Head to head
Joule Cyclone 200L Indirect vs Telford Tempest 170 Direct
The Joule Cyclone 200L Indirect is a indirect unvented hot water cylinder, 200 litres. The Telford Tempest 170 Direct is a direct unvented hot water cylinder, 170 litres.
Last reviewed 13 September 2026
Specifications side by side
| Joule Cyclone 200L Indirect | Telford Tempest 170 Direct | |
|---|---|---|
| Capacity | 200 litres | 170 litres |
| Dimensions | 1490 mm high x 540 mm diameter | 1200 mm high x 510 mm diameter (approx.) |
| Weight | 47 kg | 40 kg empty, 208 kg full |
| Material | Duplex stainless steel | - |
| ErP rating | C | - |
| Immersion heater | - | 2 x 3kW, 240V single phase |
| Max inlet pressure | - | 3 bar (inlet control group) |
| Warranty | - | Lifetime guarantee on the cylinder (25 years internal), 2 years on components |
Sources: Joule Cyclone 200L Indirect, Telford Tempest 170 Direct. 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 Tempest 170 Direct if...
A 170 litre direct unvented cylinder from Telford's Tempest range, built in duplex stainless steel with twin 3kW immersions rather than a boiler coil. It suits an all-electric property, and the cylinder body carries a lifetime guarantee when serviced annually.
Full Tempest 170 Direct specifications →Common questions
What is the difference between the Joule Cyclone 200L Indirect and the Telford Tempest 170 Direct?
The Joule Cyclone 200L Indirect is a indirect unvented hot water cylinder, 200 litres; the Telford Tempest 170 Direct is a direct unvented hot water cylinder, 170 litres.
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