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Trusted Heating & Renewable Energy Services in Colchester
AJS Energy has been delivering expert heating and renewable energy solutions for over 40 years. Based in Colchester, we serve East Anglia with a comprehensive range of services including gas and oil heating systems, air source heat pumps, underfloor heating, and solar photovoltaic installations. Our team of Gas Safe, OFTEC, and MCS-certified engineers ensures every project meets the highest industry standards. We pride ourselves on technical excellence, customer care, and sustainable solutions that reduce carbon footprints.

Backed by 12-month workmanship guarantees and manufacturer warranties, our family-run business combines decades of experience with cutting-edge renewable technology expertise. From boiler installations to renewable energy systems, we deliver reliable, energy-efficient solutions tailored to residential needs. Our dedicated customer service team ensures prompt support, while our engineers' extensive qualifications guarantee professional service delivery across all projects.
Services
Air Source Heat Pumps Gas & Oil Heating Underfloor Heating Renewable Energy Services Solar Photovoltaics (PV)
Highlights and features
  • 40+ years of combined experience in heating and renewable energy systems
  • Gas Safe, OFTEC and MCS-certified engineers for all installations
  • 12-month workmanship guarantee on all services
  • Manufacturer warranties on all installed products
  • Specialist renewable energy grant application assistance
Associations and certifications
  • Gas Safe Register
  • OFTEC
  • MCS
What people say
Great service Reasonable price Excellent service Professional Efficiently
Services
Air Source Heat Pumps
Air source heat pumps provide low-carbon heating by extracting ambient heat from the air. Our MCS-certified installers deliver efficient systems with potential 70% carbon savings over gas boilers. Government Boiler Upgrade Scheme grants reduce installation costs by 7,500. Systems last 15-20 years with proper maintenance.
Gas & Oil Heating
Gas and oil heating solutions include boiler installations, repairs and maintenance. Our Gas Safe and OFTEC-registered engineers ensure safe, efficient operation. We offer landlord safety checks and extended warranties through manufacturer partnerships with Vaillant and Grant.
Underfloor Heating
Water-based underfloor heating systems distribute even warmth through floor surfaces. Our specialists install systems that improve energy efficiency while eliminating radiators. The solution requires professional installation to ensure optimal performance and longevity.
Solar Photovoltaics (PV)
Solar PV systems convert sunlight into electricity, reducing energy bills and grid dependency. Our MCS-certified team designs installations that maximise energy production. Excess electricity can be stored in batteries or sold back to the grid for additional savings.
Battery Storage
Battery storage solutions capture surplus solar energy for nighttime use. This reduces reliance on grid electricity and fossil fuels. Our installations integrate seamlessly with existing solar PV systems to maximise energy self-sufficiency.
People
Rob
Director
With over 40 years in the heating industry, Rob co-founded AJS Energy after gaining City & Guilds qualifications. He specialises in residential heating systems and manages business operations alongside Vanessa.
Vanessa
Director
Vanessa oversees accounts and renewable energy projects. With prior experience at Informa and local education, she ensures MCS compliance and manages collaborations with regional builders for renewable installations.
Dan
Plumbing & Heating Engineer
Gas Safe-registered engineer with five years' experience. Completed apprenticeship at Colchester Institute and qualified in air source heat pump installation. Pursuing advanced construction qualifications while serving residential clients.
Mark
Repair & Maintenance Engineer
20-year plumbing and heating specialist with Gas Safe and OFTEC certifications. Expert in air source heat pumps and solar thermal systems. Specialises in solving complex heating faults across oil, gas and renewable systems.
Jake
Plumbing & Heating Engineer
Recent Colchester Institute graduate completing apprenticeship. Joined AJS in 2023 and nearing Gas Safe registration. Focuses on developing practical skills across residential heating installations and maintenance.
Questions
What heating services do you offer in Colchester?
We provide gas and oil boiler installations, repairs and maintenance, underfloor heating systems, and renewable energy solutions including air source heat pumps and solar PV installations.
Are your engineers certified for renewable installations?
Yes, our team holds Gas Safe, OFTEC and MCS certifications, ensuring compliance with all industry standards for both traditional and renewable heating systems.
Can I get a grant for heat pump installation?
Yes, we manage applications for the government's Boiler Upgrade Scheme which provides £7,500 towards air source heat pump installations for eligible homeowners.
Do you offer warranties on heating systems?
All work carries a 12-month workmanship guarantee, with products covered by manufacturer warranties from brands like Vaillant and Grant.
How long does underfloor heating installation take?
Installation duration varies by system and property size, but our specialists typically complete residential projects within a day when working on new builds or renovations.
What areas do you cover for heating services?
We serve Colchester, Ipswich, Chelmsford, Basildon, Brentwood, Romford, and all parts of Essex, Kent, Surrey and London.
Reviews (2)
Steven Codling
Mar 30, 2021 Report
Excellent know what the problem was straight away no hassle just got on and did the job would reccomend..
Josh Cooper
Oct 11, 2019 Report
Positive:Punctuality,Quality,Responsiveness,Value
Had a new boiler installed yesterday (Monday) after my old one died last week. Very professional, fast, clean and very knowledgeable! The engineers also got on well with a very curious dog! Thanks AJS!