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Warmhaus MinerWa Combi Boiler

Warmhaus MinerWa Combi

The Warmhaus MinerWa Combi is suitable for homes with just one bathroom.

Labelled the world’s smallest and lightest combination boiler, the Warmhaus MinerWa Combi is a gas-fired condensing boiler that has received three design awards and comes complete with exclusive long-lasting components. It allows for easy installation in narrow spaces and offers a modern and stylish design, with various colour options available. This boiler also has some distinctive features to improve reliability, performance and life expectancy.

How Much Does this Boiler Cost?

The Warmhaus MinerWa Combi has an output of 25kW and usually costs £650, including VAT. You also need to get a Gas Safe registered engineer to install the boiler and you can expect to pay between £500 and £1,500 for them to carry out the fitting work. To compare prices and find the best deal on the boiler and the installation, make sure you contact a range of local and national installers for a fixed-price quote.

How will I know if this Boiler is Suitable for My Home?

Combi boilers heat water from the mains to deliver heating and hot water on demand, so you won’t need any tanks in the loft of a hot water storage cylinder if you purchase the Warmhaus MinerWa Combi. By being compact and capable of doing its job without needing additional components, this boiler is also a fantastic choice for properties where space is limited. It is, however, only available in an output of 25kW and with a hot water flow rate of 15 litres per minute, making this boiler ideal for small to medium-sized homes with one bathroom and around 10 to 12 radiators.

Before you choose this boiler, you need to determine the correct boiler size for your home so that it can meet your heating and hot water requirements. This isn’t an easy task, so be sure to ask a Gas Safe engineer if the 25kW Warmhaus MinerWa Combi is a suitable replacement.

Is it a High Efficiency Boiler?

Yep. This is an efficient condensing boiler with an electronic gas adaptive system and full premix feature to provide up to 108% efficiency and savings. It has a modulation ratio of 1:10 to enable the boiler to reduce its power down according to your energy demand and to save on both gas and electricity. The Warmhaus MinerWa Combi also has an A-class energy label with an efficiency rating of 92%.

Does this Boiler have a Good Range of Controls and Features?

This compact boiler from Warmhaus has a stylish appearance with a polymer glass surface and an easy to use control panel with a wide lit screen that displays the heating and hot water temperatures, power modulation with flame symbol and system pressure. It has a single-coil stainless steel main heat exchanger and stainless steel plate heat exchanger, as well as turbine sensor technology to monitor the hot water flow rate instantaneously. The MinerWa Combi also has a hydroblock composed of durable brass and composite components, an electronic gas adaptive system, full premix feature and modulation range of 1:10 for greater energy savings. What’s more, it comes complete with a pre-heat function for instant hot water and is compatible with the RecoWa smart room thermostat set that lets you control your boiler from a smartphone.

How long is the Warranty on this Boiler?

The Warmhaus MinerWa Combi comes with a 2-year manufacturer-backed warranty as standard, and this must be registered within 30 days of installation.

Summary of Important Information

  • Expect to pay £650
  • Heating output of 25kW
  • Hot water flow rate of 15 litres per minute
  • Dimensions of 595mm (H) x 379mm (W) x 260mm (D)
  • Uses gas as its fuel source
  • A-rated for efficiency
  • 2-year warranty as standard

Pros and Cons

If you’re looking for a space-saving combi boiler that can help to lower your energy bills, the Warmhaus MinerWa Combi could be the one for you. Although small, it has lots of impressive features and benefits, including specially designed components that are best in class. The only negative is the boiler comes with a warranty of just 2 years.


  • Considerably cheaper than some other gas boiler brands
  • Suited to small and medium-sized homes with one bathroom
  • Stylish appearance and compact dimensions
  • Different colour options available
  • Polymer glass surface – impact resistant and easy to clean
  • Easy to install, use and service
  • Gas adaptive control system – provides maximum efficiency
  • Turbine sensor technology – hot water is always kept constant
  • 1:10 modulation ratio with high savings
  • Stainless steel heat exchanger – maximises longevity, reliability and efficiency
  • Provides maximum energy efficiency – reduce fuel bills and carbon emissions
  • Compatible with the RecoWa smart room thermostat – improves efficiency and performance


  • 2-year warranty – would prefer a longer standard guarantee
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