New boiler supply and installation by Gas Safe registered engineers. All major brands fitted across Portsmouth and Hampshire — with a free survey and written quote before anything starts.
If your boiler is old, unreliable or expensive to run, a new boiler installation could be one of the best investments you make in your home. At RMWS Plumbing & Heating, we supply and install energy-efficient boilers across Portsmouth, Southsea, Fareham, Gosport and the surrounding Hampshire area — all carried out by our Gas Safe registered engineers.
Modern condensing boilers convert over 90% of fuel into usable heat, meaning a new installation can significantly reduce your energy bills while keeping your home warmer. We'll carry out a free survey of your property, recommend the right boiler type and size, and give you a written quote before any work begins.
What's included in our boiler installation service
Free home survey and boiler recommendation
Supply and fitting of your new boiler
Removal and disposal of your old boiler
Full Gas Safe certification issued on completion
Manufacturer warranty registration
Boiler controls and thermostat set up
System chemical flush where required
Full demonstration before we leave
Boiler brands we install in Portsmouth
We install all leading boiler brands and will recommend the best option for your home, budget and heating requirements.
Worcester Bosch
Vaillant
Ideal
Baxi
Viessmann
Glow-worm
Our installation process
1
Free Home Survey
We visit your property, assess your heating system and recommend the right boiler for your needs and budget.
2
Written Quote
You receive a clear, itemised written quote. No hidden costs — we charge exactly what we quote.
3
Installation Day
Our Gas Safe engineer arrives on time, removes your old boiler and installs the new one — typically within one to two days.
4
Certified & Complete
We fully test the system, issue your Gas Safe certificate and walk you through everything before we leave.
Areas we cover for boiler installation
Based in Southsea, we cover all of Portsmouth and the surrounding Hampshire area for boiler installation.
Boiler installation costs in Portsmouth typically range from £1,500 to £3,500 depending on the boiler type, brand and complexity of the installation. We provide free surveys and written quotes so you know exactly what you'll pay before work begins.
Most boiler installations in Portsmouth take one to two days. We'll give you a clear timeline when we survey your property.
Yes, someone over 18 should be present throughout the installation. We'll agree a start time that suits you and keep you updated throughout the day.
Modern A-rated condensing boilers are significantly more efficient than older models. Many Portsmouth homeowners see a noticeable reduction in gas bills after installing a new boiler, especially if their old one was over 10 years old.