Head to head
Baxi 800 Combi 2 36kW vs Daikin Altherma 3 H HT EPRA14DV3
The Baxi 800 Combi 2 36kW is a gas combi boiler, 36 kw hot water output. The Daikin Altherma 3 H HT EPRA14DV3 is a r32 monobloc high-temperature air source heat pump, class 14.
Last reviewed 13 September 2026
Specifications side by side
| Baxi 800 Combi 2 36kW | Daikin Altherma 3 H HT EPRA14DV3 | |
|---|---|---|
| Dimensions | 700 x 390 x 285 mm | 990 x 1270 x 460 mm (H x W x D) (outdoor unit) |
| Weight | 29.5 kg | 146 kg (single-phase) (outdoor unit) |
| Hot water output | 36 kW | - |
| Central heating output | 26.4 kW | - |
| ErP class | A | - |
| Seasonal efficiency | 93% | - |
| Warranty | 10 years | - |
| Hot water flow rate | 15 litres per minute | - |
| Heat output | - | 10.17 kW (nominal heating) |
| SCOP | - | 4.51-4.71 (35C flow), 3.57-3.58 (55C flow) |
| Refrigerant | - | R32, 4.2 kg charge |
| Sound pressure | - | 43 dBA (heating) |
| Max flow temperature | - | 70C |
Sources: Baxi 800 Combi 2 36kW, Daikin Altherma 3 H HT EPRA14DV3. Figures vary by model year and options, so check with the supplier before you commit.
Buy or hire the 800 Combi 2 36kW if...
A gas combi boiler with 36 kW of hot water output, sized for a larger house with two bathrooms. It delivers about 15 litres per minute of hot water, which decides how well a shower runs while a tap is on. Warranty: 10 years. Seasonal efficiency is 93%.
Full 800 Combi 2 36kW specifications →Buy or hire the Altherma 3 H HT EPRA14DV3 if...
A high-temperature monobloc heat pump reaching a 70C flow, aimed squarely at replacing a boiler on an existing radiator system without upgrading radiators. Its class 14 size gives around 10.2kW of heat output, suiting a three or four-bed house.
Full Altherma 3 H HT EPRA14DV3 specifications →Common questions
What is the difference between the Baxi 800 Combi 2 36kW and the Daikin Altherma 3 H HT EPRA14DV3?
The Baxi 800 Combi 2 36kW is a gas combi boiler, 36 kW hot water output; the Daikin Altherma 3 H HT EPRA14DV3 is a r32 monobloc high-temperature air source heat pump, class 14.
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