Head to head
Glow-worm Energy Combi 30C 30kW vs Joule Cyclone 200L Indirect
The Glow-worm Energy Combi 30C 30kW is a gas combi boiler, 30.6 kw hot water output. The Joule Cyclone 200L Indirect is a indirect unvented hot water cylinder, 200 litres.
Last reviewed 13 September 2026
Specifications side by side
| Glow-worm Energy Combi 30C 30kW | Joule Cyclone 200L Indirect | |
|---|---|---|
| Dimensions | 700 x 390 x 280 mm | 1490 mm high x 540 mm diameter |
| Weight | 33 kg | 47 kg |
| Hot water output | 30.6 kW | - |
| Central heating output | 25 kW | - |
| ErP class | A | - |
| Seasonal efficiency | 94% | - |
| Warranty | 7 years | - |
| Hot water flow rate | 12.5 litres per minute | - |
| Capacity | - | 200 litres |
| Material | - | Duplex stainless steel |
| ErP rating | - | C |
Sources: Glow-worm Energy Combi 30C 30kW, Joule Cyclone 200L Indirect. Figures vary by model year and options, so check with the supplier before you commit.
Buy or hire the Energy Combi 30C 30kW if...
A gas combi boiler with 30.6 kW of hot water output, sized for a three-bed house with one or two bathrooms. It delivers about 12.5 litres per minute of hot water, which decides how well a shower runs while a tap is on. Warranty: 7 years. Seasonal efficiency is 94%.
Full Energy Combi 30C 30kW specifications →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 →Common questions
What is the difference between the Glow-worm Energy Combi 30C 30kW and the Joule Cyclone 200L Indirect?
The Glow-worm Energy Combi 30C 30kW is a gas combi boiler, 30.6 kW hot water output; the Joule Cyclone 200L Indirect is a indirect unvented hot water cylinder, 200 litres.
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