Joule - Stainless Steel Unvented Cylinder - 120L Stelflow Indirect Slimline
Shipping time: 2–7 days
Please call us for precise delivery dates.
Get Free Delivery on Orders Over £60
For more details, please refer to our Shipping Information.
Description
The Joule 120L Stelflow Stainless Steel Unvented Cylinder (Indirect Slimline) is a compact hot-water storage cylinder designed for indirect unvented systems. Built for properties with limited plant-room space, it delivers reliable hot water from a primary heat source (boiler or heat pump) while offering efficient heat transfer and low standby losses. Durable stainless-steel coil construction, dense PU foam insulation and a slim profile make it a long-lasting, energy-conscious choice for domestic and light‑commercial installations.
Key Features
- Capacity: 120 litres actual usable hot water.
- Slimline design: space-saving profile for cupboards and tight plant rooms.
- Single 316L stainless‑steel coil: durable, corrosion‑resistant heat exchanger for efficient indirect heating.
- Coil performance: 15.63 kW rating with 0.66 m² surface area for quick heat transfer.
- Cylinder material: LDX 2101 for structural strength and corrosion protection.
- Outer casing: coated mild steel for a neat, robust finish.
- Thermal insulation: dense PU foam to reduce standby heat loss (1.24 kWh/24h).
- Immersion heater: single 3 kW @ 230 V immersion for auxiliary electric boost.
- Pressure & temperature ratings: max mains pressure 10 bar; operating pressure 7 bar; operating temperature 60°C; safety valve temp 90°C.
- Standards & warranty: tested to BS EN 12897:2016 and backed by a 25‑year warranty.
- Manageable weight: 30 kg empty; 150 kg when full.
Ideal Use Cases
- Homes and apartments needing reliable hot water where space is limited.
- New-builds or renovations replacing bulkier cylinders with a slim unit.
- Indirect unvented systems using boilers or heat pumps as the primary heat source.
- Light‑commercial properties requiring compact, dependable hot‑water storage.
- Installations prioritising corrosion resistance and long-term durability.
Product Specifications
| Specification | Value |
|---|---|
| Model | Joule 120L Stelflow (Indirect Slimline) |
| Actual capacity (L) | 120 |
| Unit weight empty (kg) | 30 |
| Unit weight full (kg) | 150 |
| Number of immersions | 1 |
| Immersion spec (kW @ 230 V) | 3 kW @ 230 V |
| Thermal insulation | Dense PU foam |
| Foam thickness (mm) | 0 |
| Cylinder material | LDX 2101 |
| Outer casing | Coated mild steel |
| Coil material | 316L stainless steel |
| Number of heat exchangers | 1 |
| Coil 1 rating (kW) | 15.63 |
| Coil 1 surface area (m²) | 0.66 |
| Coil 1 max primary pressure (Bar) | 3.5 |
| Coil 1 resistance (Bar) | 0.2 |
| Max mains water pressure (Bar) | 10 |
| Operating pressure (Bar) | 7 |
| Operating temperature (°C) | 60 |
| Safety valve temperature (°C) | 90 |
| Heat loss (kWh/24h) | 1.24 |
| Tested to standard | BS EN 12897:2016 |
| Warranty terms (Years) | 25 Y |
Shipping Information
At GetPlumb, we strive to provide reliable and cost-effective delivery options to our customers. Please review our shipping policy below.
🆓 Free Local Delivery (Orders £60 & above)
We offer FREE delivery on orders £60 or more for selected local areas.
Eligible Postcodes Include:
- RG*
- SL*
- OX10*, OX11*, OX49*
- HP1*, HP3*, HP8*, HP9*, HP10*, HP11*, HP12*, HP13*, HP14*
- WD*, HA*, UB*, TW*, KT*
- W1* – W9*
- NW*, SW*
Delivery Time: 2–4 working days
Shipping Cost: £0.00
📦 Standard Shipping (Weight-Based Rates)
For orders that do not qualify for free delivery, standard shipping rates apply based on total cart weight.
- For cart weight between 0–5 kg, the shipping cost is £2.99 with a delivery time of 2–4 working days.
- For cart weight between 5–25 kg, the shipping cost is £7.99 with a delivery time of 2–4 working days.
- For cart weight between 26–40 kg, the shipping cost is £15.98 with a delivery time of 2–4 working days.
- For cart weight of 41 kg and above, the shipping cost is £31.96 with a delivery time of 2–4 working days.
🧱 Block Salt (Harvey’s) – Unit-Based
Shipping
This rate applies only to Harvey’s block salt products.
- £7.99 is charged for every 3 items.
- The charge increases by £7.99 for each additional set of 3 items.
Examples:
- 1–3 items → £7.99
- 4–6 items → £15.98
- 7–9 items → £23.97
Delivery Time: 2–4 working days
📏 Large / Long Items (Length-Based Shipping)
For oversized items where the product length is 1.5 metres or more:
Conditions:
- Product length ≥ 1.5 m
- Cart weight ≤ 40 kg
Shipping Cost: £18.00 (flat rate)
Delivery Time: 2–4 working days
Collection from Store
Customers can also choose to collect their order from our store in
Reading, UK, at no additional charge.
For any questions regarding shipping, please contact our support team at online@getplumb.co.uk.
