Business Details
9 Years
experience
Emergency
services
Trusted HVAC Contractors in London
Established in 2017, Greenheat Uk is a leading manufacturer-authorised Keston Boiler service provider in London and the South East. With over 150 years of combined engineering experience, we specialise in boiler repairs, servicing, and installations for domestic and commercial clients. Our team of Gas Safe-registered engineers maintains the largest stock of Keston boiler spares in the UK, ensuring swift resolutions for both current and legacy models.We offer annual service contracts, emergency breakdown support, and commercial plantroom solutions, alongside expanded services in plumbing, electrical work, and smart home technology. Our commitment to quality is reinforced by partnerships with Calor Gas and manufacturer accreditations, ensuring reliable, future-proof heating solutions for all property types.
Services
Boiler servicing
Emergency repairs
Commercial installations
LPG conversions
Smart controls
Plantroom upgrades
Gas safety certificates
Details
- Year established: 2017
Highlights and features
- We operate a team with 150+ years of combined Keston boiler engineering experience
- We maintain the UK's largest stock of Keston boiler spare parts for immediate repairs
- Our engineers provide 24/7 emergency breakdown cover for urgent heating issues
- All engineers are Gas Safe registered with specialist training on Keston boilers
- We offer complete plantroom design and LPG conversion solutions alongside boiler services
Associations and certifications
- Gas Safe Register
- Calor Gas Installer Community
What people say
Outstanding service
Knowledgeable and skillful
Superb
Record time
Preemptive action
Services
Boiler servicing
Our annual boiler servicing ensures optimal performance and longevity for Keston and Ideal Commercial boilers. Engineers conduct comprehensive safety checks, clean critical components, and identify potential issues before they escalate. With the UK's largest stock of genuine Keston spares, we complete 95% of services during the initial visit, maintaining manufacturer warranties and gas safety compliance for domestic and commercial properties.
Emergency repairs
Available 24/7 for urgent heating failures, our rapid-response engineers resolve boiler breakdowns using immediate spare parts access. We prioritise same-day call-outs across London and the South East, with 85% of emergency repairs completed within four hours. Our Gas Safe-registered team handles all Keston models, including legacy systems, minimising downtime for residential and commercial clients during critical heating failures.
Commercial installations
We design and install commercial heating systems up to 1.8MW capacity, specialising in Keston Heat and Ideal Evomax boilers. Our engineers create cascade systems with flexible flue options, integrating pressure vessels, dosing pots, and smart controls. With expertise in retrofitting dated plantrooms, we modernise systems for improved efficiency while maintaining compatibility with existing infrastructure across large residential, institutional, and commercial buildings.
LPG conversions
As Calor Gas Installer Community members, we provide complete LPG boiler solutions for rural properties. Our engineers handle tank positioning, BioLPG compatibility, and smart thermostat integration. We offer 40% renewable energy plans using certified BioLPG, reducing carbon emissions by 38% compared to oil. All installations include telemetry monitoring for automatic gas level top-ups and safety shut-off systems for enhanced security.
Smart controls
Our Smartplant system integrates Honeywell, Deltadore, and Flamco technologies for remote heating management. Features include leak detection with automatic shut-off, gas safety monitoring, and energy usage analytics accessible via mobile apps. We install voice-controlled thermostats, smart radiator valves, and plantroom surveillance systems, reducing annual energy costs by up to 25% through precise temperature regulation and predictive maintenance alerts.
Questions
Do you service boilers outside London?
We cover the entire South East region, with emergency call-outs available nationwide for Keston boiler specialists.
Can you repair older Keston boiler models?
Yes, we maintain and repair all legacy Keston models including K50, K80, and Celsius series using our extensive spare parts inventory.
Are your engineers qualified for commercial gas work?
All engineers hold Gas Safe commercial qualifications with specific accreditation for boilers up to 1.8MW capacity.
Do you offer payment plans for boiler replacements?
We provide flexible financing options for new boiler installations with approved credit agreements.
Can you install smart controls with existing boilers?
Yes, we retrofit smart thermostats and TRVs to existing Keston systems for improved energy efficiency.
What's included in your annual service contract?
Our contracts include yearly safety checks, priority emergency cover, and waived call-out fees for boiler-related issues.
Reviews (3)
David Leathem
Feb 27, 2018
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Philip Spence turned up, at the appointed time, with a telephone heads-up from Mandy, who seems to run things (and very efficiently, too). He completed the repair in 45 minutes, with a level of confidence that any customer would appreciate. Good job; regards, David
Emma Quansah
Oct 27, 2017
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Our engineer James was absolutely fantastic, very professional, answered all our questions and worked efficiently, which was a refreshing change from other companies we have used in the past.
Ray Watkins
May 25, 2017
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Service brilliant couldn't ask for better, from start to finish all work was carried out in a very professional manner.
