Experienced. Honest. Reliable.
Boiler Installation
With years of hands-on experience installing boilers of all makes and models, you can be confident you're in expert hands.
Added Protection as Standard
These preventative steps give your new boiler the best start and help avoid problems down the line.
Fitting a system filter
Proven to reduce breakdowns
by up to 20%
A full system flush
Clears out debris and sludge
Adding protective chemicals
Helps keep your system running smoothly
Helping You Make the Right Choice
Choosing a new boiler can feel overwhelming—but we’re here to make it simple. We’ll assess your needs and guide you through the best options, ensuring you have all the information to make a decision that suits your home, lifestyle, and budget.


Built to Last
We believe in doing things right the first time—no shortcuts, no corner-cutting. All our installations are carried out to the highest standards, helping your boiler perform efficiently and reliably for years to come.
See what our customers say
Talk about service with a smile! We used Sam and his team to install a new boiler and underfloor heating in our renovation. In addition he has fitted a gas cooker and carried out the annual services. Every time it has been a pleasure to deal with Sam and the team, they arrive on time and are super efficient - HIGHLY RECOMMENDED
Write your caption hereJo & Mark, Sandilands CottagesSlide title
We have used Sam Rainbow Heating several times, they offer an extremely prompt service from quote to completion of the job... we would highly recommend their work.
Mark & Tracy, AbergynolwynSlide title
Power flushing my heating system was required, after contacting Sam, this was performed quickly and efficiently. The price was very reasonable. I would recommend their services to anyone with plumbing problems. Thank you very much, my issues are now solved!
Robert - Tywyn