Main Main Eco Compact 25kW Combi Gas Boiler

Main Eco Compact 25kW Combi Gas Boiler
Total Cost
£1,620 - £1,920
Manufacturer Main
Boiler Model Main Eco Compact 25kW Combi Gas Boiler
Condensing boiler? Condensing
Energy Efficiency Rating 93%
Energy Band A Rated
LPG model/Conversion kit Yes
Manufacturer Warranty 5 Years
Heating Output 25kW
Wall Mounted or Floor Standing Wall Mounted
DHW Flow Rate 12 l/min
Total Cost £1,620 - £1,920
ERP Rating A Heat A Water
Hot Water Max Output
Main Eco Compact 25kW Combi Gas Boiler

Main Eco Compact 25kw combi boiler review

Main Eco Compact 25kw combi boiler is a gas-fired boiler that offers many benefits at a great price. This compact, lightweight boiler fits perfectly in a cupboard. You have the option to choose from several outputs to suit your heating and hot water needs.

It is made by the boiler company Main, which is owned by Baxi.

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The boiler’s small size, lightweight and wall mounting make it easy to install and will save you both time and money. After the boiler has been installed, you can reap the many benefits it brings to your home. It boasts a 93% efficiency rating and an ErPA rating for heat and hot water.

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Product Description:

The Main company developed and produced the very dependable condensing Eco Compact 25kW Combi gas boiler.

The Eco Compact boiler was created to minimise space around the house and, because it is a wall-mounted appliance, it can be hidden in a cabinet. You could be saving money on the installation because of its modest weight.

Once installed, this unit will assist you in lowering your energy costs as it has an ErP A certification for heating and hot water and a 93% efficiency rating. This boiler’s 25kW output rating makes it the ideal choice for medium-sized households that don’t require as much heating and hot water.

This extremely dependable appliance has minimal NOx emissions, is completely Boiler Plus compliant, is Energy Saving Trust endorsed, and is classified as a class 5 (the highest class) for emissions. Brass hydraulic block, top central flue, standoff frame option, and full compatibility with the Baxi uSense wired smart thermostat.

To provide you additional piece of mind, the Eco Compact is available with 5-year parts and labour warranty as standard.

Why choose?

Main Eco Compact 25kw combi boiler - Made by Main Heating which is owned by Baxi

This Main combi boiler is the one for you if you’re searching for a reasonably priced boiler that can heat your water effectively at A-rated ErP water heating efficiency.

The portable boiler is small and compatible with Main Heating’s tried-and-true technology. Additionally, a five-year warranty is included.

  • There are two options: 25kW and 30kW.
  • 5-year guarantee on components and labour
  • Adopted by the Energy Saving Trust
  • Boiler Plus compatible
  • Weighs 29.5kg and fits within a tiny cabinet.
  • Class 5: Low NOx emissions (the best).
  • Block of brass hydraulics
  • Central and top flue
  • Link to stiff filling available with stand-off frame
  • Certified to use hydrogen at 20%

What does the Main eco compact 25 combi do?

Water heated by the Main Eco Compact Combi boiler comes from the mains. Loft tanks or hot water storage cylinders are not necessary for the boiler to function.

It is not necessary to use external heating pumps with the Main Eco Compact Combi. It is a fantastic option for houses with little storage. Small bathrooms are a great fit for a combi boiler. A combi boiler cannot sustain many tubs or showers running at once or handle high hot water demands.

If you need more power for a bigger house, we recommend the Main Eco Compact 30kw combi boiler for you.

Even though dependability and quality are crucial factors to take into account when buying a boiler, the Main Eco Compact Combi boiler is incredibly economical. It has a lot of wonderful features and is quite energy efficient. For a combi, the warranty is really good.

The problem:

According to the most recent Which? study. Engineers give Main gas boilers a 3-star rating and think that fixing and maintaining them is not too difficult. Customers, however, only gave Main boilers 2 stars, which is, to put it mildly, concerning. The overall Which brand score for Main boilers is 48%, which is not the lowest score we’ve ever seen even if it is far lower than some major brands like Worcester Bosch.

The brand data results for Main gas boilers can be found below. We obtained these data from the Which? website.

The main eco-compact 25kw combination boilers

  • new boiler cost less than other brands
  • These are great for small and medium-sized homes
  • It can fit in a small cupboard
  • Easy installation, use, and maintenance.
  • Boiler Plus certified Energy Saving Trust approved
  • Low NOx emissions Class 5
  • Maximize energy efficiency, reduce carbon emissions
  • Compatible with Baxi uSense smart heating thermostat – Use smart devices to control heating
  • Optional central flue stand


  • A 5-year warranty is available for this product only
  • Although not the most well-respected in recent years, it has seen a significant improvement in recent years.

Main Eco Compact 25kw combi-boiler price

This new combi boiler is popular because it is so affordable. This boiler can be purchased for as low as £600 and fully installed by a Gas Safe registered technician. This boiler has many benefits, including its compact size. However, if you want a boiler that is more durable and offers a longer warranty (up to 10 years), there are options.

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