Expert Cornwall boiler installations: 07984 095476
Boiler Installations
At JJM Gas Services we understand that replacing your boiler is a big deal and something you need to get right. Rest assured, as an experienced, honest and fully Gas Safe registered provider, we won’t let you down!

Initial Consultation and Boiler Procurement
Our first visit will involve assessing whether your boiler does indeed need replacing or if there’s life in the old dog yet. If we mutually decide that a new boiler is your best option, we’ll help you choose a system that provides the optimum combination of affordability and long-term efficiency.
Based in St Ives, West Cornwall, JJM Gas Services are a fully Gas Safe registered and highly experienced boiler installation specialist. Call us now for a friendly chat about your boiler installation/replacement needs, or read through our FAQs (frequently asked questions) below.
What will my boiler installation involve?
Friendly consultation and advice
Procurement of the right boiler for you
Sub-contracting of tradesman if needed
Flue replacement/repositioning
Free recycling of old boiler
Safety and functionality tests
Pipe cleansing and inhibitor application
Usage and energy-saving advice
Return ‘check-up’ visit at your convenience
Boiler Installation FAQs
What is a combi-boiler?
A combi boiler combines what a less sophisticated boiler and separate water tank/s do in one compact unit, saving you space and improving reliability.
What is a condensing boiler?
20-30% of the energy a non-condensing boiler uses is lost as water vapour and carbon dioxide bi-products escape via the flue (the ‘pipe’ that transports exhaust gases outside). Condensing boilers recover some of this lost energy by way of a heat exchanger, improving their efficiency by around 20%. Government legislation means that all boilers fitted after the 1st of April 2007 must be of the condensing variety.
What is a MagnaClean filter and do I need one?
A MagnaClean filter is a small, (usually) black cylindrical filtration device (roughly the same size as a can of Coke) that protects a boiler from debris build-up. While they’re not mandatory, like most gas engineers we install them as a matter of course because their boiler preservation qualities are invaluable.
What is central heating inhibitor?
Inhibitor is a blend of chemicals that counteracts the build-up of rust, scale, sludge and other materials that can clog up your pipes and radiators, resulting in poor performance or even system failure. Inhibitor is injected into your system – preferably when it’s empty. We apply inhibitor each and every time we carry out a boiler installation.
How do I know if a visiting gas engineer is qualified?
The Gas Safe Register has replaced CORGI as the government backed registration scheme for gas engineers, with membership attained via stringent tests. You can verify a gas engineers membership by checking their unique membership number or business name on the Gas Safe website.
Our full range of services
Heating system installations and upgrades
Boiler repairs, installations and servicing
Heating efficiency inspections and maintenance
Piping system design and installations
Gas fire servicing & installations
Cooker installations
General plumbing services
Landlords safety reports
Domestic and commercial energy installations