestershire
The ranges below are typical installed prices for homes in Gloucestershire, including VAT. A survey sets the exact figure, because two similar-looking houses in Gloucestershire can need quite different radiators and pipework.
| Work | Guide price |
|---|---|
| Replacement radiator, sized for a heat pump (each, fitted) | £250–£450 |
| Upgrade of about 10 radiators | £2,000–£5,050 |
| Pipework upgrade (e.g. microbore to larger bore) | £1,500–£3,550 |
Installed, inc VAT. The survey lists which radiators need changing.
Towns we cover in Gloucestershire
We cover 12 towns in Gloucestershire for heat pump radiator upgrades. Each links to local guide prices and the grant position for England.
| Town | Postcode district | Nearest town | Midwinter daylight |
|---|---|---|---|
| Gloucester | GL1 | Cheltenham | 7 h 46 min |
| Cheltenham | GL50 | Tewkesbury | 7 h 45 min |
| Stroud | GL6 | Dursley | 7 h 47 min |
| Kingswood | BS15 | Mangotsfield | 7 h 50 min |
| Mangotsfield | BS16 | Kingswood | 7 h 50 min |
| Yate | BS37 | Mangotsfield | 7 h 49 min |
| Tewkesbury | GL20 | Cheltenham | 7 h 44 min |
| Cirencester | GL7 | Stroud | 7 h 47 min |
| Dursley | GL11 | Lydney | 7 h 48 min |
| Lydney | GL15 | Dursley | 7 h 47 min |
| Stow-on-the-Wold | GL56 | Chipping Norton | 7 h 45 min |
| Thornbury | BS35 | Yate | 7 h 48 min |
Heat pump radiator upgrades questions
Can I keep my radiators and just run the heat pump hotter?
You can, but it usually costs more to run. Every extra degree of flow temperature reduces a heat pump's efficiency, so a system designed at 55°C uses noticeably more electricity than one at 45°C for the same heat. A few well-chosen radiator upgrades often let the whole house run cooler, which is the better long-term trade.
Are fan-assisted radiators noisy?
Fan-assisted radiators make a low, steady fan sound when running at higher output, and many have quieter settings for bedrooms at night. They are useful where wall space is short, such as a kitchen with few clear walls. They need a small electrical supply, which we plan into the installation if you choose them.
Can radiators be changed without draining the whole system?
Radiator changes normally mean draining the heating system, which is why they are usually done as part of the heat pump installation. The system is then refilled, flushed, treated with inhibitor and balanced. Doing the radiators at the same time avoids draining twice and means the new radiators are commissioned with the heat pump.
Do I need new radiators for a heat pump?
Not necessarily: many homes keep most of their radiators and replace only a few. The heat loss survey checks each room against its existing radiator at the planned flow temperature. Rooms with large windows, high ceilings or extensions are the usual candidates for an upgrade, while bedrooms often need no change. Your radiator schedule lists every decision.