Head to head
Joule Cyclone Air 150L Direct vs Samsung EHS Mono HT Quiet 12.0kW
The Joule Cyclone Air 150L Direct is a direct unvented hot water cylinder, 150 litres. 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
| Joule Cyclone Air 150L Direct | Samsung EHS Mono HT Quiet 12.0kW | |
|---|---|---|
| Dimensions | 1196 x 540 x 540 mm (H x W x D) | 1018 x 1270 x 530 mm (H x W x D) |
| Capacity | 150 litres | - |
| Heat-up time | 57 minutes (full tank, 6kW immersion) | - |
| Immersion heater | 6kW (2 x 3kW) | - |
| Warranty | 1 year manufacturer's warranty | - |
| 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 |
| Weight | - | 137 kg |
| Max flow temperature | - | 70C |
Sources: Joule Cyclone Air 150L Direct, 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 Cyclone Air 150L Direct if...
A 150 litre direct unvented cylinder from Joule's Cyclone range, heated by twin immersion elements rather than a boiler or heat pump coil. It suits a property with electric-only heating or a holiday let, reheating a full tank in around 57 minutes.
Full Cyclone Air 150L Direct 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 Joule Cyclone Air 150L Direct and the Samsung EHS Mono HT Quiet 12.0kW?
The Joule Cyclone Air 150L Direct is a direct unvented hot water cylinder, 150 litres; 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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