Arrange a survey and written quote with our local Gas Safe engineers. Get in touch and we'll find a time that suits you.
Our Services
Boiler Installation
About This Service
The right boiler for your home, fitted properly
Preston Fleming Plumbing & Heating is a family-run heating firm with trading roots going back to 1954. We're based in Cardross, just outside Dumbarton, serving Helensburgh, Alexandria and the surrounding area.
For boiler installation in Dumbarton and nearby, our Gas Safe registered engineers fit combi, system and regular boilers from Ideal and Worcester Bosch. We look at how your home uses heating and hot water before recommending anything, so the boiler suits the house.
Whether it's a straight swap, replacing an old back boiler or a full heating upgrade, you get a written quote before any work starts and full certification when the job's done.
Testimonials
What our clients say about our work
“I needed a new boiler for my 88year old dad and the Preston Fleming team made the full process quick and totally stress free. They had the boiler in and working 2 days after i confirmed to go ahead. The team left my dads place spotless and even fitted his new washing machine for him. A first class service.”
Derek Boyd
Google
Google“Great service from start to finish.
The guys fitted a new boiler and couldn’t be happier.
Very professional.
Will be using them again and would highly recommend them”
Graeme Cameron
Google
“New combi boiler works carried out quickly and without hassle shortly after receiving the quote.
House left tidy and team were all friendly.
House toasty in time for winter and I d 100% happily rec”
“We have used James and his team a number of times. They have replaced and installed a new boiler, conducted the annual boiler service and most recently, James came out to remove and replace a radiator at short notice to help us out. They have always arrived promptly, been extremely efficient, and professional, and the jobs always been carried out to a high standard. We won't be using any other company and would definitely recommend them to anyone needing their services.”
Shona Archer
Google
Our Process
How It Works
Survey & written quote
We visit your home to look at your pipework, flue route and hot water needs. You then get a clear written quote and timescale for your property.
Installation & commissioning
Our Gas Safe engineers fit the new boiler, complete all pipework and flue works, commission the system and run safety and efficiency checks on the day of installation.
Certification & local support
We register the install with the manufacturer and Gas Safe, hand over documentation and servicing advice, and remain available for follow-up service or warranty work.
Benefits
A family firm you can rely on
Decades of local experience
Family-run and trading in Dunbartonshire since 1954, with practical knowledge of local properties, tenements and stone-built homes.
Fully accredited and Gas Safe
All gas work is carried out by Gas Safe registered engineers and qualified to BPEC, SNIPEF and CSCS standards.
Up to 12 years' warranty
As Ideal Max accredited installers, we can offer up to 12 years' manufacturer warranty on qualifying Ideal boilers. We register your new boiler with the manufacturer and hand over all the paperwork.
Which boiler is right for your home?
There are three main types of boiler. The right one depends on the size of your home and how much hot water you use.
A combi boiler heats water as you need it, with no tank or cylinder. It suits most flats and smaller homes with one bathroom.
A system boiler works with a hot water cylinder, so it suits homes with two or more bathrooms where several taps may run at once. If you're thinking about an unvented cylinder, see our Megaflo cylinder installation page.
A regular boiler, sometimes called a conventional or heat-only boiler, uses a cold water tank in the loft as well as a cylinder. It can be the simplest choice for older homes that already have one.
We fit boilers from Ideal and Worcester Bosch, in everything from modern flats to Victorian villas, and we'll explain our recommendation at the survey.
What's included in your installation
Every installation includes a full survey, manufacturer registration where it applies, commissioning, safety tests and all the paperwork. We remove your old boiler, check the flue and condensate route, and leave the job tidy.
We also take on the bigger jobs, such as removing old back boilers, moving homes from oil to gas, and replacing radiators and pipework as part of a full heating upgrade.
Once your new boiler is in, a yearly boiler service keeps it running well. Most manufacturers need one each year to keep the warranty valid.
How much does a new boiler cost?
The price depends on the type and size of boiler, whether it stays in the same place, and how much pipework, flue or controls work is needed. Swapping like for like in the same spot usually costs less than changing boiler type or moving it to another room.
We price every job after seeing your home, so your written quote sets out exactly what's included.
FAQ
Frequently Asked Questions
We install combi, system and regular (conventional) boilers from leading manufacturers including Ideal and Worcester Bosch. During the survey we'll recommend the right type based on hot-water demand, cylinder requirements and existing pipework.
It depends on how complex the job is. A straight swap in the same place is usually done quickly, while changing boiler type or moving the boiler takes longer. Your written quote sets out the expected timescale and anything that could extend the job, such as flue alterations or extra pipework.
Yes. We register the new boiler with the manufacturer where required, provide Gas Safe certification and hand over all warranty documents. All new boiler installations also come with a 3-year personal guarantee from us directly.
Yes. Checking the flue and condensate pipe, and fitting or altering them if needed, is part of the survey. We make sure the flue route and ventilation meet current regulations, and we'll tell you if any extra work, permissions or a building warrant are needed for your property.
We disconnect and safely remove the old boiler and dispose of it in line with regulations. Our engineers leave the work area clean, complete commissioning checks and show you how the new system works before they leave. Ongoing servicing and maintenance options are available to keep the warranty valid and the system running efficiently.
If your boiler is more than 10 to 15 years old, breaks down often or needs parts that are hard to find, replacing it usually makes more sense than paying for repeated repairs. A newer boiler is also more efficient, which helps with running costs. If you're not sure, we can look at it and talk you through both options.
Ready for a reliable boiler upgrade?
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