The Joule Invacyl Unvented 120L Direct Cylinder (TRBMVD-0120LFB) is a robust stainless-steel hot water storage cylinder designed for direct unvented systems. With a 120-litre capacity, it provides mains-pressure hot water for showers, taps and appliances, making it suitable for small to medium households and a range of retrofit applications.
The cylinder features an LDX 2101 stainless-steel inner cylinder, coated mild-steel outer casing and 50mm dense PU foam insulation. Two 3kW immersion heaters provide direct electric heating, while the cylinder supports a maximum mains water pressure of 10 bar and has a specified operating pressure of 7 bar. A 25-year warranty and testing to BS EN 50440:2015 provide additional product assurance.
120 Litre Capacity
Direct Unvented
2 × 3kW Immersion Heaters
25 Year Warranty
Immersion Heaters
2 × 3 kW
Applications & suitability
Small to Medium Homes
The 120-litre capacity is suited to small and medium households requiring reliable stored hot water.
Multiple Hot-Water Outlets
Designed to provide mains-pressure hot water for showers, taps and appliances.
Retrofit Projects
Suitable for renovation and retrofit projects where an unvented hot water cylinder is required.
Small Commercial Premises
A 120-litre storage option for offices and small commercial premises requiring dependable hot water storage.
Key specifications
| Product Model |
TRBMVD-0120LFB |
| Type |
Direct Unvented |
| Actual Capacity |
120 L |
| Unit Weight Empty |
26 kg |
| Unit Weight Full |
146 kg |
| Cylinder Material |
LDX 2101 Stainless Steel |
| Outer Casing |
Coated Mild Steel |
| Thermal Insulation |
Dense PU Foam |
| Foam Thickness |
50 mm |
| Number of Immersions |
2 |
| Immersion Specification |
3 kW @ 230 V |
| Maximum Mains Water Pressure |
10 bar |
| Operating Pressure (T & P) |
7 bar |
| Safety Temperature |
90°C |
| Heat Loss |
1.44 kWh/24h |
| Tested To Standard |
BS EN 50440:2015 |
| Warranty Terms |
25 Years |
Installation & compatibility
The Joule Invacyl 120L Direct Unvented Cylinder is designed for direct electric hot water heating using two immersion heater positions, with each immersion specified at 3 kW @ 230 V. The cylinder supports a maximum mains water pressure of 10 bar and a specified operating pressure of 7 bar. Installation should follow the manufacturer's requirements and applicable unvented hot water system regulations.
Design & performance benefits
Stainless Steel Construction
The LDX 2101 stainless-steel cylinder provides the specified inner vessel construction for the unvented hot water system.
50mm PU Insulation
Dense PU foam with a specified 50mm thickness helps retain stored hot water and contributes to the measured 1.44 kWh/24h heat loss.
Twin Immersion Heaters
Two immersion heaters, each specified at 3 kW @ 230 V, provide direct electric heating capability.
Mains-Pressure Hot Water
The unvented cylinder is designed to supply mains-pressure hot water, with a maximum mains water pressure of 10 bar.
Additional installation features
Coated Mild Steel Casing
The coated mild-steel outer casing provides the specified external construction and protection around the cylinder.
BS EN 50440:2015
The cylinder is specified as tested to BS EN 50440:2015.
25 Year Warranty
The product is supplied with a 25-year warranty according to the stated warranty terms.
Ideal for
Family Homes
A 120-litre capacity designed for residential hot water requirements in small to medium households.
Retrofit & Renovation
Suitable for projects replacing existing hot water storage with a direct unvented cylinder.
Kitchens & Bathrooms
Provides stored mains-pressure hot water for showers, taps and appliances across domestic installations.
Small Commercial Premises
A compact 120-litre storage solution for offices and other small commercial applications requiring hot water.
The Joule Invacyl Unvented 120L Direct Cylinder TRBMVD-0120LFB combines 120-litre hot water storage, LDX 2101 stainless-steel construction, 50mm dense PU foam insulation and two 3kW immersion heaters. With a measured heat loss of 1.44 kWh/24h, maximum mains pressure of 10 bar, 7 bar operating pressure and a 25-year warranty, it is suited to small and medium residential, retrofit and selected light-commercial hot water installations.
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🆓 Free Local Delivery (Orders £100 & above)
We offer FREE delivery on orders £100 or more
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For orders that do not qualify for free delivery, standard
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Customers can also choose to collect their order from our store in
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