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Installing and servicing boilers in Hampshire

At Diamond Gas and Heating, the customer is at the heart of everything we do. We are a family-run business with specialist Worcester Bosch Accredited, Gas Safe registered installers. We offer top-quality boiler services, repairs and installations to Portsmouth, Fareham, Gosport, Southampton and all surrounding areas.

Our Services

We are a Worcester Bosch Accredited Installer

With that come great benefits to you

  • Up to 12 years guarantee on Worcester Bosch gas boilers***
  • All installs include a system filter and inline scale filter
  • Our engineers are Worcester trained
  • Finance options available
  • All premium options include a NEST smart thermostat

How much a new boiler could cost you? It’s less than you think.

Start your boiler quote

Choose how you want to finance your boiler

Includes a new top of the range Worcester Bosch boiler, controls and installation

Yours and fitted from* 1,695 Includes VAT
9.99 Per Month at 9.9% APR
  • 3, 4, 5, 8 and 10 year finance options
  • 0% APR spread the cost with 12 equal monthly payments, months interest free
  • Buy now and pay later
Find out how finance could help you

Reassurance from just
£6 per month

When it comes to boilers and central heating, peace of mind is the most important thing we can offer. That’s why our four-tiered care plan system is great. It means you can rest easy knowing you’ll be looked after when you need it most.

Find out more about Warmcare

Why choose
Diamond Gas and Heating?

  • Quality-rated boilers

    All of our boilers come with a manufacturer-backed guarantee and are Which? Best-Buy rated.

  • Honest and accurate pricing

    We provide fast and accurate quotations with no hidden fees or costs.

  • Warmcare packages

    We offer flexible and scalable packages to suit your needs, ensuring you feel safe and secure in the knowledge that you are protected from boiler breakages and shutdowns.

  • Friendly professional service

    All of our engineers are Gas Safe registered and follow strict practice guidelines.

A family business

When  husband and wife Ian and Louise Simm launched Diamond Gas & Heating in 2011, they knew they could offer something better than the local competition.

The pair had military backgrounds, each serving in the Royal Navy, with a combined service of 28 years. Ian had been an engineer and Louise in communications.

With their combined skills and background, the team knew they could offer the competitive prices of a local gas fitter, without compromising on quality and customer service –  all while offering 24/7 call-outs and complete peace of mind for the customer – something that truly sets them apart from the rest.

Ian Simm

Director

Louise Simm

Director

Amy Long

Customer Service
Find out More