Joule Cyclone Plus Direct Slim Unvented Hot Water Cylinder 90L 120L 150L 180L 210L
The Joule Cyclone Plus Direct Slim is a direct electric unvented hot water cylinder engineered for homes and apartments where space is tight but performance cannot be compromised. Available in five capacities — 90L, 120L, 150L, 180L and 210L — its reduced slimline 475 mm diameter lets it fit into airing cupboards, plant rooms and loft spaces that defeat standard-sized cylinders. Built from Duplex LDX 2101 stainless steel and tested to BS EN 12897:2016, it delivers full mains-pressure hot water to single or multiple outlets with a market-leading 25-year cylinder warranty.
The cylinder vessel is fabricated from Duplex LDX 2101 stainless steel — a grade chosen for its excellent corrosion resistance and mechanical strength. It handles both soft and moderately hard UK water supplies, and carries the full 25-year manufacturer's warranty against faulty materials and manufacture.
At 475 mm diameter, this range is narrower than standard hot water cylinders. That reduction in footprint makes it the natural choice for conversions, loft rooms, narrow cupboards, and apartment risers where a full-width cylinder simply won't fit — without sacrificing capacity or pressure.
Each cylinder leaves the factory with a 3 kW Incoloy immersion heater already installed and tested at 230 V. Incoloy resists scale build-up better than copper elements and is Joule's standard choice for long service life. The heater is controlled by a dual-stat assembly with a high-limit thermal cut-out for safety.
Unlike vented cylinders that rely on a cold-water storage tank, unvented systems connect directly to the mains cold supply. This delivers fast-flowing, high-pressure hot water to every tap and shower simultaneously — no pump required, no gravity-fed trickle from the top-floor bathroom.
The cylinder is wrapped in dense, high-efficiency polyurethane foam insulation with an ODP of 0 and GWP of 1 — the most environmentally benign foam insulation class available. This translates to a measured heat loss of 1.68 kWh/24h (150 L model, per ErP data), keeping running costs low between heating cycles.
Every cylinder is supplied with a full G3 unvented kit: inlet control group (including pressure-reducing valve, non-return valve, expansion relief valve and line strainer), expansion vessel and hose, temperature & pressure relief valve, tundish, and dual cylinder thermostat with high-limit cut-out. No chasing separate components.
The cylinder is finished in a clean white outer casing — the same aesthetic language as modern white goods — with a grey polycarbonate T&P safety cover. It looks at home in utility rooms, en-suite cupboards, and any installation where appearance matters.
The factory-fitted immersion heater connects to standard UK time-switch and thermostat controls, and is also compatible with solar PV immersion diverters (such as myenergi eddi or similar). Owners with solar panels can divert surplus generation into the cylinder for free hot water — no extra hardware needed on the cylinder side.
| Parameter | 90 L | 120 L | 150 L | 180 L | 210 L |
|---|---|---|---|---|---|
| Capacity (L) | 90 | 120 | 150 | 180 | 210 |
| Diameter (mm) | 475 (all models) | ||||
| Height A (mm) | ~936 | ~1205 | 1360 | ~1469 | ~1712 |
| Immersion heater | 3 kW Incoloy @ 230 V (factory-fitted) | ||||
| Max mains working pressure | 10 bar | ||||
| Operating pressure (T&P) | 7 bar | ||||
| Safety temperature cut-out | 90 °C | ||||
| Heat loss (150 L) | 1.68 kWh/24 h (ErP) | ||||
| Cylinder material | Duplex LDX 2101 stainless steel | ||||
| Insulation | Dense PU foam, CFC/HCFC-free, ODP 0, GWP 1 | ||||
| Test standard | BS EN 12897:2016 | ||||
| Cylinder warranty | 25 years (controls/components: 2 years) | ||||
Who can install an unvented hot water cylinder?
What is the difference between a Direct and Indirect unvented cylinder?
What size cylinder do I need?
Can I connect a solar PV diverter or solar thermal to this cylinder?
