The Joule Cyclone 125L Slimline Indirect Unvented Cylinder (TCEMVI-0125SFC) is a compact, high-quality hot water cylinder designed for installations where space is limited. With 125 litres of actual capacity, it provides reliable mains-pressure hot water storage while its slimline design makes it suitable for narrow plant rooms, cupboards and compact residential installations.
Built from LDX 2101 stainless steel with a coated mild-steel outer casing and dense PU foam insulation, the cylinder is designed for durable performance and reduced standby heat loss. Its 316L stainless steel coil provides indirect heat transfer from a boiler, heat pump or solar thermal primary, while the 19 kW coil and 0.56 m² surface area support efficient domestic hot water heating.
125 L Actual Capacity
Indirect Unvented
19 kW Coil
1 Year Warranty
Max Mains Pressure
10 bar
Applications & suitability
Small Homes & Apartments
A compact 125 L indirect unvented cylinder for smaller residential properties, flats and apartments.
Space-Limited Installations
Slimline construction is suited to narrow plant rooms, cupboards and installations where space is restricted.
Indirect Heating Systems
Designed for indirect heating from boilers, heat pumps or solar thermal primary systems.
Retrofit & Renovation
A compact stainless-steel hot water storage option for renovation and retrofit projects.
Key specifications
| Model |
TCEMVI-0125SFC |
| Brand |
CYCLONE |
| Capacity (L) |
120 (rated) |
| Actual capacity (Ltr) |
125 |
| Product Group Code |
INDIRECT |
| Item Category Code |
Stainless |
| ERP Type |
IndirectUnvented |
| Cylinder material |
LDX 2101 (stainless steel) |
| Outer casing |
Coated mild steel |
| Thermal insulation |
Dense PU foam |
| Foam thickness (mm) |
0 |
| No immersions |
1 |
| Immersion spec |
3 kW @ 230 V |
| Coil material |
316L stainless steel |
| No heat exchangers |
1 |
| Coil 1 rating (kW) |
19 |
| Coil 1 surface area (m²) |
0.56 |
| Coil 1 max primary pressure (bar) |
3.5 |
| Coil 1 resistance (Bar) |
0.05 |
| Max mains water pressure (bar) |
10 |
| Operating pressure (bar) |
7 |
| Operating temp (°C) |
60 |
| Safety valve temp (°C) |
90 |
| Unit weight empty (kg) |
30 |
| Unit weight full (kg) |
137 |
| Heat loss (kWh/24h) |
1.56 |
| Tested to standard |
BS EN 12897:2016 |
| Warranty terms (years) |
1Y |
Installation & compatibility
Indirect heating compatibility: The Joule Cyclone 125L is designed for indirect unvented hot water systems using a primary heat source such as a boiler, heat pump or solar thermal system. The 316L stainless steel coil has a 19 kW rating, 0.56 m² surface area, maximum primary pressure of 3.5 bar and resistance of 0.05 bar.
Design & performance benefits
LDX 2101 Stainless Steel
The cylinder uses LDX 2101 stainless steel construction for durable hot water storage and corrosion resistance.
316L Stainless Steel Coil
A 316L stainless steel primary coil provides indirect heat transfer with a 19 kW rating and 0.56 m² surface area.
Dense PU Insulation
Dense polyurethane foam insulation supports reduced standby heat loss, with a stated heat loss of 1.56 kWh/24h.
Compact Slimline Format
The slimline format is suited to cupboards, narrow plant rooms and other installations where available space is limited.
Additional installation features
Mains Pressure System
Maximum mains water pressure is rated at 10 bar, with an operating pressure of 7 bar.
Electric Auxiliary Heating
One immersion provision is specified, with a 3 kW @ 230 V immersion specification.
Tested Standard
The cylinder is tested to BS EN 12897:2016 and supplied with a 1-year warranty.
Ideal for
Compact Residential Properties
Small homes, flats and apartments requiring 125 L of indirect hot water storage.
Narrow Plant Rooms
Suitable for cupboard, under-bench and narrow plant-room applications where a slimline cylinder is required.
Boiler & Heat Pump Systems
Designed for indirect primary heating from boilers, heat pumps or solar thermal loops.
Retrofit & Renovation Projects
A compact stainless-steel option for projects where space, heat loss and durable construction are key considerations.
The Joule Cyclone 125L Slimline Indirect Unvented Cylinder (TCEMVI-0125SFC) combines a compact slimline format with stainless-steel construction, a 19 kW 316L primary coil and dense PU foam insulation. With 125 L actual capacity, 10 bar maximum mains pressure and compatibility with boiler, heat pump and solar thermal primary systems, it is a practical choice for compact indirect hot water installations.
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