Head to head
Vaillant aroTHERM plus 5kW vs Viessmann Vitodens 050-W 35kW combi
The Vaillant aroTHERM plus 5kW is a r290 monobloc air source heat pump, 5 kw heat output. The Viessmann Vitodens 050-W 35kW combi is a gas combi boiler, 34.2 kw hot water output.
Last reviewed 13 September 2026
Specifications side by side
| Vaillant aroTHERM plus 5kW | Viessmann Vitodens 050-W 35kW combi | |
|---|---|---|
| Dimensions | 965 x 1100 x 450 mm (H x W x D) | 700 x 400 x 300 mm |
| Heat output | 5 kW | - |
| SCOP | up to 5.03 | - |
| Refrigerant | R290 (propane), low GWP | - |
| Sound power | 53 dB(A) at A7/W35, 58 dB(A) at A7/W55 | - |
| Weight | 128 kg (operating) | - |
| Max flow temperature | 75C | - |
| Hot water output | - | 34.2 kW |
| Central heating output | - | 32 kW |
| ErP class | - | A |
| Seasonal efficiency | - | 93% |
| Warranty | - | 3 years |
| Hot water flow rate | - | 14.1 litres per minute |
Sources: Vaillant aroTHERM plus 5kW, Viessmann Vitodens 050-W 35kW combi. Figures vary by model year and options, so check with the supplier before you commit.
Buy or hire the aroTHERM plus 5kW if...
The smallest aroTHERM plus, sized for a well-insulated flat or small house. It uses the natural refrigerant R290 rather than an F-gas, and reaches a 75C flow temperature, which helps it work with existing radiators on a retrofit job.
Full aroTHERM plus 5kW specifications →Buy or hire the Vitodens 050-W 35kW combi if...
A gas combi boiler with 34.2 kW of hot water output, sized for a larger house with two bathrooms. It delivers about 14.1 litres per minute of hot water, which decides how well a shower runs while a tap is on. Warranty: 3 years. Seasonal efficiency is 93%.
Full Vitodens 050-W 35kW combi specifications →Common questions
What is the difference between the Vaillant aroTHERM plus 5kW and the Viessmann Vitodens 050-W 35kW combi?
The Vaillant aroTHERM plus 5kW is a r290 monobloc air source heat pump, 5 kW heat output; the Viessmann Vitodens 050-W 35kW combi is a gas combi boiler, 34.2 kW hot water output.
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