New Boiler Installation & Central Heating Systems

Get your NEW boiler quote

Get an accurate online boiler installation quote in seconds! Quote includes complete costs for a new boiler and installation.

New Boiler Quote Online

Price Guarantee

We will beat any Like for Like quote by £50!

We promise to our customers that any Like-for-Like new boiler installation quote from a reputable gas safe registered company we will beat by £50.

New Gas Boiler Installer Havant & Portsmouth

New Boiler Installations / Boiler Replacements

At DM we have years of experience providing the best quality boilers and services to customers throughout Portsmouth, Havant, Waterlooville, Cosham, Fareham, Chichester, Bognor Regis, Petersfield, South Hampshire and West Sussex at an affordable price and fitted by engineers you can trust. In that time, we have become unrivalled suppliers and installers of heating, hot water, and combi boilers, giving you the best option possible for your needs. Buying a new boiler is an investment, which is why you want to be sure you make the right choice especially as a good boiler should last you 10 – 15 years with regular servicing.

DM Gas & Heating provides free home consultations ensuring you get the right boiler for your home.

If your central heating system is regularly breaking down then it’s likely to be costing you money and leaving you feeling cold in your house. The older a system is, the more it is likely to breakdown and develop numerous faults. The type of central heating upgrades that we can offer will not only help to keep you warm and comfortable in your home, they will also help to bring down your monthly and annual fuel costs. A more effective and efficient heating solution with up to 10 years warranty on every new boiler we install.

All of our engineers are fully trained and Gas Safe registered, committed to providing the highest standard of workmanship and customer service. We can also beat any like for like quotes from national gas companies to ensure that you get the best value for money and the best central heating services in Portsmouth. Exposed surfaces will be protected and we’ll make sure all our rubbish is taken away and disposed of safely.

Central heating installer Havant & Portsmouth

Why you need a new boiler - Reasons to upgrade

With heating accounting for 60% of a households energy costs, it’s no wonder people are upgrading their central heating systems. If you are thinking of getting a new boiler then book an appointment with one of our experts who will help find the right boiler for you. Valliant has a wide range of combination boilers, system boilers, and regular boilers to suit everyone’s needs, we would also be more than happy to help explain these to you. Choose DM Gas and Heating for your Vaillant boiler installation.

A boiler installation can cost anywhere from £1600 upwards depending on the current system, the size of the property, the number of bathrooms, the existing controls for the heating and hot water, and how efficient you want your system to be. Certain systems and boilers can be more efficient and reduce bills further than simply changing the boiler like for like. Also, having the right controls that can talk to the boiler properly can have a large effect on your bills. Ideally, a programmer or thermostat should be able to modulate the power of the boiler, not just turn it on or off. Imagine driving your car with either your foot hard on the accelerator or hard on the brake, not very efficient!

New boilers have advantages over older models because they are:

  • More energy efficient which saves money
  • Cheaper to repair and need less repairs
  • Greener
  • Better control system

We are Vaillant Advance Installers

  • Up to 10 years guarantee on new Vaillant gas boilers
  • All installs include a system filter and inline scale filter
  • Our engineers are Vaillant trained
  • Finance options available
  • All premium options include a smart thermostat
  • Vaillant boiler service & repairs


Vaillant Boilers

Power Flush & Filters

A power flush will benefit not only your central heating system but your pocket too. Removing sludge and scale will improve the flow of water around your system, saving you money on fuel bills.

We recommend installing a system filter which works by collecting corrosive material, such as iron, before it circulates around your system, keeping it in one place.

Your filter will need to be serviced every 12 months and this can coincide with your regular boiler service. The benefits of a system filter will ultimately prolong the life of your boiler and prevent iron oxide materials from clogging up the system, ensuring your home is more economically efficient.

Smart Controls

Replace your old thermostat with a new smart version to experience a new level of comfort and control, whilst saving energy and money. With a smart thermostat you can control your heating and hot water from anywhere in the world.

When you’re coming back from holiday and don’t want to walk into a cold house, or you’ve stayed at work longer than expected, a smart thermostat means you can turn the heating on or off whenever you want to.

With many different brands on the market we have carried rigorous testing, to find the best options for our customers.

Central Heating Installation & Design

Central Heating design and installation needs to take in to account heat loss calculations, building exposure, system sizes, number of radiators, number of bathrooms, your hot water demands and so much more. There are a huge number of different solutions available to meet your requirements and ensuring you have the right heating company on board to design and install your central heating system is critical. You can be confident when using DM Gas & Heating that we will explain all the different systems, their benefits, and provide a competitive quote. We are confident you will happy with your quote, our service level, and you will always be kept informed and updated both before and during the installation. You will also have the peace of mind of our after care commitment.

A poor central heating system can be inefficient and cost you a lot more money than you may think you are saving... Our team of Gas Safe registered engineers are here to make sure that doesn't happen and with advances in thermostats, smart controls, and zoning can save you money.

Boiler Installation Costs - How much does a boiler cost to replace?

Your cost will depend on a number factors including; the type of boiler you are looking at, the number of radiators you have or need, the number of bathrooms, whether you want to move the boiler location, if new gas pipework is required. Taking all this into account is why the best way to find out how much a new boiler is, would be to contact us to arrange a FREE no obligation visit and quotation, alternatively use our online quote for new boiler installations.