Joule - Stainless Steel Unvented Cylinder - 90L Stelflow Direct 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 Stainless Steel Unvented Cylinder — 90L Stelflow Direct Slimline is a compact, direct electric hot water cylinder engineered for pressurised domestic systems where space is limited. Delivering reliable hot water on demand via a single immersion, it’s ideal for small homes, flats or en‑suite installations that require consistent high‑pressure flow. Built from corrosion‑resistant materials with dense insulation and a 25‑year warranty, it offers low standby loss and long service life.
Key Features
- 85 L nominal storage capacity (practical 90L class) for small‑scale hot water needs.
- Direct unvented design with a single 3 kW immersion for fast electric heating.
- Slimline profile to fit tight plant rooms, cupboards or loft spaces.
- Cylinder manufactured from LDX 2101 for corrosion resistance and durability.
- Coated mild steel outer casing for a neat, protective finish.
- Dense PU foam insulation (50 mm) to minimise standby heat loss (1.03 kWh/24h).
- Single 3 kW @ 230 V immersion specification; direct dual‑stat configuration.
- High pressure capability (max mains pressure 10 Bar; operating pressure 7 Bar).
- Safety temperature set at 90 °C; tested to BS EN 50440:2015.
- Lightweight empty unit (21 kg) for easier handling and installation.
- 25‑year warranty.
Ideal Use Cases
- Small family homes, flats or studio apartments needing a compact, pressurised hot water source.
- En‑suite bathrooms, cloakrooms or single‑bathroom properties with limited plant space.
- Properties without a central boiler where electric heating is preferred or required.
- Renovation and retrofit projects replacing older, bulkier cylinders with a slimline unit.
- Installations requiring quick recovery from a single immersion for intermittent high demand.
- Small commercial or holiday‑let units where compact footprint and reliability matter.
Product Specifications Table
| Specification | Value |
|---|---|
| Model | Joule — Stelflow Direct Slimline (90L class) |
| Actual capacity (Ltr) | 85 |
| Unit weight empty (kg) | 21 |
| Unit weight full (kg) | 106 |
| No. immersions | 1 |
| Immersion spec (kW @ 230 V) | 3 kW @ 230 V |
| Dual stat label | Direct |
| Max mains water pressure (Bar) | 10 |
| Operating pressure (Bar) | 7 |
| Tested to standard | BS EN 50440:2015 |
| Heat loss (kWh/24h) | 1.03 |
| Thermal insulation | Dense PU foam |
| Foam thickness (mm) | 50 |
| Cylinder material | LDX 2101 |
| Outer casing | Coated mild steel |
| Operating temperature (°C) | — |
| Safety temperature (°C) | 90 |
| Warranty terms (Years) | 25Y |
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.
