The Glow-worm Ultimate₃ Boiler is an innovative model available as a regular, combi or system model. But just how ‘ultimate’ is this heating system? Read on and find out whether this could be the perfect boiler for your home.
Price (Installed): From £ (inc. VAT)
Glow-worm Ultimate₃ Boiler Technical Specification
| Manufacturer | Glow-worm |
| Model | Ultimate₃ |
| Condensing | Yes |
| Efficiency Rating | 89% |
| Energy Efficiency Class | A Rated |
| LPG Compatible | No |
| Warranty | 5-year guarantee |
| Central Heating Max. Output | 35 kW |
| Mounting | Wall Mounted |
| Weight | 22 kg |
| Dimensions | Combi & system: 740 mm (Height) x 418 (Width) x 300mm (Depth)
Regular: 600 mm (Height) x 375 (Width) x 280mm (Depth) |
The Glow-worm Ultimate₃ Boiler is available as a combi boiler in 30 kW and 35 kW, a system boiler in 25 kW and as a regular boiler in 25 kW output.
Glow-worm Ultimate₃ combi boiler flow rates
| Model | Flow Rate |
| 30 | 12.4 l/min |
| 35 | 14.4 l/min |
Glow-worm Ultimate₃ Boiler Key Features
- The Glow-worm Ultimate₃ Boiler is a fairly compact, wall-mounted boiler available as either a combi, regular or system model
- Can easily be installed in a cupboard or airing cupboard or on a wall with available space
- Granted an ‘A’ energy efficiency rating with ErP
- Simple and bright boiler control interface
- Suitable for homes with high hot water demands
- Covered by a 5-year guarantee
About the Glow-worm Ultimate₃ Boiler
- The Glow-worm Ultimate₃ Boiler is affordable and ranks well for energy efficiency and performance, which will keep your bills low
- Because of its compact design and low weight– can be installed in the kitchen, bathroom or airing cupboard
- Utilises an aluminium heat exchanger
- Manufactured in Glow-worm’s plant in Derbyshire, UK – the same plant where Vaillant’s boilers are manufactured.
Our thoughts on the Glow-worm Ultimate₃ Boiler
The Glow-worm Ultimate₃ Boiler is a very reliable boiler at a cheaper price point and is covered by an extended warranty of 5 years. It can accommodate larger homes with up to 2 bathrooms. Combi boilers are simple to install and operate, which means they are often preferred by households as they are cheaper to fix if things go wrong.
However, the regular and system models also have advantages. – mainly that they are more suited to providing hot water to homes with multiple bathrooms.
A quality boiler manufactured in the UK
The Glow-worm Ultimate₃ Boiler is designed and manufactured in Derbyshire. If you are looking for a reliable and affordable name in boiler production, engineered in the UK, this could be the ideal model for you.
While Glow-worm is known as more of a budget boiler brand, it shares its production location with its parent company, Vaillant. Due to this, it benefits from Vaillant’s innovations and manufacturing prowess.
Reduce household emissions
The threat of climate change and the need to reduce emissions is on many people’s minds. It should also be a factor when considering a boiler upgrade. Energy efficiency is something to pay close attention to, and the Glow-worm Ultimate₃ Boiler is very eco-friendly, boasting an ‘A’ ErP rating and operates at 89% efficiency. While there are more efficient boilers on the market, this is still in the top range of environmentally friendly products.
Innovative energy solutions
The Glow-worm Ultimate₃ Boiler includes a built-in filling loop for straightforward maintenance, as well as a Grundfos modulating pump for reduced energy use.
Control with ease
With a Glow-worm Ultimate₃ Boiler, there is a wide range of options available – from flues and accessories. What’s more, you can control the heating system from the LCD display with an easy-to-use interface, or invest in Glow-worm’s MiGo app-based smart controls so that you can turn your heating on and off wherever you are from your smartphone.
Wide availability of parts
Glow-worm boiler parts are available at plumbing retailers and wholesalers across the UK.