Head to head
Samsung EHS Mono HT Quiet 12.0kW vs Viessmann Vitodens 100-W 35kW combi
The Samsung EHS Mono HT Quiet 12.0kW is a r32 monobloc air source heat pump, 12.0 kw heat output. The Viessmann Vitodens 100-W 35kW combi is a gas combi boiler, 34.9 kw hot water output.
Last reviewed 13 September 2026
Specifications side by side
| Samsung EHS Mono HT Quiet 12.0kW | Viessmann Vitodens 100-W 35kW combi | |
|---|---|---|
| Dimensions | 1018 x 1270 x 530 mm (H x W x D) | 700 x 400 x 360 mm |
| Weight | 137 kg | 35 kg |
| 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 | - |
| Hot water output | - | 34.9 kW |
| Central heating output | - | 32 kW |
| ErP class | - | A |
| Seasonal efficiency | - | 98% |
| Warranty | - | 5 years |
| Hot water flow rate | - | 17 litres per minute |
Sources: Samsung EHS Mono HT Quiet 12.0kW, Viessmann Vitodens 100-W 35kW combi. Figures vary by model year and options, so check with the supplier before you commit.
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 →Buy or hire the Vitodens 100-W 35kW combi if...
A gas combi boiler with 34.9 kW of hot water output, sized for a larger house with two bathrooms. It delivers about 17 litres per minute of hot water, which decides how well a shower runs while a tap is on. Warranty: 5 years. Seasonal efficiency is 98%.
Full Vitodens 100-W 35kW combi specifications →Common questions
What is the difference between the Samsung EHS Mono HT Quiet 12.0kW and the Viessmann Vitodens 100-W 35kW combi?
The Samsung EHS Mono HT Quiet 12.0kW is a r32 monobloc air source heat pump, 12.0 kW heat output; the Viessmann Vitodens 100-W 35kW combi is a gas combi boiler, 34.9 kW hot water output.
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