✔ Glow-worm is committed to “top quality, reliability and exceptional durability”
✔ Glow-worm boilers typically cost between £550 and £1,800
✔ The British company has been supplying boilers since 1934
Researching new boiler costs and trying to find the boiler that best suits your home? It’s no easy task, but we’re here to help by reviewing the biggest boiler manufacturers around.
We’ve covered Glow-worm boilers here, looking at the costs, benefits, and reviews.
Read on to find out more, or you can skip the reading and head straight to our details form. Once you’ve entered your details, you can look forward to receiving free quotes from local installers.
What’s on this page?
01| How much will a Glow-worm boiler cost?
02| Glow-worm combi boiler prices
03| Glow-worm system boiler prices
04| Review of Glow-worm boilers
05| How do you buy a Glow-worm boiler?
06| What next?
How much will a Glow-worm boiler cost?
Glow-worm is a British company that’s been in operation since 1934. It’s now owned by the Vaillant Group, and produces a range of boilers across three types: combi, system and heat-only.
The prices of these vary according to the different size and capability levels of each, ranging from £550 to £1,800, excluding installation, which typically costs another £1,000 to £3,000.
The cheapest in the range is the Ultimate2 30c combi boiler, and the most expensive is the Ultimate2 35c combi. The majority of its system boilers are priced around the £1,100 mark.
The table below shows the typical price of Glow-worm’s cheapest and most expensive combi and system boilers.
| Type of Glow-worm Boiler | Price of Cheapest Boiler | Price of Most Expensive Boiler |
| Combi | £967 | £1,165 |
| System | £1,140 | £1,145 |
Click here for more information about average boiler prices and installation costs.
Glow-worm combi boiler prices
A combination or ‘combi’ boiler heats water directly from the mains when you turn on a tap. This means that unlike a heat-only or regular boiler, you won’t need a separate hot water storage cylinder or a cold water storage tank.
Combi boilers tend to produce good shower pressure and are also more cost- and energy-efficient, as the water is heated instantly, rather than being stored in a cylinder.
Glow-worm has a range of combi boilers. As mentioned above, the cheapest in the range is the Ultimate2 30c combi boiler, at £967, and the most expensive is Ultimate2 35c, at £1,165.
The table below compares the key product information of Glow-worm’s top combi boilers, including price.
| Glow-worm Combi Boiler | Fuel | Size (heat output in kW) | ErP Efficiency (water heating) | Typical Price |
| Ultimate2 30c | Gas | 30;35 | A | £967 |
| Betacom3 24c | Gas | 24;30 | A | £985 |
| ENERGY 35c – A (H-GB) | Gas | 25;30;35 | A | £1,144 |
| Ultimate2 35c | Gas | 30;35 | A | £1,165 |
Find out whether a combi boiler is suitable for your household by reading our guide to the best boilers.
Glow-worm system boiler prices
System boilers have heating and hot water components built-in, so there is no need for an extra water tank, although it does require a cylinder for storing hot water.
They are also compatible with solar water heating systems, which present environmental benefits and energy bill savings.
Glow-worm’s Energy ErP A-rated system boilers cost approximately £841, and are available in sizes: 12, 15, 18, 25, 30kW. They are compact in design with a rear flue option, enabling them to fit in compact spaces in the home.
The table below compares the top system boilers we recommend from Glow-worm.
| Glow-worm System Boiler | Fuel | Size (heat output in kW) | ErP Efficiency (water heating) | Typical Price |
| ENERGY 12s – A (H-GB) | Gas | 12;15;18;25;30 | n/a | £1,140.00 |
| ENERGY 18s – A (H-GB) | Gas | 12;15;18;25;30 | n/a | £1,150.00 |
| ENERGY 30s – A (H-GB) | Gas | 12;15;18;25;30 | n/a | £1,160.00 |
| Ultimate2 35c | Gas | 30;35 | B | £1,165.00 |
See also:
Review of Glow-worm boilers
Glow-worm has a 4.6-star rating on Trustpilot, which is based on over 2,000 customer reviews
The company produces all three types of boiler – combi, regular, and system – although they only produce gas-fuelled models.
Glow-worm models are generally considered less reliable than those made by more established brands, such as Worcester Bosch and Viessmann, but they’re generally very affordable and come with good customer service.
See reviews and prices for other popular boiler brands:
How do you buy a Glow-worm boiler?
Selecting the right boiler will first require an assessment of your home’s credentials, which is why it’s so great that Glow-worm has a list of trusted engineers who are trained in their range of products, and who are registered with a competent person’s scheme such as Gas Safe.
You can begin the process by going to Glow-worm’s website and entering your details there.
A local engineer who is trained in Glow-worm installations will then contact you to gather information and provide you with an accurate quote.
What next?
So, there you have it — all you could possibly want to know about Glow-worm boilers.
Once you’ve decided whether Glow-worm is the right brand for you, head over to our short form, and pop in your details. Once you’ve done this, our local professional installers will get in touch with free boiler quotes. Happy heating!
