Head to head
Glow-worm Energy Combi 25C 25kW vs Samsung EHS Mono HT Quiet 12.0kW
The Glow-worm Energy Combi 25C 25kW is a gas combi boiler, 25.7 kw hot water output. The Samsung EHS Mono HT Quiet 12.0kW is a r32 monobloc air source heat pump, 12.0 kw heat output.
Last reviewed 13 September 2026
Specifications side by side
| Glow-worm Energy Combi 25C 25kW | Samsung EHS Mono HT Quiet 12.0kW | |
|---|---|---|
| Dimensions | 700 x 390 x 280 mm | 1018 x 1270 x 530 mm (H x W x D) |
| Weight | 32 kg | 137 kg |
| Hot water output | 25.7 kW | - |
| Central heating output | 18 kW | - |
| ErP class | A | - |
| Seasonal efficiency | 94% | - |
| Warranty | 7 years | - |
| Hot water flow rate | 10.4 litres per minute | - |
| Heat output | - | 12.0 kW |
| SCOP | - | 4.90 (35C flow), 3.78 (55C flow) |
| Refrigerant | - | R32, 3.3 kg charge |
| Sound pressure | - | 46 dB(A) standard, 35 dB(A) night mode |
| Max flow temperature | - | 70C |
Sources: Glow-worm Energy Combi 25C 25kW, Samsung EHS Mono HT Quiet 12.0kW. Figures vary by model year and options, so check with the supplier before you commit.
Buy or hire the Energy Combi 25C 25kW if...
A gas combi boiler with 25.7 kW of hot water output, sized for a flat or small house with one bathroom. It delivers about 10.4 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 25C 25kW specifications →Buy or hire the EHS Mono HT Quiet 12.0kW if...
A 12.0kW unit for a larger house, with the highest SCOP quoted across the EHS Mono HT Quiet range at 4.90 on a 35C flow. It shares the same cabinet size as the 8kW model but weighs 11 kg more for the larger compressor.
Full EHS Mono HT Quiet 12.0kW specifications →Common questions
What is the difference between the Glow-worm Energy Combi 25C 25kW and the Samsung EHS Mono HT Quiet 12.0kW?
The Glow-worm Energy Combi 25C 25kW is a gas combi boiler, 25.7 kW hot water output; the Samsung EHS Mono HT Quiet 12.0kW is a r32 monobloc air source heat pump, 12.0 kW heat output.
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