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Trusted Gas Boiler Maintenance Services in the South of England
Established with a commitment to excellence, C N C Heating has built its reputation on delivering high-quality heating solutions for both commercial and domestic clients. Our First in Service Policy ensures every project adheres to strict quality standards, from initial enquiry to completion. With over 25 years of experience, we combine technical expertise with ongoing staff training, including apprenticeship programs, to maintain industry-leading service. Our PAYE engineers operate across the South of England, supported by advanced technology for rapid response and detailed reporting.

We specialise in boiler commissioning, LTHW systems, and emergency call-outs, serving major developers and property management companies. Client confidence is reinforced through Gas Safe registered engineers, site-specific training, and a focus on clean, safe working environments. Our service plans cater to commercial clients, while domestic customers benefit from annual reminders and free quotations. This approach has earned us a trusted position in the heating industry, supporting both new installations and legacy systems.
Services
Boiler Commissioning Heat Interface Units Emergency Call-Out LTHW Maintenance Gas Testing Landlord Certifications Modular Boiler Installation
Highlights and features
  • We offer 24/7 emergency call-out for commercial clients
  • All engineers are Gas Safe registered
  • Tailored service plans for commercial developments
  • Free quotations for boiler replacements and repairs
  • Over 25 years of experience in heating systems
Services
Boiler Maintenance
Our comprehensive boiler maintenance covers commissioning, servicing, and repair of all gas and oil-fired domestic and commercial boilers. We ensure optimal performance through regular inspections, component checks, and efficiency testing. Clients benefit from extended boiler lifespan and reduced breakdown risks.
Heat Interface Units
Specialist installation, commissioning, and maintenance of Heat Interface Units for residential and commercial properties. Our engineers ensure compliance with current regulations while optimising heat distribution efficiency. This service maintains consistent hot water supply and system reliability.
Emergency Call-Out
Commercial clients receive 24/7 emergency boiler repair services with first-time fix capability using stocked spares. Rapid response minimises downtime for critical heating systems. Available exclusively for contracted maintenance clients across the South of England.
LTHW Systems
Planned preventative maintenance and chemical cleaning for Low-Temperature Hot Water systems. Our engineers ensure efficient operation through regular servicing and system optimisation. This maintains consistent heating performance in commercial and residential buildings.
Gas Safety Certificates
Landlord gas safety inspections and CP12 certification for rental properties. We conduct thorough checks of gas appliances and pipework to ensure tenant safety and legal compliance. Reports include detailed findings and required remedial actions.
Questions
Which areas do you cover?
We operate throughout the South of England with engineers based across the region for rapid response.
Do you offer service plans for domestic clients?
Commercial clients can arrange service plans, while domestic customers receive annual service reminders.
Are your engineers qualified?
All gas engineers hold current Gas Safe registration as required by law.
Is emergency service available?
24/7 call-out is available for commercial maintenance contract holders.
Do you charge for quotations?
We provide free quotations for boiler replacements and remedial works.
Can you service older boilers?
Yes, we service all boiler types and provide upgrade recommendations if required.