Head to head
Joule Cyclone 200L Indirect vs Telford Tempest 300 Indirect
The Joule Cyclone 200L Indirect is a indirect unvented hot water cylinder, 200 litres. The Telford Tempest 300 Indirect is a indirect unvented hot water cylinder, 300 litres.
Last reviewed 13 September 2026
Specifications side by side
| Joule Cyclone 200L Indirect | Telford Tempest 300 Indirect | |
|---|---|---|
| Capacity | 200 litres | 300 litres |
| Dimensions | 1490 mm high x 540 mm diameter | 1750 mm high x 580 mm diameter |
| Weight | 47 kg | 61 kg |
| Material | Duplex stainless steel | 2304 duplex stainless steel |
| ErP rating | C | - |
| Relief valve setting | - | 7 bar / 90C |
| Immersion heater | - | 3kW, 240V single phase, included |
| Warranty | - | Lifetime guarantee on the body with annual service, 2 year component guarantee |
Sources: Joule Cyclone 200L Indirect, Telford Tempest 300 Indirect. 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 300 Indirect if...
A 300 litre indirect cylinder for a larger household or a property with high simultaneous hot water demand, part of Telford's Tempest range. Like the smaller direct model it carries a lifetime body guarantee when serviced annually.
Full Tempest 300 Indirect specifications →Common questions
What is the difference between the Joule Cyclone 200L Indirect and the Telford Tempest 300 Indirect?
The Joule Cyclone 200L Indirect is a indirect unvented hot water cylinder, 200 litres; the Telford Tempest 300 Indirect is a indirect unvented hot water cylinder, 300 litres.
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