How often does an unvented cylinder need servicing?
What water quality is required to maintain the Joule warranty?
Original: $1,218.75
-65%$1,218.75
$426.56More Images
Joule Cyclone Plus Direct Slim Unvented Hot Water Cylinder 90L 120L 150L 180L 210L
The Joule Cyclone Plus Direct Slim is a direct electric unvented hot water cylinder engineered for homes and apartments where space is tight but performance cannot be compromised. Available in five capacities — 90L, 120L, 150L, 180L and 210L — its reduced slimline 475 mm diameter lets it fit into airing cupboards, plant rooms and loft spaces that defeat standard-sized cylinders. Built from Duplex LDX 2101 stainless steel and tested to BS EN 12897:2016, it delivers full mains-pressure hot water to single or multiple outlets with a market-leading 25-year cylinder warranty.
The cylinder vessel is fabricated from Duplex LDX 2101 stainless steel — a grade chosen for its excellent corrosion resistance and mechanical strength. It handles both soft and moderately hard UK water supplies, and carries the full 25-year manufacturer's warranty against faulty materials and manufacture.
At 475 mm diameter, this range is narrower than standard hot water cylinders. That reduction in footprint makes it the natural choice for conversions, loft rooms, narrow cupboards, and apartment risers where a full-width cylinder simply won't fit — without sacrificing capacity or pressure.
Each cylinder leaves the factory with a 3 kW Incoloy immersion heater already installed and tested at 230 V. Incoloy resists scale build-up better than copper elements and is Joule's standard choice for long service life. The heater is controlled by a dual-stat assembly with a high-limit thermal cut-out for safety.
Unlike vented cylinders that rely on a cold-water storage tank, unvented systems connect directly to the mains cold supply. This delivers fast-flowing, high-pressure hot water to every tap and shower simultaneously — no pump required, no gravity-fed trickle from the top-floor bathroom.
The cylinder is wrapped in dense, high-efficiency polyurethane foam insulation with an ODP of 0 and GWP of 1 — the most environmentally benign foam insulation class available. This translates to a measured heat loss of 1.68 kWh/24h (150 L model, per ErP data), keeping running costs low between heating cycles.
Every cylinder is supplied with a full G3 unvented kit: inlet control group (including pressure-reducing valve, non-return valve, expansion relief valve and line strainer), expansion vessel and hose, temperature & pressure relief valve, tundish, and dual cylinder thermostat with high-limit cut-out. No chasing separate components.
The cylinder is finished in a clean white outer casing — the same aesthetic language as modern white goods — with a grey polycarbonate T&P safety cover. It looks at home in utility rooms, en-suite cupboards, and any installation where appearance matters.
The factory-fitted immersion heater connects to standard UK time-switch and thermostat controls, and is also compatible with solar PV immersion diverters (such as myenergi eddi or similar). Owners with solar panels can divert surplus generation into the cylinder for free hot water — no extra hardware needed on the cylinder side.
| Parameter | 90 L | 120 L | 150 L | 180 L | 210 L |
|---|---|---|---|---|---|
| Capacity (L) | 90 | 120 | 150 | 180 | 210 |
| Diameter (mm) | 475 (all models) | ||||
| Height A (mm) | ~936 | ~1205 | 1360 | ~1469 | ~1712 |
| Immersion heater | 3 kW Incoloy @ 230 V (factory-fitted) | ||||
| Max mains working pressure | 10 bar | ||||
| Operating pressure (T&P) | 7 bar | ||||
| Safety temperature cut-out | 90 °C | ||||
| Heat loss (150 L) | 1.68 kWh/24 h (ErP) | ||||
| Cylinder material | Duplex LDX 2101 stainless steel | ||||
| Insulation | Dense PU foam, CFC/HCFC-free, ODP 0, GWP 1 | ||||
| Test standard | BS EN 12897:2016 | ||||
| Cylinder warranty | 25 years (controls/components: 2 years) | ||||
Who can install an unvented hot water cylinder?
