Air Source Heat Pump Installation in Twickenham, TW1 & TW2
EE Renewables Ltd installs MCS-certified air source heat pumps across Twickenham TW1 and TW2. Most homes here are solid brick, which raises the question everyone actually wants answered: will my radiators still work? We tell you exactly which stay and which change, at survey, before you sign anything.
Why install an air source heat pump in Twickenham?
“Will I have to replace all my radiators?” is the question we get asked most in Twickenham, and it deserves a straight answer rather than a reassuring one. A heat pump runs at a lower flow temperature than a gas boiler — typically 45 to 50°C rather than 70°C or more. A radiator putting out heat at 70°C will not deliver the same output at 45°C, so some emitters need to grow. That is the honest starting position.
Here is the part that surprises people: usually far fewer than expected. Plenty of radiators in Twickenham’s Victorian and Edwardian houses were oversized when installed, or the room’s heat loss has fallen since cavity-free walls were internally insulated and windows replaced. A proper room-by-room heat loss calculation frequently shows that most radiators are already adequate at lower temperatures, with two or three needing upsizing. Sometimes swapping a single-panel for a double is enough.
What matters is that you are told before you commit, not after. Solid brick loses more heat than cavity walls, so Twickenham’s stock genuinely needs this calculation doing properly — an installer who quotes without measuring room by room is guessing, and the guess usually surfaces as an unexpected bill halfway through or a house that never quite gets warm. We do the calculation at survey and show you the schedule: which radiators stay, which change, and what each one costs.
Beyond that, Twickenham is good territory. Semis and terraces across TW1 and TW2 generally have gardens with room to site an outdoor unit, and since May 2025 England no longer requires a one-metre boundary clearance — siting is now governed by the MCS 020(a) noise assessment instead. Richmond Council also publishes a Smarter Homes Hub with planning guidance specifically for heat pumps and solar, which is worth reading before you get quotes.
Book a free home survey with your local TW installers
Heat pump installation cost in Twickenham
Emitter work is the variable that separates a competitive Twickenham quote from a cheap one that grows later. A quote with no radiator schedule attached is incomplete — either the calculation has not been done, or the cost has been left out. The ranges below include typical radiator upgrades for solid-brick property, reflecting 2026 MCS installer pricing before and after the £7,500 Boiler Upgrade Scheme grant.
| Twickenham property type | Typical system size | Installed cost | Cost after £7,500 grant |
|---|---|---|---|
| 2-bed Victorian terrace (TW1, central Twickenham) | 5–7kW | £8,000–£10,500 | £500–£3,000 |
| 3-bed Edwardian terrace or semi (St Margarets, East Twickenham) | 7–9kW | £9,500–£12,000 | £2,000–£4,500 |
| 3-bed 1930s semi (Whitton, Strawberry Hill) | 8–10kW | £10,000–£13,000 | £2,500–£5,500 |
| 4-bed detached or riverside villa | 10–14kW | £13,000–£17,000 | £5,500–£9,500 |
Grants & benefits of installing a heat pump in Twickenham
£7,500 Boiler Upgrade Scheme grant
Twickenham homes replacing a gas boiler or electric heating qualify for £7,500 towards an air source heat pump through the Boiler Upgrade Scheme, regardless of income. We make the Ofgem application as your MCS-certified installer and deduct the grant from your invoice. Landlords can apply on properties they own, and installation — including radiator upgrades done as part of it — is zero-rated for VAT.
Bigger radiators, warmer rooms
The radiator work is worth reframing. Upsized emitters running at a steady lower temperature give more even warmth than a boiler cycling hard between hot and off, and they eliminate the cold spots that solid-brick rooms are prone to. Plenty of customers report the house feeling more comfortable at the same thermostat setting — the upgrade is a comfort improvement, not just a technical requirement.
Improve your EPC rating
Replacing a gas boiler with a heat pump generally lifts an EPC score, with the strongest gains where insulation is already reasonable. For Twickenham’s solid-brick stock, internal or external wall insulation moves the rating furthest — and reduces heat loss enough to shrink the heat pump you need. We will tell you which order makes financial sense for your property.
Cut Richmond’s largest emissions source
Richmond declared a climate emergency in July 2019 and committed to a carbon neutral council by 2030 and a net zero borough by 2043 — seven years ahead of the national target. The council’s own analysis puts domestic buildings at 46% of borough emissions, the single largest source, well ahead of transport at 24%. Home heating is not a marginal contribution here; it is the main one.
PARTNERS
Twickenham’s Octopus Energy trusted renewable energy partners
Over a decade in green home energy, MCS-approved for Vaillant UK air source heat pumps, and an Octopus Energy Trusted Partner. At the 2026 Octopus Energy Trusted Partner Awards we were named Solar & Battery Installer of the Year, selected from more than 650 partners nationwide.
The reason that matters for a solid-brick house is design quality. Octopus selects, vets and monitors its partners on installation standards and customer service, and getting flow temperatures and emitter sizing right is precisely where good and bad installations diverge. The partnership also opens the smart heat pump tariffs that decide whether running costs genuinely fall. Where existing pipework is sound, we can usually keep it.
Selected, vetted and monitored by Octopus Energy for safety, quality and customer service. Not Octopus Energy employees.
ASHP running costs and savings for Twickenham homeowners
Flow temperature is the number that decides your running cost, which is why the radiator conversation matters financially as well as practically. Under the Ofgem cap for July to September 2026, electricity costs 26.11p per kWh against 7.33p for gas. A heat pump bridges that by producing three to four units of heat per unit of electricity — but efficiency falls as flow temperature rises. A system forced to run at 55°C because the emitters are undersized costs noticeably more than the same unit running at 45°C.
That is the return on getting the radiators right. A properly designed system at a SCOP of 3.5 sits close to gas parity on a standard tariff, and moving to a specialist heat pump tariff with cheap off-peak rates takes it clearly ahead — the Energy Saving Trust puts typical annual savings at £200–£400 against gas, with the gas standing charge disappearing too if you leave the network entirely.
Insulation compounds it. A solid-brick house with internal wall insulation needs lower flow temperatures again, improving seasonal efficiency further. We model your property’s real heat demand at survey and show you the running cost figures for your home, your emitters and your tariff before you commit to anything.
EE Renewables Ltd also serves neighbouring areas such as Southall (UB), Kingston upon Thames (KT), and across South West London (SW). Homeowners in these nearby locations benefit from the same MCS-certified installations, Boiler Upgrade Scheme support, and energy-efficient heating solutions.
WHY CHOOSE EE RENEWABLES
Get an air source heat pump quote in Twickenham
Every air source heat pump quote from EE Renewables starts with a free home survey rather than an online calculator. We carry out a room-by-room heat loss calculation, give you a radiator schedule showing exactly which emitters stay and which change, run the MCS 020(a) acoustic assessment, check permitted development and conservation area status, confirm Boiler Upgrade Scheme eligibility, and give you a fixed price with no obligation.
We cover TW1 and TW2 and the surrounding areas, from central Twickenham and St Margarets to Whitton, Strawberry Hill and the riverside. Full MCS certification keeps every installation compliant and grant-eligible, and our aftercare team stays available long after commissioning.