The Quality Heating QH Dual 50 Litre Electric Water Heater is a compact, wall-mounted hot water storage unit built for properties without a mains gas supply. Part of the premium Extra Life series, it combines a zirconium-enamel lined vessel, a copper heating element, and a generous 40 mm foam insulation jacket — delivering efficient, reliable hot water with minimal heat loss and outstanding longevity.
With three selectable power settings (800W, 1,200W, or 2,000W), a digital display, and a fully adjustable thermostat, this unit gives homeowners and tradespeople complete control over running costs and water temperature. Rated Energy Class B, it's an ideal choice for all-electric new builds, retrofit projects, flats, studios, and any location where a dependable, gas-free hot water solution is needed.
Why Buy the QH Dual 50L Electric Water Heater?
⚡ Selectable Power Settings Run at 800W, 1,200W, or 2,000W — match heating speed to your energy budget or solar output.
🛡️ Zirconium-Enamel Inner Vessel Superior corrosion resistance over standard vitreous enamel — especially valuable in hard-water areas.
🔥 Copper Heating Element Proven durability and efficient heat transfer; less prone to scale build-up than alternative materials.
🧊 40mm Foam Insulation Excellent standby heat retention (λ = 0.22 W/mK) — lower heat losses between draws.
🔔 Anode Condition Alarm Visual and audible alert tells you when the magnesium anode needs replacing — no guesswork.
🌞 Solar PV Compatible Pair with a solar diverter (e.g. myenergi Eddi) to use excess generation for free hot water.
🔒 Six-Level Safety System Includes overheat cut-out, PRV (supplied), thermostatic protection, and anode health monitoring.
📏 Compact Footprint 450 mm wide × 240 mm deep × 870 mm high — fits airing cupboards and tight plant spaces.
✅ CE Marked & 2-Year Warranty Manufactured to EU safety standards; two-year manufacturer warranty included.
Suitable For
All-electric & gas-free homes New-build flats & apartments Retrofit & renovation projects Studios & bedsits Holiday lets & serviced apartments Hair salons & barbers Garages & workshops Stables & outbuildings Garden offices & annexes Solar PV diversion installations Lodges & glamping sites Off-grid & rural properties
Product Description
The QH Dual 50L has a gross capacity of 50 litres. When heated to 60–65°C (as recommended for Legionella control) and blended down to a usable 37°C, the cylinder delivers approximately 139 litres of usable hot water per cycle — more than sufficient for one to two occupants covering both bathroom and kitchen use.
The unit mounts vertically to a load-bearing wall using the supplied bracket. The 1.5-metre mains lead can be used with a fused connection unit, or the plug removed for direct hardwired connection to a 13A fused circuit — giving installers flexibility on the electrical termination. The included pressure relief valve (PRV) must be plumbed to a safe discharge point as part of the installation.
The digital display and illuminated on/off switch make operation straightforward for end users. Temperature is fully adjustable via the built-in thermostat, and the six-level safety system ensures the unit always operates within safe parameters. The anode condition indicator provides a visual and audible alarm, prompting timely servicing and helping to extend vessel life well beyond standard cylinders.
The inner vessel's zirconium-enamel coating offers superior resistance to the pH variations found in UK mains water — particularly important in hard-water regions such as the South East, Midlands, and East Anglia. Combined with the magnesium sacrificial anode, this gives the cylinder robust corrosion protection across its full service life.
