London
10 Best HVAC Companies in London
This London shortlist covers air-conditioning contractors, heating specialists and broader HVAC providers. Use it to narrow your choice by project type, from a single home installation or boiler fault to commercial heating support and heat-pump work.
How this guide is ordered
Searching for HVAC companies in London should be easy. So we looked for proven expertise, happy clients, contact details you can rely on and a convenient part of town.
Some listings belong to businesses that have paid for added exposure on the site.
Full list
10 Heating and Cooling Companies in London Compared
All Star Air Conditioning
All Star Air Conditioning provides online estimates, on-site services and repairs for domestic air-conditioning projects. It suits households needing installation advice, replacement units or repairs, including properties with awkward access or limited space. Consultations may take place by video call or in person, and installations are described as efficient, clean and carefully planned.
Stands out: Video consultations are available alongside in-person surveys
Home air-conditioning installation and repairProperties needing advice on unit placement or configuration105 Eade Rd, Harringay Warehouse District, London N4 1TJ, United KingdomHeat Knights Boiler Repair London
Open 24 hours
Heat Knights Boiler Repair London is a heating contractor providing boiler repairs, on-site services and online estimates. It also handles boiler installations and servicing, with experience described across domestic and commercial heating systems. The business suits customers needing diagnosis, repair or replacement work, particularly where clear communication and tidy, prompt engineering matter.
Stands out: The service covers both domestic and commercial boiler problems
Households needing boiler repair, servicing or replacementBusinesses seeking help with commercial boiler systems3, Heat Knights Boiler Repair London, Omega Works, Harringay Warehouse District, London N4 1LZ, United KingdomHeatpumps London
Heatpumps London provides heat pump training for heating engineers and others seeking practical knowledge of the technology. Courses cover system design, installation, commissioning, fault finding and safety, combining theory with hands-on techniques, real-world examples and live demonstrations. Level 1 training provides a foundation in operation and installation basics.
Stands out: Training focused on Daikin air source heat pumps
Heating engineers building heat pump skillsLearners seeking practical installation and commissioning knowledgeUnit 2, Heatpumps London, Bittacy Business Centre, Bittacy Hill, Mill Hill East, London NW7 1BA, United KingdomCapCool Air Conditioning & Refrigeration Specialists
CapCool Air Conditioning & Refrigeration Specialists handles air-conditioning work for homes and commercial premises, including complex repairs, new installations and correcting poor previous installations. It suits customers who want a clearly explained quotation and an organised installation process. The business is repeatedly described as responsive, tidy and efficient, with projects ranging from supplying and fitting a unit to commercial installations.
Stands out: Can diagnose and rectify issues from shoddy previous installations
Air-conditioning repairs and new installationsCommercial projects requiring preparation and coordinationUnit 24, CapCool Air Conditioning & Refrigeration Specialists, Wadsworth Business Centre, CapCool, 21 Wadsworth Rd, London UB6 7LQ, United KingdomDebonair Cooling
Debonair Cooling is an air-conditioning contractor handling tailored installations for homes. Its work includes single units, multi-split systems and installations involving indoor and outdoor units, with guidance on operation, remotes and mobile apps. The service suits homeowners who value careful preparation, protected furnishings, tidy finishes and clear communication throughout the installation.
Stands out: Installation advice tailored to individual rooms and homes
Home air-conditioning installationsSingle-unit and multi-split systemsOffice 105, Debonair Cooling, Atlas Business Centre, Oxgate Ln, London NW2 7HJ, United KingdomSmartHeat London
Open 24 hours
SmartHeat London is a heating contractor handling boiler servicing and central-heating problems. It suits customers who need a responsive, clearly explained repair or annual boiler service, with reported attention to safety, cleanliness and transparent pricing.
