WHAT WE DO
Professional Heating, Hot Water & Cooling Services
Explore our full range of repair, servicing and installation services for domestic, managed and commercial properties across London
Boiler Repair
Professional fault finding and repairs for boiler breakdowns, pressure problems, heating faults and common error codes.
Boiler Servicing
Routine boiler servicing to help maintain safe operation, efficiency and dependable performance.
Boiler Installation
Professional boiler installation and replacement based on the needs of your property and heating system.
Central Heating & System Repairs
Diagnosis and repair of radiator problems, circulation faults, controls and wider central heating system issues.
Underfloor Heating Services
Support for underfloor heating faults, controls, manifolds, circulation and system performance problems.
Unvented Cylinder Repairs
Servicing and repairs for unvented hot water cylinders, safety controls and associated system components.
Heat Interface Unit Repairs
Fault finding, servicing and repair support for HIUs supplying heating and hot water in apartments and managed properties.
Heat Pump Services
Professional support for heat pump design, installation, servicing and system performance.
Air Conditioning Services
Installation, servicing and fault support for suitable residential and commercial air-conditioning systems.
Why Choose Thermo Gas Avalas?
When you need support with a boiler, heating, hot water, or cooling system, accurate fault-finding and reliable service matter. With over 15 years of experience and qualifications across traditional and modern systems, we provide clear advice and professional support from the first inspection through to completion.
PRICING & QUOTES
How Our Pricing Works
Initial Assessment
Clear Quote
Your Approval Comes First
PROJECT GALLERY
A Closer Look at Our Recent Work
Explore examples of boiler, heating, hot water and HIU work carried out by Thermo Gas Avalas.
Not Sure Which Service You Need?
You do not need to diagnose the problem before contacting us. Simply describe what you have noticed, such as a fault code, unusual noise, loss of pressure, uneven heating or a hot water issue.
Where helpful, you can also send us a photo of the system or control panel. We will review the information and help you understand the most appropriate next step.