Looking for a reliable and efficient way to upgrade your commercial heating? At AGW Group Ltd, we specialise in fitting unvented heating systems throughout Andover, Hampshire. We offer expert installation of industry leading heating systems providing you with increased efficiency and long-term performance. We cover all levels of commercial boilers and large industrial heating systems and are on hand to advise you on the best heating system for your business. All equipment recommended and installed is from market leading manufacturers. So you can be safe in the knowledge that your commercial heating system will be reliable, highly effective and energy efficient.
We have a highly qualified and experienced team of heating engineers who carry out Commercial Unvented Heating Installations. Our comprehensive installs cover everything from initial advice on the best system for you, right through to commissioning and certification.
We are GasSafe Accredited and NICEIC approved engineers meaning all of our work is fully compliant and guaranteed. And all documentation is provided for building inspection and insurance purposes.
Unvented systems provide high water pressure directly from the mains, making them ideal for modern buildings with multiple bathrooms. Unlike traditional vented systems, they don’t require a cold water tank in the roof space. This means saving space and reducing the risk of freezing in winter. By storing water in a sealed cylinder it can deliver consistent high pressure water to all of your water outlets. And the scalable technology means this can be the ideal system for even the largest of properties.
We are fully qualified and experienced in designing, installating and maintaining commercial unvented heating systems, ensuring every installation meets current building and safety regulations. Whether you’re upgrading an old boiler or fitting a new system in a renovation or new building, we tailor the solution to your businesses specific needs.



Based in Andover, we cover all nearby areas and right across Hampshire. We work with organisations of all sizes, from small single unit businesses to large multi-site customers, providing effective and affordable Unvented Heating Systems. Our local knowledge ensures quick response times and friendly, personal service.
High-pressure hot water for showers and taps
Space-saving design with no need for loft tanks
Energy-efficient systems to help reduce bills
Qualified installers with local expertise
Free quotes and honest advice
Ready to upgrade your heating system? Contact our Andover-based team today for a free consultation and quote.