Stands out: Work has included thorough safety checks and clear explanations
Central-heating repairsAnnual boiler servicingCustomers who value clear explanations and tidy work142 Powys Ln, Arnos Grove, London N13 4HN, United KingdomWarm and Cool London
Open 24 hours
Warm and Cool London is a heating contractor providing on-site services for boilers, heating systems and heat pumps. It suits households needing boiler inspections, repairs, underfloor-heating work or an air-source heat pump installation. The business is described as giving clear explanations and written reports, with work ranging from temporary heating fixes to consultation, design and delivery of a heat-pump system.
Stands out: Covering both conventional heating work and air-source heat-pump projects
Households needing boiler servicing, heating repairs or heat-pump supportThe Vineyards, 36 Gloucester Ave., London NW1 7BB, United KingdomThe DC Group UK
Open 24 hours
The DC Group UK is a heating contractor offering online estimates, on-site services and repairs. Its documented work includes boiler servicing and fault investigation, with engineers explaining findings and discussing repair options in accessible language. It suits households needing routine boiler checks or help with a heating fault.
Stands out: Engineers explain boiler findings and repair options clearly
Households arranging an annual boiler servicePeople needing a boiler fault investigated or repaired22 Bush Grove, London NW9 8QS, United KingdomAclima London Ltd
Aclima London Ltd installs air-conditioning systems for homes and community buildings. It suits customers planning multi-unit installations who value clear explanations, punctual project work and a neat finish. The team is described as handling installations efficiently, completing agreed work within the expected timeline and leaving premises clean and tidy.
Stands out: Explains installation options clearly before work begins
Homeowners planning air-conditioning installationCommunity buildings needing multiple air-conditioning units129 Station Rd, London NW4 4NJ, United KingdomAza & Sons Services
Aza & Sons Services is a family-run London company covering plumbing, heating, gas and air-conditioning work. It provides repair services and online estimates, with examples including boiler servicing, boiler fault checks, AC repairs, pipe leaks and washing-machine installation. Clear explanations, transparent pricing and a safety-conscious approach suit households wanting practical, understandable engineering support.
Stands out: Covers plumbing, heating, gas and AC services
Households needing plumbing, boiler or AC repairsCustomers seeking clear explanations before work begins
Each number on the map is a business in the list.
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HVAC services covered by these London businesses
- Air-conditioning installationCompare providers for single units, multi-split systems, indoor and outdoor units, or installations across homes and community buildings.
- Air-conditioning repairSome listed contractors handle complex faults, replacement units and problems linked to earlier installations.
- Boiler repair and servicingHeating contractors cover fault investigation, annual servicing, diagnosis, repair and replacement for domestic systems.
- Heat-pump supportWarm and Cool London describes air-source heat-pump consultation, design and delivery, while Heatpumps London focuses on engineer training.
How to choose an HVAC company for your home
- Match the provider to the jobStart with the exact requirement: domestic air conditioning, a boiler fault, annual servicing, commercial heating or a heat-pump project.
- Ask about the survey formatOnline estimates, video consultations and on-site services are described for some businesses; check which approach is available for your property.
- Discuss access and layoutAwkward access, limited space and room-by-room unit placement can affect planning, so raise these details before accepting a proposal.
- Clarify the finish and explanationIf protected furnishings, tidy work, clear quotations or written reports matter, choose a provider whose supplied description addresses that priority.
Frequently asked questions
Which listed businesses focus on domestic air conditioning?
Debonair Cooling, All Star Air Conditioning, CapCool Air Conditioning & Refrigeration Specialists and Aclima London Ltd all describe domestic air-conditioning work.
Can I find boiler repair and servicing providers here?
Yes. Heat Knights Boiler Repair London, The DC Group UK and SmartHeat London describe boiler repair or servicing, while Warm and Cool London also covers heating systems.
Is Heatpumps London a domestic installer?
The supplied evidence describes Heatpumps London as a training provider for heating engineers, not as a domestic heating installation service.
Do any businesses offer online estimates?
All Star Air Conditioning, Heat Knights Boiler Repair London, The DC Group UK and Aza & Sons Services describe online estimates; availability should be confirmed directly.
