Glow-worm is a UK brand which since 2001 has been part of the Vaillant Group, a family-owned international company with headquarters in Remscheid, Germany. Glow-worm has been making boilers since 1934 and its production plant is located in Belper, Derbyshire.
Glow-worm supplies a range of heating products including gas boilers, hot water cylinders, boiler controls as well as solar water heating panels and heat pumps.
Under the Glow-worm brand, there are a number of domestic boilers available. The last two digits of Glow-worm boiler codes indicate the output in kW.
View Glow-worm Boiler Range Details & Pricing:
Glow-worm Boiler Warranty
The warranty cover offered by Glow-worm varies by boiler range and can be extended subject to conditions. Warranty varies from 1 to 7 years, depending on range. Check with your installer for specific details. Also see the Glow-worm Guarantee Terms & Conditions.
Combi Boilers Summary
| Combination Boiler Range | Power Outputs kW | Warranty years |
| Glow-worm Betacom4 | 24, 30 | 5 |
| Glow-worm Energy | 25, 30, | 7 |
| Glow-worm Energy 35 Store | 35 | 7 |
| Glow-worm Ultimate | 30, 35 | 5 |
Glow-worm Combination Boiler Prices
| Power Output | Product | Typical price inc VAT | Warranty Period Years * | Technical Details |
|---|---|---|---|---|
| 24kW | Glow-worm Betacom4 24kW Combination | £498.75 | 5 | View |
| 25kW | Glow-worm Energy 25kW Combination | £801.85 | 7 | View |
| 30kW | Glow-worm Betacom4 30kW Combination | £584.58 | 5 | View |
| 30kW | Glow-worm Energy 30kW Combination | £901.93 | 7 | View |
| 30kW | Glow-worm Ultimate 3 30kW Combination | £711.51 | 5 | View |
| 35kW | Glow-worm Energy 35 Store Combination | £1,732.86 | 7 | View |
| 35kW | Glow-worm Energy 35kW Combination | £1,024.25 | 7 | View |
| 35kW | Glow-worm Ultimate 3 35kW Combination | £776.41 | 5 | View |
* subject to specific terms and conditions.
System Boilers Summary
| System Boiler Range | Power Outputs kW | Warranty years |
| Glow-worm Energy system | 12, 15, 18, 25, 30, | 7 |
| Glow-worm Ultimate3 system | 25 | 5 |
Glow-worm System Boiler Prices
| Power Output | Product | Typical price inc VAT | Warranty Period Years * | Technical Details |
|---|---|---|---|---|
| 12kW | Glow-worm Energy 12kW system | £795.91 | 7 | View |
| 15kW | Glow-worm Energy 15kW system | £816.34 | 7 | View |
| 18kW | Glow-worm Energy 18kW system | £851.21 | 7 | View |
| 25kW | Glow-worm Energy 25kW system | £907.60 | 7 | View |
| 25kW | Glow-worm Ultimate 3 25kW system | £767.50 | 5 | View |
| 30kW | Glow-worm Energy 30kW system | £936.54 | 7 | View |
* subject to specific terms and conditions.
Heat Only Boilers (Open Vent Boilers) Summary
| Heat Only Boiler Range | Power Outputs kW | Warranty years |
| Glow-worm Energy regular | 12, 15, 18, 25, 30, | 7 |
| Glow-worm Ultimate3 regular | 25 | 5 |
Glow-worm Heat Only Boiler Prices
| Power Output | Product | Typical price inc VAT | Warranty Period Years * | Technical Details |
|---|---|---|---|---|
| 12kW | Glow-worm Energy 12kW regular | £786.99 | 7 | View |
| 15kW | Glow-worm Energy 15kW regular | £806.78 | 7 | View |
| 18kW | Glow-worm Energy 18kW regular | £847.99 | 7 | View |
| 25kW | Glow-worm Energy 25kW regular | £883.99 | 7 | View |
| 25kW | Glow-worm Ultimate 3 25kW regular | £802.94 | 5 | View |
| 30kW | Glow-worm Energy 30kW regular | £927.93 | 7 | View |
*subject to specific terms and conditions.
If you want an indication of what you may pay for an Glow Worm gas boiler then use our replacement boiler cost online calculator. You can then compare any quotations from installers with our guideline estimate.
Prices last updated: April 2019
Katerina says
January 16, 2019 at 11:10 amGood morning.
We would like to buy boiler GLOW WORM ULTRACOM SXI 18 KW
What is the price for it?