Head to head
Heatrae Sadia Multipoint 50 vs Viessmann Vitocal 150-A13
The Heatrae Sadia Multipoint 50 is a electric unvented water heater, 50 litres. The Viessmann Vitocal 150-A13 is a r290 air source heat pump, 8.1 kw heat output.
Last reviewed 13 September 2026
Specifications side by side
| Heatrae Sadia Multipoint 50 | Viessmann Vitocal 150-A13 | |
|---|---|---|
| Dimensions | 1007 x 997 x 350 (V) / 371 x 371 x 350 (H) mm | 920 x 450 x 360 mm (H x W x D) (indoor unit); 841 x 1144 x 600 mm (H x W x D, single fan) (outdoor unit) |
| Capacity | 50 litres | - |
| Power | 3 kW, 230V | - |
| Heat-up time | approx. 58 minutes | - |
| Recovery time | approx. 41 minutes | - |
| Max operating pressure | 10 bar | - |
| Warranty | 2 years full warranty, 10 years on the inner cylinder | - |
| Heat output | - | 8.1 kW at A7/W35 |
| COP | - | 4.7-5.0 at A7/W35 |
| Refrigerant | - | R290 (propane), GWP 0.02 |
| Sound power | - | 51 dB(A) assessed total at A7/W55 |
| Weight | - | 162 kg (single fan) (outdoor unit) |
| Max flow temperature | - | 70C down to -10C outdoor |
Sources: Heatrae Sadia Multipoint 50, Viessmann Vitocal 150-A13. Figures vary by model year and options, so check with the supplier before you commit.
Buy or hire the Multipoint 50 if...
A 50 litre electric unvented water heater from Heatrae Sadia's Multipoint range, for a property with no boiler-fed hot water such as an outbuilding or small flat. It runs from a 3kW element and carries a 10 year warranty on the inner cylinder.
Full Multipoint 50 specifications →Buy or hire the Vitocal 150-A13 if...
A Vitocal 150-A monobloc-style split heat pump using the natural refrigerant R290, rated at 8.1kW and reaching a 70C flow for boiler-replacement work. Viessmann-trained installers can extend the standard warranty on registration.
Full Vitocal 150-A13 specifications →Common questions
What is the difference between the Heatrae Sadia Multipoint 50 and the Viessmann Vitocal 150-A13?
The Heatrae Sadia Multipoint 50 is a electric unvented water heater, 50 litres; the Viessmann Vitocal 150-A13 is a r290 air source heat pump, 8.1 kW heat output.
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