What is the difference between a Direct and Indirect unvented cylinder?
What size cylinder do I need?
Can I connect a solar PV diverter or solar thermal to this cylinder?
How often does an unvented cylinder need servicing?
What water quality is required to maintain the Joule warranty?
Product Information
Product Information
Shipping & Returns
Shipping & Returns
Description
The Joule Cyclone Plus Direct Slim is a direct electric unvented hot water cylinder engineered for homes and apartments where space is tight but performance cannot be compromised. Available in five capacities — 90L, 120L, 150L, 180L and 210L — its reduced slimline 475 mm diameter lets it fit into airing cupboards, plant rooms and loft spaces that defeat standard-sized cylinders. Built from Duplex LDX 2101 stainless steel and tested to BS EN 12897:2016, it delivers full mains-pressure hot water to single or multiple outlets with a market-leading 25-year cylinder warranty.
The cylinder vessel is fabricated from Duplex LDX 2101 stainless steel — a grade chosen for its excellent corrosion resistance and mechanical strength. It handles both soft and moderately hard UK water supplies, and carries the full 25-year manufacturer's warranty against faulty materials and manufacture.
At 475 mm diameter, this range is narrower than standard hot water cylinders. That reduction in footprint makes it the natural choice for conversions, loft rooms, narrow cupboards, and apartment risers where a full-width cylinder simply won't fit — without sacrificing capacity or pressure.
Each cylinder leaves the factory with a 3 kW Incoloy immersion heater already installed and tested at 230 V. Incoloy resists scale build-up better than copper elements and is Joule's standard choice for long service life. The heater is controlled by a dual-stat assembly with a high-limit thermal cut-out for safety.
Unlike vented cylinders that rely on a cold-water storage tank, unvented systems connect directly to the mains cold supply. This delivers fast-flowing, high-pressure hot water to every tap and shower simultaneously — no pump required, no gravity-fed trickle from the top-floor bathroom.
The cylinder is wrapped in dense, high-efficiency polyurethane foam insulation with an ODP of 0 and GWP of 1 — the most environmentally benign foam insulation class available. This translates to a measured heat loss of 1.68 kWh/24h (150 L model, per ErP data), keeping running costs low between heating cycles.
Every cylinder is supplied with a full G3 unvented kit: inlet control group (including pressure-reducing valve, non-return valve, expansion relief valve and line strainer), expansion vessel and hose, temperature & pressure relief valve, tundish, and dual cylinder thermostat with high-limit cut-out. No chasing separate components.
The cylinder is finished in a clean white outer casing — the same aesthetic language as modern white goods — with a grey polycarbonate T&P safety cover. It looks at home in utility rooms, en-suite cupboards, and any installation where appearance matters.
The factory-fitted immersion heater connects to standard UK time-switch and thermostat controls, and is also compatible with solar PV immersion diverters (such as myenergi eddi or similar). Owners with solar panels can divert surplus generation into the cylinder for free hot water — no extra hardware needed on the cylinder side.
| Parameter | 90 L | 120 L | 150 L | 180 L | 210 L |
|---|---|---|---|---|---|
| Capacity (L) | 90 | 120 | 150 | 180 | 210 |
| Diameter (mm) | 475 (all models) | ||||
| Height A (mm) | ~936 | ~1205 | 1360 | ~1469 | ~1712 |
| Immersion heater | 3 kW Incoloy @ 230 V (factory-fitted) | ||||
| Max mains working pressure | 10 bar | ||||
| Operating pressure (T&P) | 7 bar | ||||
| Safety temperature cut-out | 90 °C | ||||
| Heat loss (150 L) | 1.68 kWh/24 h (ErP) | ||||
| Cylinder material | Duplex LDX 2101 stainless steel | ||||
| Insulation | Dense PU foam, CFC/HCFC-free, ODP 0, GWP 1 | ||||
| Test standard | BS EN 12897:2016 | ||||
| Cylinder warranty | 25 years (controls/components: 2 years) | ||||
