A hybrid heat pump is an air-to-water heat pump installed alongside an existing gas, LPG or oil boiler, with a controller that decides which one supplies heat at any moment. Typically the heat pump covers mild and moderate weather, and the boiler takes over or helps on the coldest days, or whenever it is cheaper to run on the prices entered into the controller.
Larger, older houses in County Durham that would need a very big heat pump may suit a hybrid while insulation is improved. For County Durham homes with a boiler that is still fairly new, a hybrid lets a heat pump take on much of the heating now. In County Durham, the outdoor unit of a hybrid needs the same airflow and siting care as any heat pump.
Who it suits
- Large or hard-to-insulate homes where a full heat pump is difficult for now
- Combi homes with no room for a cylinder
- Homes with a fairly new boiler the owner wants to keep using
- Owners who want a stepping stone towards a full heat pump later
Grants and rules for heat pumps in England
Homes in County Durham 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.
Hybrid heat pumps prices in County Durham
Here are typical prices for hybrid heat pumps in County Durham, installed and including VAT. Use the guide price tool for a figure based on your home, then a survey confirms it in writing.
| System | Installed guide price |
|---|---|
| Hybrid heat pump alongside an existing boiler | £6,800–£10,650 |
Installed, inc VAT. Hybrid systems are not eligible for the Boiler Upgrade Scheme.
Towns we cover in County Durham
We cover 14 towns in County Durham for hybrid heat pumps. Each links to local guide prices and the grant position for England.
| Town | Postcode district | Nearest town | Midwinter daylight |
|---|---|---|---|
| Darlington | DL1 | Newton Aycliffe | 7 h 16 min |
| Hartlepool | TS26 | Peterlee | 7 h 14 min |
| Stockton-on-Tees | TS18 | Billingham | 7 h 15 min |
| Durham | DH1 | Chester-le-Street | 7 h 13 min |
| Chester-le-Street | DH2 | Stanley | 7 h 12 min |
| Billingham | TS23 | Stockton-on-Tees | 7 h 15 min |
| Stanley | DH9 | Chester-le-Street | 7 h 12 min |
| Consett | DH8 | Stanley | 7 h 12 min |
| Newton Aycliffe | DL5 | Bishop Auckland | 7 h 15 min |
| Bishop Auckland | DL14 | Newton Aycliffe | 7 h 14 min |
| Seaham | SR7 | Peterlee | 7 h 12 min |
| Peterlee | SR8 | Seaham | 7 h 13 min |
| Barnard Castle | DL12 | Bishop Auckland | 7 h 16 min |
| Sedgefield | TS21 | Newton Aycliffe | 7 h 14 min |
Hybrid heat pumps questions
Will a hybrid heat pump lower my bills?
It can reduce how much gas, LPG or oil you burn, but the effect depends on how the controller is set, your insulation, your tariff and fuel prices. You keep a boiler to service and, on mains gas, the standing charge. We do not promise a figure; instead the survey gives an estimate for your home comparing a hybrid with a full heat pump.
Do I still need to service my boiler with a hybrid?
Yes. The boiler still needs its annual service, by a registered gas engineer for gas or LPG or an oil technician for oil, and the heat pump needs its own annual service, which is often a condition of the manufacturer's warranty. Two heat sources mean slightly more maintenance than either a boiler or a heat pump on its own.
Can I get the Boiler Upgrade Scheme grant for a hybrid heat pump?
No. In England and Wales hybrid systems are not eligible for the Boiler Upgrade Scheme, because the scheme requires the heat pump to meet the home's full heating and hot water needs on its own. If a grant matters to your budget, a full air-to-water heat pump is the option that can qualify. In Scotland and Northern Ireland we check at survey what, if any, funding applies.
Can a hybrid work with my combi boiler?
Yes, some hybrids are designed to work with a combi, with the heat pump heating the radiators and the combi continuing to provide hot water on demand. That avoids finding space for a cylinder, which is one of the main reasons people choose a hybrid. Other hybrid designs use a cylinder heated by the heat pump, with the boiler as backup.