The Joule Cyclone Air Direct 125L Unvented Cylinder is designed to provide efficient domestic hot water for taps, showers and other hot water outlets. With a 125-litre capacity, two 3kW heating elements and a 46-minute recovery time, this direct unvented cylinder provides a practical hot water solution for domestic applications.
Part of the Joule Cyclone Air range, the cylinder features an internal expansion vessel similar to the Megaflo-style arrangement. This creates a neat and efficient installation without the need for additional pipework for a separate expansion vessel. The direct design heats domestic hot water but does not provide heating for radiators.
125L Capacity
Direct Model
Internal Expansion Vessel
2 × 3kW Elements
46 Min Recovery
Key Highlights
1 Year
Manufacturer Warranty
Applications & Suitability
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Domestic hot water: Designed to provide hot water for taps, showers and sinks.
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Direct heating: The direct model heats domestic hot water without providing heat for radiators.
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Pressurised hot water: The unvented system design provides a pressurised hot water cylinder.
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Compact installation: The internal expansion vessel removes the need for additional pipework for a separate expansion vessel.
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Domestic properties: Suitable where stored domestic hot water is required without radiator heating from the cylinder.
Key Specifications
| Product |
Joule Cyclone Air Direct 125L Unvented Cylinder |
| Range |
Joule Cyclone Air |
| Capacity |
125 L |
| Power |
6000 W |
| Heating Elements |
2 × 3 kW |
| Recovery Time |
46 minutes |
| Venting |
Unvented |
| Manufacturer |
Joule |
| Manufacturer Warranty |
1 Year |
| Expansion Vessel |
Internal |
| Model Type |
Direct |
| Height |
1005 mm |
| Width |
540 mm |
| Depth |
540 mm |
Internal Expansion Vessel
Integrated expansion vessel: The Joule Cyclone Air range features an internal expansion vessel, creating a neat and efficient cylinder installation.
Reduced installation pipework: With the expansion vessel located internally, there is no need for additional pipework for a separate expansion vessel.
Direct Hot Water Heating
The Joule Cyclone Air Direct 125L is designed specifically for heating domestic hot water. It supplies hot water to taps, showers and sinks, but does not heat radiators. Where hot water for radiators is required, an indirect cylinder with a suitable boiler or a combi boiler would be required.
2 × 3kW Elements
Two heating elements provide a combined stated power of 6000W for heating the stored water.
46-Minute Recovery
The stated 46-minute recovery time helps replenish hot water following periods of demand.
125L Capacity
Provides 125 litres of stored domestic hot water capacity.
Installation & Dimensions
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Height: 1005 mm
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Width: 540 mm
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Depth: 540 mm
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Unvented design: Designed as a pressurised hot water cylinder.
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Internal expansion vessel: Helps create a neat installation without additional pipework for an external expansion vessel.
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Professional installation: Electrical supply, controls and installation should be completed by a suitably qualified installer.
How to Use
- Ensure the cylinder is powered through the correct electrical supply and controls, typically using the programmer/thermostat system installed with the cylinder.
- Set the hot water temperature using the system controls as supplied and installed by your installer.
- Use hot water normally from sinks, showers and taps, with hot water drawn directly from the cylinder.
- After heavy hot water usage, allow approximately 46 minutes for the cylinder to recover.
- If hot water becomes inconsistent, check that the heating schedule or programmer is switched on and correctly configured.
Ideal For
- Domestic hot water applications
- Homes requiring 125-litre hot water storage
- Taps, showers and sinks
- Installations requiring an internal expansion vessel
- Properties where a neat, efficient unvented cylinder installation is preferred
- Applications requiring two electric heating elements
Frequently Asked Questions
What is the capacity of the Joule Cyclone Air Direct cylinder?
The cylinder has a 125-litre capacity.
Is this cylinder direct or indirect?
This is a Direct cylinder designed to heat domestic hot water for taps, showers and sinks. It does not heat radiators.
Does the cylinder have an internal expansion vessel?
Yes. The Joule Cyclone Air range features an internal expansion vessel, helping provide a neat installation without additional pipework for a separate expansion vessel.
How many heating elements does the cylinder have?
It has two 3kW heating elements, providing a total stated power of 6000W.
How long does the cylinder take to recover?
The stated recovery time is approximately 46 minutes.
What are the dimensions of the cylinder?
The cylinder measures 1005 mm high × 540 mm wide × 540 mm deep.
What warranty is provided?
The supplied specification states a 1-year manufacturer warranty.
Joule Cyclone Air Direct 125L Unvented Cylinder provides an efficient domestic hot water solution with a 125-litre capacity, internal expansion vessel, two 3kW heating elements and 46-minute recovery time. Its direct configuration is designed for taps, showers and sinks, while the integrated expansion vessel helps create a neat and efficient installation.
