Replacing an oil boiler, LPG boiler, storage heaters or electric heating with a heat pump doesn't automatically mean replacing every radiator or ripping out your pipework. Modern system design and intelligent controls make heat pumps a genuine option for more existing homes — and government grants can take a large bite out of the upfront cost.
These are the four objections that stop most people before they start. None of them is the automatic "no" it's usually presented as.
“Will I need all new radiators?”
Not necessarily.
“Is my existing pipework too small?”
Not necessarily.
“What if I have no space for a cylinder?”
A compact heat battery could be the answer.
“What about the upfront cost?”
There may be more help than you think.
One of the biggest misconceptions about heat pumps is that every radiator automatically has to go. Whether radiators need changing depends on the property, its heat loss, the radiators already there and how the new system is designed and operated.
Adia Thermal has developed a heat-pump control platform intended to improve performance with existing heating systems. Rather than assuming every radiator needs replacing, flow balancing valves fitted to the existing valve bodies can modulate individual radiator output, ambient sensors monitor each room, and the Adia Hub balances the system.
Every home is different. A proper heat-loss assessment and system design are still required, and some properties will benefit from upgrading individual radiators. The point is that replacing all of them shouldn't be assumed before the home has been assessed.
Existing pipework doesn't automatically rule out a heat pump either. Traditional designs sometimes lead to recommendations for larger pipework because heat pumps operate differently from fossil-fuel boilers — but modern system design and controls offer other approaches.
The Adia Hub is a pre-plumbed interface between the heat pump and the home's existing heating circuit, using hydraulic separation, a secondary pump and intelligent controls. According to Adia Thermal's installer information, it is designed to work with existing radiators and pipework, including mixed-bore pipework and legacy radiators.
Every installation remains subject to survey, heat-loss calculation, hydraulic assessment and system design.
A heat pump doesn't have to mean finding room for a bulky hot water tank. Sunamp Thermino heat batteries store hot water in a far smaller footprint than a traditional cylinder — they can fit a standard cupboard, an understairs space or a utility area that would never take a conventional tank.
They're modular too, so units can be linked to match the hot water demand of anything from a small flat to a larger family home, and they carry a 10-year guarantee.
Whether a heat battery suits your property depends on hot water demand, available space and system design. An assessment is always required first.
The headline price isn't necessarily what you fund yourself. For off-gas-grid oil and LPG homes, the Boiler Upgrade Scheme can take a substantial amount off the top.
Example only. Prices from £14,000 are illustrative starting prices, subject to survey, property requirements and final system design; £5,000 is not a guaranteed customer price. The £9,000 grant applies to qualifying off-gas-grid oil or LPG properties in England and Wales and is currently available until 31 March 2027 — other eligible properties receive different amounts. The grant is normally applied for by an MCS-certified installer on the homeowner's behalf. Check the scheme on GOV.UK or read our Boiler Upgrade Scheme guide.
Prefer to spread the remaining balance? Finance is available through Novuna Personal Finance, subject to status and a credit check, with a minimum deposit and a 14-day cooling-off period. The terms, APRs and full representative examples are on our finance page, where you can also work out a monthly figure.
Across England and Wales about 3.5% of homes heat with oil. In the pockets below it runs several times that. These are the places inside our patch where we actually meet oil tanks and LPG bottles — so if you are in one of them, you are not an odd case, you are the local norm.
Scarisbrick, Halsall, Haskayne, Downholland Cross, Barton, Shirdley Hill
Scarisbrick, Halsall & Haskayne MSOA — 3,214 households
Ormskirk town and Aughton are 76–88% mains gas; this is the mossland fringe, not the town.
Bickerstaffe, Newburgh, Lathom
Bickerstaffe & Newburgh MSOA — 2,385 households
The highest off-grid rate in West Lancashire — scattered farmhouses on generous plots.
Kingsley, Norley, Crowton, Manley, Alvanley, Delamere edge
WA6 8 sector — Census 2021 TS046 weighted by live postcodes
Frodsham and Helsby town centres are on the main; the sandstone-ridge villages are not.
Rufford, Holmeswood, Mere Brow fringe
Rufford & Banks MSOA — 3,501 households
Burscough town itself has more gas meters than properties — fully on the main.
Burton, Puddington, Ness, Windle Hill, Little Neston fringe
CH64 district — 643 live postcodes, 8,427 households, OA-weighted
Neston and Parkgate themselves are largely on gas; the oil sits in the rural west.
Brimstage, Thornton Hough, Raby, Raby Mere, Storeton
Rural CH63 sectors — 69 of 822 postcodes classed rural
Bebington and Spital dominate the district average and are suburban mains gas.
We would rather say so than sell you one. These are all on our coverage list and we work in every one of them — but for an off-grid proposition specifically, the numbers do not support it:
On mains gas, a new A-rated boiler is usually the better-value swap — see new boiler installations or our current prices.
Figures: Census 2021 table TS046 (central heating type) and the Department for Energy Security & Net Zero’s sub-national estimates of properties not connected to the gas network, 2024 release. Each percentage describes the small area named beside it, not the whole postcode district.
The Boiler Upgrade Scheme pays £7,500 towards an air source heat pump in England and Wales. Homes with no mains gas connection that heat with oil or LPG can claim a further £1,500 until March 2027 — £9,000 in total. It is claimed by an MCS-certified installer, which is us, so it comes off your quoted price rather than arriving in your bank.
Answer both and we’ll tell you which grant your property is likely to fall under.
A heat-loss assessment and system design tell you what your property really needs — not what a rule of thumb assumes. Book a survey and we'll give you a straight answer.
Or try our running-cost calculator to compare a heat pump against what you spend now.