Business Details
21 Years
experience
Emergency
services
Trusted Heating Contractors in Chelmsford
Founded in 2005 by Lee Nichols, our company has built extensive expertise in domestic and commercial heating systems. We specialise in energy-efficient gas and oil heating solutions, installing over 250 boilers annually across Essex. Our team comprises specialists in boiler installation and system repairs, ensuring technical excellence across all projects. Accredited by leading manufacturers including Worcester Bosch and Viessmann, we maintain Gas Safe and Oftec registrations for compliance and safety. Our customer-centric approach prioritises trustworthiness, professionalism, and reliability, evidenced by our 10/10 customer satisfaction score on Checkatrade.With a showroom in Chelmsford, we serve properties within a 20-mile radius, offering tailored solutions for individual heating needs. Our commitment to minimising disruption during installations reflects our focus on maintaining clean working environments. Backed by 750+ verified reviews, we continuously refine our services based on client feedback. As an FCA-authorised credit broker, we provide flexible financing options to suit diverse budgets.
Services
Boiler Installation
Gas Safety Testing
Underfloor Heating
Air Conditioning
Plumbing Services
Details
- Year established: 2005
Highlights and features
- 20 years' experience in domestic and commercial heating systems
- Worcester Bosch Diamond Accredited Installer status
- Specialist engineers for installations and emergency repairs
- Energy-efficient solutions reducing annual bills by up to 350
- 24/7 emergency repair service with rapid response times
Associations and certifications
- Worcester Bosch
- Viessmann
- Gas Safe
- Oftec
- Financial Conduct Authority
What people say
Friendly & polite engineers
Minimal disruption during work
Efficient service completion
Expert technical knowledge
Child-friendly professionals
Services
Boiler Installation
We specialise in complete boiler replacements for gas, oil, and LPG systems. Our engineers install approximately 250 boilers annually using manufacturer-certified techniques. Each installation includes system flushing, efficiency testing, and comprehensive warranty registration with leading brands like Worcester Bosch.
Gas Safety Testing
Our Gas Safe registered engineers conduct thorough safety assessments for domestic and commercial properties. Services include flue testing, gas pressure checks, and appliance condition evaluations. We issue official Gas Safety Certificates valid for 12 months as required by HSE regulations.
Underfloor Heating
We design and install low-profile underfloor heating systems using dust-free application methods. Our solutions integrate with various boiler types and include smart thermostat controls. The system provides even heat distribution while maintaining minimal floor height increase for modern properties.
Air Conditioning
Our F-Gas certified engineers install residential and commercial air conditioning systems. We offer ducted and split-unit solutions with energy-efficient inverter technology. All installations include refrigerant leak testing, electrical compliance checks, and user training for system controls.
Plumbing Services
We handle complete central heating system maintenance including pipe replacement, radiator upgrades, and unvented cylinder installations. Our engineers use pressure testing equipment to identify leaks and perform system flushes to maintain optimal efficiency across all plumbing components.
People
Lee Nichols
Founder & Director
Lee established the company in 2005 after 15 years in the heating industry. He oversees daily operations and conducts all initial site surveys. His leadership focuses on maintaining technical excellence while expanding service capabilities through continuous engineer training.
Sam
Senior Engineer
Certified in Worcester Bosch and Viessmann systems, Sam specialises in complex boiler installations. With 12 years' field experience, he leads our installation team while mentoring junior engineers in best practice safety protocols and customer service standards.
Rob
Lead Service Engineer
Rob manages our annual service programme covering 1,200+ boilers. His expertise in fault diagnosis reduces repair times by 30%. He also trains engineers in Oftec-compliant oil boiler maintenance techniques and emergency repair procedures.
Questions
What boiler brands do you install?
We install Worcester Bosch, Viessmann, Vaillant, Glow-worm, and ATAG boilers with manufacturer-backed guarantees.
Do you offer emergency repairs?
Yes, our dedicated repair engineers provide emergency services with rapid response times for heating breakdowns.
Are your engineers certified?
All engineers hold Gas Safe and Oftec registrations with specialist accreditations for specific boiler brands.
Can I finance a new boiler?
We offer 0% APR for 24 months, 5-year and 10-year plans at 10.8% APR through Novuna Personal Finance.
What areas do you cover?
We serve Chelmsford and surrounding areas within a 20-mile radius from our Widford Industrial Estate base.
Reviews (5)
Asim Ayub
Nov 29, 2021
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I used Assured heating to replace an old back boiler in my property with a combi boiler. They gave me a very competitive quote and did a professional job. Their customer service and professionalism is second to none. As a token appreciation flowers were delivered to our property. I highly recommend them. They really took the stress away from the whole experience and I am very happy that I used them.
Nicola Walsh
Nov 02, 2021
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Positive:Punctuality,Responsiveness,Value
Fitted new radiators, they look great. Had an issue the next morning with the boiler not working but someone came round within couple of hours and sorted it. Great customer service
Service:Heating system installation
Fitted new radiators, they look great. Had an issue the next morning with the boiler not working but someone came round within couple of hours and sorted it. Great customer service
Service:Heating system installation
Steve Dobie
Oct 20, 2021
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Assured heating engineer arrived promptly on time and the annual boiler service was completed with no problems. Once again a professional job done..
Service:Heating maintenance
Service:Heating maintenance
Joyce Roberts
Oct 14, 2021
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We have been using Assured Heating for about 10 years now and have always felt confident in the work they carry out. The admin side is very effective with regular updates on timing and arrival of the engineers is on time. Each engineer that has called - we had Mark this time- is always a good representation of the company. They are polite and courteous, unobtrusive and always leave the job clean and tidy afterwards. I know that if we have a problem they will be quick to respond and it has never been an issue. Their prices are very reasonable and the work carried out is always of a high standard
Peter Bates
Jul 21, 2021
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From my first phone call every promise of a return call or visit was kept virtually to the minute so top marks for reliability and timekeeping. The MD, Lee needed to visit twice due to my misinformation
but there were no complaints and his advice on placement of the boiler plus all other equipment and help in design were excellent. The installers, Sam & Rob were a delight to have in the house and their workmanship is the neatest and cleanest of any contractors we have used. The precision of the work they did and their willingness to install difficult pipe runs to achieve a neat finish were beyond
but there were no complaints and his advice on placement of the boiler plus all other equipment and help in design were excellent. The installers, Sam & Rob were a delight to have in the house and their workmanship is the neatest and cleanest of any contractors we have used. The precision of the work they did and their willingness to install difficult pipe runs to achieve a neat finish were beyond
