Head to head
Joule Cyclone 200L Indirect vs NIBE S2125 Model 8
The Joule Cyclone 200L Indirect is a indirect unvented hot water cylinder, 200 litres. The NIBE S2125 Model 8 is a air/water heat pump, up to 5.4 kw heat output.
Last reviewed 13 September 2026
Specifications side by side
| Joule Cyclone 200L Indirect | NIBE S2125 Model 8 | |
|---|---|---|
| Dimensions | 1490 mm high x 540 mm diameter | 1070 x 1130 x 820 mm (H x W x D) |
| Weight | 47 kg | 150 kg |
| Capacity | 200 litres | - |
| Material | Duplex stainless steel | - |
| ErP rating | C | - |
| Heat output | - | 5.33 kW (average climate), 5.4 kW (cold climate) |
| SCOP | - | 5.0 at 35C, 3.7 at 55C (average climate); 4.1 at 35C, 3.2 at 55C (cold climate) |
| Sound power | - | 49 dB(A) at nominal rating (EN12102) |
| Max flow temperature | - | up to 75C |
Sources: Joule Cyclone 200L Indirect, NIBE S2125 Model 8. Figures vary by model year and options, so check with the supplier before you commit.
Buy or hire the Cyclone 200L Indirect if...
A 200 litre indirect cylinder from Joule's Cyclone range, built in duplex stainless steel with a high recovery coil for use with a boiler or heat pump. It suits a three or four-bed house with a standard hot water demand.
Full Cyclone 200L Indirect specifications →Buy or hire the S2125 Model 8 if...
A smaller NIBE S2125 rated to keep working in cold climates, reaching up to 65C flow even at -25C outdoors. It suits a smaller house where cold-weather reliability matters more than raw output.
Full S2125 Model 8 specifications →Common questions
What is the difference between the Joule Cyclone 200L Indirect and the NIBE S2125 Model 8?
The Joule Cyclone 200L Indirect is a indirect unvented hot water cylinder, 200 litres; the NIBE S2125 Model 8 is a air/water heat pump, up to 5.4 kW heat output.
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