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Glow-worm Energy Regular Boiler

Energy Regular

The Glow-worm Energy Regular is an energy efficient heat only boiler that is designed to suit most properties with high hot water demands.

Glow-worm’s Energy Regular series includes five models, all of which have been developed to last longer and promise to lower your energy bills. No matter the output, you’ll need to already have a traditional heating system in order for the boiler to provide plenty of heating and hot water. If you’re in need of a new boiler that offers good value for money without sacrificing on quality, this could be the perfect boiler replacement for your property.

How Much Does this Boiler Cost?

Energy Regular output options include 12kW, 15kW, 18kW, 25kW and 30kW, with the highest output being the most expensive of the five. Prices range between £780 and £900, depending on your chosen model. As you can see, the boiler has a competitive price tag compared to some of the solutions on offer from premium brands. But the price of a new boiler doesn’t stop there because you also need to consider the fitting cost, which usually starts at around £1,500. To increase your chances of saving money on these costs, you’ll need to shop around and compare prices.

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

Because the Glow-worm Energy Regular is a heat only boiler (or regular, open vent or conventional boiler) it requires a cold water tank in the loft and a hot water cylinder in the airing cupboard. The majority of people who choose a modern heat only boiler will already have these components installed. Heat only boilers are best suited to homes with more than one bathroom because they can cater for large hot water requirements. The higher the boiler output, the greater the demand the boiler can cope with.

Before choosing the Energy Regular, you’ll need to get a Gas Safe registered engineer to assess your heating and hot water needs. In addition to telling you if the boiler is a suitable replacement, a qualified engineer can determine the correct heat output for you and your home.

Is it a High Efficiency Boiler?

Yes, it is. The Energy Regular has a seasonal efficiency rating of 89.3%, making it an ErP A-rated heat only boiler that will help you to cut the cost of your fuel bills. Another benefit of this boiler is that it can be used with some of Glow-worm’s optional controls to offer the ultimate in comfort and efficiency. There are plenty of options to choose from, such as traditional plug-in timers, the Climapro2 RF wireless programmable thermostat and the intelligent MiGo app-based control.

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

The boiler has a bright LCD display and a range of controls including reset and on/off switches and adjustable heating and hot water temperatures controls. If you want to take user-control up another level, you can purchase the MiGo personal heating assistant that enables you to control your heating and hot water from a smartphone. The Energy Regular has some decent features and components, like the automotive-grade aluminium heat exchanger for example. It also comes with top and rear flue options to provide extra siting flexibility.

How long is the Warranty on this Boiler?

Glow-worm will give you a 7-year parts and labour warranty as standard when you purchase the Energy Regular. If you would prefer a longer guarantee, you’ll need to make sure you choose a Glow-worm Club Energy installer to fit the boiler.

Glow-worm Energy Regular Boiler Prices and Sizes

ModelTypeDimensionsMaximum Flow RateOutputEfficiency RatingTypical Price
Energy Regular 12RegularH – 600 mm
W – 375 mm
D – 280 mm
N/A12 kWA 90% and above£780
Energy Regular 15RegularH – 600 mm
W – 375 mm
D – 280 mm
N/A15 kWA 90% and above£810
Energy Regular 18RegularH – 600 mm
W – 375 mm
D – 280 mm
N/A18 kWA 90% and above£840
Energy Regular 25RegularH – 600 mm
W – 375 mm
D – 280 mm
N/A25 kWA 90% and above£870
Energy Regular 30RegularH – 600 mm
W – 375 mm
D – 280 mm
N/A30 kWA 90% and above£900

Summary of Important Information

  • Priced between £780 and £900
  • Heating output of 12kW, 15kW, 18kW, 25kW or 30kW
  • Dimensions of 600mm (H) x 375mm (W) x 280 (D)
  • Uses gas as its fuel source
  • A-rated for efficiency
  • Smart compatible
  • 7-year warranty as standard

Pros and Cons

The Energy Regular by Glow-worm doesn’t have any major cons, but it probably won’t be the best option for your home if you don’t currently have a system that links to a cold water tank and hot water cylinder. Don’t forget, it’s always wise to consult a Gas Safe engineer prior to choosing a new boiler. For now, we’ll leave you to weigh up all the pros and cons.


  • Fits in a kitchen cupboard
  • Suited to small, medium and large-sized homes
  • Easy to use and service
  • Ultra-quiet operation
  • High-grade aluminium heat exchanger – reliable performance
  • Provides maximum energy efficiency – reduce fuel bills and carbon emissions
  • Compatible with a range of intelligent controls – improves efficiency and performance
  • Compatible with the MiGo app-based control – maximises efficiency, learns your energy needs and allows you to manage your heating and hot water from anywhere
  • 7-year warranty


  • Glow-worm boilers have an overall Which? score of 54%
  • Requires separate cylinder and loft tanks
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