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Main Eco Compact Heat Boiler

The Main Eco Compact Heat is suitable for homes with a traditional heating and hot water system.

Boasting a lower price tag than many other budget boilers, the Main Eco Compact Heat is a reliable regular boiler and the perfect replacement for old top flue boilers. Not only is this boiler compact and lightweight but it’s available in four outputs to suit different homes and most heating and hot water needs. If you have more than one bathroom and you’re searching for an efficient budget-friendly boiler, the Main Eco Heat could be the one that matches your requirements.

How Much Does this Boiler Cost?

The Main Eco Compact Heat can be purchased with an output of 15kW, 18kW, 24kW or 30kW and will cost you anything between £720 and £830, including VAT. However, you also need to put some money aside to pay for the installation work, which can be anything from £500 to £1,600. If you want to get the best deal on the boiler and the fitting work, contact a range of Gas Safe registered heating engineers for a fixed-priced quote. Once you receive a handful of quotes, you can compare prices and choose the one that suits your budget.

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

Main’s Eco Compact Heat is a regular boiler, sometimes known as a heat-only or conventional boiler, and is ideal for homes with multiple bathrooms and high hot water demand. It’s also a good choice for properties with low water pressure issues. The only downside to this type of boiler is that it needs to be linked to tanks in the loft and a hot water storage cylinder (usually found in an airing cupboard). As it requires more storage space, the Eco Compact Heat is better suited to homes with an existing regular boiler and properties that already have these additional components. 

If you’re unsure whether a regular boiler is right for your home or you have one but don’t know which size replacement you need, we recommend you contact a Gas Safe registered for expert advice.

Is it a High Efficiency Boiler?

It is. The Main Eco Compact Heat is an A-rated gas-fired boiler, meaning it’s one of the most efficient regular boilers on the market. It has also been endorsed by the Energy Saving Trust who is a trusted voice on energy efficiency. If you currently have an old, standard efficiency boiler and you replace it with this one, you’ll benefit from lower running costs and save money on your gas bills. 

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

This boiler has a top central flue and comes with an industry-leading choice of flue lengths, bends and accessories. It also has an easy fit wall-mounted bracket and front and side access to the boiler components. The user controller has a reset button, a rotary knob to set the maximum flow temperature of the heating water and two illuminating push buttons to provide information about the operating condition. 

How long is the Warranty on this Boiler?

The Main Eco Compact Heat comes with a 5-year boiler warranty as standard and it must be registered within 30 days of installation.

Summary of Important Information

  • Expect to pay between £720 and £830
  • Heating output of 15kW, 18kW, 24kW or 30kW
  • Dimensions of 625mm (H) x 370mm (W) x 270mm (D)
  • Uses gas as its fuel source
  • A-rated for efficiency
  • 5-year warranty as standard

Pros and Cons

If you’re looking for a regular boiler that won’t break the bank, the Main Eco Compact Heat is a good low-cost choice but we think the user controls are quite basic and we’re not impressed by the Which? brand score. It might be best to do a little more research and get your boiler engineer’s opinion before you purchase this one.  


  • Considerably cheaper than some other gas boiler brands
  • Suited to small, medium and large-sized homes with multiple bathrooms
  • Can handle high hot water demand with ease
  • Compact cupboard fit
  • Easy to install, use and service
  • Front and side access
  • No pump overrun or permanent live required
  • Industry choice of flue lengths, bends and accessories
  • Energy Saving Trust endorsed
  • Provides maximum energy efficiency – reduce fuel bills and carbon emissions 
  • 5-year warranty


  • Main has an overall Which? score of 48%
  • Requires separate cylinder and loft tanks
  • Basic user controls
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