Recommended installers / London & South East / Warm & Cool London
Air conditioning, heat pump and Vaillant boiler specialists from Primrose Hill, F-Gas accredited and Heat Geek Elite, working with London homes and businesses.
Our recommended installer
Looking for an air conditioning, heat pump or boiler installer in Central or North London? We recommend Warm & Cool London. They are F-Gas accredited for air conditioning, Heat Geek Elite installers for heat pumps and Vaillant Advance installers for boilers.
Warm & Cool London are based in Primrose Hill and work across Central and North London, from Camden and Hampstead to Kensington and Marylebone. Run by Hilton Shaw, the business started out as Quantum Gas Engineering and became Warm & Cool London as it moved into air conditioning and heat pumps.
The same team installs and services air conditioning for homes, offices and shops, and designs every heat pump around a room-by-room heat loss calculation, using Heat Geek's ZeroDisrupt approach. For boilers, they only fit Vaillant.
Reviews
Services
Air conditioning, heat pumps and Vaillant boilers, all from one London team.
Daikin, Toshiba and Mitsubishi Heavy Industries air conditioning for homes, offices and shops.
See the air conVaillant, Viessmann and Stiebel Eltron heat pumps, designed room by room by Heat Geek Elite engineers.
See the heat pumpsVaillant boilers only, fitted by Vaillant Advance installers with extended guarantees.
See the boilersThey guide you through the £7,500 heat pump grant and check your system qualifies.
See the grantAir conditioning
Air conditioning is a big part of what Warm & Cool London do. They fit Daikin, Toshiba and Mitsubishi Heavy Industries systems for London homes, apartments and workplaces, backed by up to a 5 year manufacturer warranty when they install them.
Mitsubishi Heavy Industries
Quiet, efficient air conditioning for bedrooms, living rooms and home offices, with a sleek matte finish in white, silver or black wood.
Toshiba
A stylish, efficient system for modern homes, apartments and workspaces where quiet performance matters.
Daikin
Premium air conditioning with a sleek finish and excellent comfort control, for homes that want a modern, minimal look.
They also fit and service air conditioning for offices, shops and cafés, from single rooms to multi room systems. Exact models are confirmed in your quote.
Heat pumps
Warm & Cool London specialise in Vaillant aroTHERM plus heat pumps, and also fit the Viessmann Vitocal 150-A and the Stiebel Eltron HPA-O.
Vaillant
Vaillant's monobloc heat pump, using natural R290 refrigerant, in a range of outputs to suit different sizes of London home.
Viessmann
A smart, efficient heat pump for heating and hot water, with simple app-based control.
Stiebel Eltron
An exceptionally quiet, German-engineered heat pump using natural refrigerant.
Exact models, sizes and guarantees are confirmed in your quote. See the funding options →
Heat pump funding in England
Warm & Cool London guide you through the Boiler Upgrade Scheme application and make sure your system qualifies, so the grant comes straight off your quote.
Off the cost of an air source or ground source heat pump that replaces fossil fuel heating.
Extra for homes heated by oil or LPG with no mains gas, taking the grant to £9,000. Available until March 2027.
Heat pumps installed in homes are zero-rated for VAT until March 2027.
You don't need to be on benefits. Homeowners, landlords, second home owners and businesses can all qualify.
| System | Standard grant | Oil or LPG, no mains gas |
|---|---|---|
| Air source heat pump | £7,500 | £9,000 |
| Ground source heat pump | £7,500 | £9,000 |
| Air-to-air heat pump | £2,500 | £2,500 |
The extra £1,500 is available until March 2027. One grant per property. Limits apply: 45kWth for a single system and 70kWth for more than one heat pump.
Warm & Cool London survey your home, work out its heat loss and give you a written quote with the grant shown on it.
Warm & Cool London apply to Ofgem for the grant on your behalf.
Ofgem contact you to check Warm & Cool London are acting for you. Reply to confirm.
The heat pump is installed and commissioned within 120 days of applying, and the grant is taken off what you pay.
Figures from GOV.UK (Boiler Upgrade Scheme), checked November 2026. Scotland has its own scheme through Home Energy Scotland.
Boilers
Warm & Cool London only fit Vaillant boilers. As Vaillant Advance installers, they can offer extended guarantees of up to 10 years, depending on the model.
Vaillant
A compact Vaillant boiler, ideal where space is limited, with flexible installation options for smaller cupboards.
Vaillant
A reliable combi for small to medium homes, with no need for a separate hot water cylinder.
Vaillant
Vaillant's premium combi range, for homes that need strong performance and efficiency.
Recent jobs
A few recent air conditioning, heat pump and boiler jobs, taken from Warm & Cool London's own website.
London
This homeowner wanted quiet, fast cooling and efficient heating without an industrial-looking unit. Warm & Cool London fitted a Toshiba Haori with a dark textile finish to match the room, and a compact outdoor unit on the roof terrace.
Central London
A fashion boutique needed quiet, efficient cooling and heating that suited its coffered ceilings and lighting. The team fitted a brushed gunmetal AUX DC Inverter wall unit, then commissioned it without disrupting trading.
London
Vaillant air source heat pumps installed for a London homeowner, designed and fitted by Warm & Cool London's Heat Geek Elite engineers.
London
A new Vaillant ecoTEC plus combi for a London homeowner, fitted by Vaillant Advance installers and backed by a 10 year guarantee.
Accreditations
These are the accreditations Warm & Cool London hold, as listed on their own website.
F-Gas accredited
Heat Geek Elite
Vaillant Advance installers
Gas Safe registeredFAQs
Yes, it's one of their main services. They fit Daikin, Toshiba and Mitsubishi Heavy Industries air conditioning for homes, apartments, offices and shops across London. They're F-Gas accredited, and they service and repair air conditioning too.
Warm & Cool London are based in Primrose Hill and cover Central and North London, including Camden, Hampstead, Islington, Highgate, Kensington, Marylebone and Notting Hill. If you're not sure your area is covered, just ask in the form.
Yes. Warm & Cool London are Heat Geek Elite heat pump installers. Every system starts with a room-by-room heat loss calculation, and they design heat pumps using Heat Geek's ZeroDisrupt approach, which keeps the system simple and sized for your home.
If your home qualifies, yes. The Boiler Upgrade Scheme gives £7,500 off an air source heat pump in England and Wales, or £9,000 if your home is heated by oil or LPG with no mains gas, until March 2027. Warm & Cool London guide you through the application and check your system qualifies.
Only Vaillant. As Vaillant Advance installers, Warm & Cool London can offer extended guarantees of up to 10 years, depending on the model, and they service Vaillant boilers too.
Get in touch
Tell us a little about what you need and we will pass your details straight to Warm & Cool London. They will be in touch to talk it through and arrange a survey.
We only recommend installers we know and work with. Warm & Cool London carry out the survey, quote and installation, and your contract is with them.
Visit the Warm & Cool London websiteMore recommended installers
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Latest from Warm & Cool London
Recent air conditioning, heat pump and boiler jobs from the team on social media.