Experience You Can Rely On
Professional Gas & Heating Services
With over 15 years of experience, Thermo Gas Avalas provides friendly, reliable and professional support across gas, heating and hot water systems. We work with homeowners, landlords, managing agents and commercial customers, offering clear advice, practical solutions and high-quality service.
From boiler repairs and servicing to heating faults, unvented cylinders, underfloor heating, HIU systems and air conditioning-related work, we aim to provide clear communication, safe solutions and service you can depend on.
Professional Qualifications
Qualified Across Heating, Hot Water, Heat Pumps & Cooling Systems
Our professional qualifications allow us to work safely and confidently across gas, hot water, heat pump, air-conditioning and cooling systems.
Gas Safe Registered
Registered to carry out relevant gas work safely, legally and professionally.
G3 Unvented Hot Water Certified
Qualified to install, service and repair unvented hot water cylinders and associated safety controls.
Heat Pump Design & Installation
Qualified in the design and installation of modern heat pump systems for efficient heating solutions.
Air Conditioning Services
Qualified to work with air-conditioning systems, including installation, servicing and system support.
F-Gas Qualified
Qualified to handle regulated refrigerants used in air-conditioning and heat pump systems.
Who We Work With
Heating Support for Every Type of Customer
We provide professional gas, heating, hot water and cooling services for residential, managed and commercial properties across London.
TECHNICAL EXPERIENCE
Experience Beyond Boiler Repairs
Our experience covers a wide range of gas, heating, hot water and cooling systems. This allows us to look beyond the immediate fault, consider how the complete system is operating and recommend the most appropriate solution.
We focus on accurate fault finding, system performance and long-term reliability. By looking at how each component works together, we can identify underlying issues, explain the available options clearly and recommend a solution suited to the property and its heating requirements.
ADDED PEACE OF MIND
12-Month Warranty on Our Services
We proudly provide a 12-month warranty on our services, giving customers additional confidence and support after the work has been completed.
Combined with our professional and safety-focused approach, this provides added reassurance when choosing Thermo Gas Avalas for your heating, hot water and cooling requirements.
A Personal Message From the Owner
Helping Customers Is at the
Heart of What We Do
I genuinely enjoy my work and take pride in helping customers solve their gas, heating and hot water problems.
With over 15 years of experience, my approach is to listen carefully, explain the issue clearly and recommend
a practical solution suited to the property.
My team and I aim to provide a friendly, reliable and professional service from start to finish.
Goran Miljusevic
Founder & Gas Safe Engineer
Thermo Gas Avalas