Head to head
Glow-worm Energy Combi 30C 30kW vs Viessmann Vitodens 050-W 30kW combi
The Glow-worm Energy Combi 30C 30kW comes with 4 years more warranty and has 1kW more hot water output.
Last reviewed 13 September 2026
Key differences
- Warranty: the Glow-worm Energy Combi 30C 30kW comes with 4 years more warranty.
- Hot water output: the Glow-worm Energy Combi 30C 30kW has 1kW more hot water output.
- Hot water flow rate: the Glow-worm Energy Combi 30C 30kW runs 0.3 litres a minute more hot water.
- Seasonal efficiency: the Glow-worm Energy Combi 30C 30kW is 2 points more efficient.
Specifications side by side
| Glow-worm Energy Combi 30C 30kW | Viessmann Vitodens 050-W 30kW combi | |
|---|---|---|
| Hot water output | 30.6 kW | 29.6 kW |
| Central heating output | 25 kW | 25 kW |
| ErP class | A | A |
| Seasonal efficiency | 94% | 92% |
| Dimensions | 700 x 390 x 280 mm | 700 x 400 x 300 mm |
| Weight | 33 kg | 35 kg |
| Warranty | 7 years | 3 years |
| Hot water flow rate | 12.5 litres per minute | 12.2 litres per minute |
Sources: Glow-worm Energy Combi 30C 30kW, Viessmann Vitodens 050-W 30kW combi. Figures vary by model year and options, so check with the supplier before you commit.
Buy or hire the Energy Combi 30C 30kW if...
- you want one that comes with 4 years more warranty
- you want one that has 1kW more hot water output
- you want one that runs 0.3 litres a minute more hot water
- you want one that is 2 points more efficient
A gas combi boiler with 30.6 kW of hot water output, sized for a three-bed house with one or two bathrooms. It delivers about 12.5 litres per minute of hot water, which decides how well a shower runs while a tap is on. Warranty: 7 years. Seasonal efficiency is 94%.
Full Energy Combi 30C 30kW specifications →Buy or hire the Vitodens 050-W 30kW combi if...
A gas combi boiler with 29.6 kW of hot water output, sized for a three-bed house with one or two bathrooms. It delivers about 12.2 litres per minute of hot water, which decides how well a shower runs while a tap is on. Warranty: 3 years. Seasonal efficiency is 92%.
Full Vitodens 050-W 30kW combi specifications →Common questions
What is the difference between the Glow-worm Energy Combi 30C 30kW and the Viessmann Vitodens 050-W 30kW combi?
The Glow-worm Energy Combi 30C 30kW comes with 4 years more warranty and has 1kW more hot water output. The Glow-worm Energy Combi 30C 30kW is a gas combi boiler, 30.6 kW hot water output; the Viessmann Vitodens 050-W 30kW combi is a gas combi boiler, 29.6 kW hot water output.
GetBrent is an independent directory and is not a dealer for, nor affiliated with, either manufacturer. Model and brand names are the trademarks of their owners.