Key Features
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50-litre capacity — approx. 139 litres of usable blended hot water per cycle at 37°C
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Adjustable power: 800W / 1,200W / 2,000W — ideal for off-peak, Economy 7, or solar diversion
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Zirconium-enamel inner vessel — corrosion-resistant, long service life
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Copper heating element — efficient, durable, and scale-resistant
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40 mm polyurethane foam insulation (λ = 0.22 W/mK) — minimal standby heat loss
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Magnesium sacrificial anode with audible/visual condition alarm
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Digital display with adjustable thermostat and illuminated on/off switch
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Six-level safety system — PRV (safety valve) supplied as standard
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Energy Class B — low running costs
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Vertical wall-mount — compact 450 × 240 × 870 mm
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230V / 50Hz — 1.5 m lead with 13A plug (plug removable for hard-wiring)
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CE marked — manufactured to EU safety standards
- 2-year manufacturer warranty
Technical Specifications
| Specification |
Detail |
| EAN / Barcode |
8720986321815 |
| Capacity |
50 litres |
| Rated Power |
2,000W |
| Selectable Power Settings |
800W / 1,200W / 2,000W |
| Voltage |
230V / 50Hz |
| Energy Label |
Class B |
| Heating Element Material |
Copper |
| Inner Vessel Coating |
Zirconium-enamel |
| Anode Material |
Magnesium (with condition alarm) |
| Insulation Thickness |
40 mm polyurethane foam |
| Thermal Conductivity (λ) |
0.22 W/mK |
| Height |
870 mm (87 cm) |
| Width |
450 mm (45 cm) |
| Depth |
240 mm (24 cm) |
| Net Weight |
23 kg |
| Usable Hot Water Yield (blended at 37°C) |
Approx. 139 litres per cycle |
| Mounting Orientation |
Vertical (wall-mounted) |
| Cable Length |
1.5 m |
| Electrical Connection |
13A plug (removable for hardwiring) |
| Safety Features |
6-level protection; PRV (safety valve) included |
| Controls |
Digital display, adjustable thermostat, illuminated on/off switch |
| Certification |
CE marked |
| Warranty |
2 years |
Installation & Trade Notes
This unit is designed for use with a vented (low-pressure) cold water supply. The included pressure relief valve (PRV) must be fitted and plumbed to a safe, visible, frost-free termination point in compliance with the Water Regulations and Building Regulations Part G. Do not connect to a sealed (pressurised) system without appropriate pressure-limiting provisions.
Electrical work should be carried out by a Part P-registered electrician or competent person as defined under UK Building Regulations. The unit can be connected via a 13A fused spur, or the plug removed for permanent hardwired connection. The supply circuit must be protected by an appropriately rated RCD.
Water connections are made via ¾" BSP threads — standard UK plumbing. A Pentec UBIC or equivalent inlet combination valve is recommended and available separately. Always flush the vessel before commissioning and set the thermostat to a minimum of 60°C to comply with HTM 04-01 guidance on Legionella prevention.
Frequently Asked Questions
How much usable hot water does a 50-litre cylinder actually provide?
When heated to 65°C and blended to a comfortable 37°C shower temperature, the cylinder yields roughly 139 litres of usable hot water — ample for one to two people covering morning showers and kitchen use.
Can I connect it to my solar PV system?
Yes. Pair it with a solar diverter such as the myenergi Eddi, Immersun, or similar to direct surplus solar generation into the cylinder for free hot water. The selectable 800W / 1,200W power settings help match demand to available solar output at any time of day.
Is the pressure relief valve (PRV) included?
Yes — a PRV (safety valve) is supplied as standard and must be fitted and plumbed to a safe discharge point as part of the installation. This is a legal requirement under the Water Regulations.
Can it be hardwired rather than plug-in?
Yes. The 1.5 m supply cable comes fitted with a 13A plug for flexibility, but the plug can be removed so the cable connects directly to a fused connection unit or consumer unit. All electrical work must be carried out by a competent person and notified under Building Regulations Part P where required.
What does the anode condition alarm do?
The magnesium sacrificial anode protects the inner vessel from corrosion. When it becomes depleted, the unit triggers a visual and audible alert. Replacing the anode promptly extends the working life of the cylinder significantly — a key advantage of the Extra Life series design.
Is this unit suitable for Economy 7 or off-peak tariffs?
Absolutely. Set the unit to heat overnight using the adjustable thermostat and a time-switch or smart plug, taking full advantage of cheaper overnight electricity rates. The 800W setting is particularly economical for slow overnight heating.
What's in the Box
- QH Dual 50 Litre Electric Water Heater
- Wall-mounting bracket and fixings
- Pressure relief valve (PRV / safety valve)
- 1.5 m mains cable with 13A plug
- Multilingual installation and user manual (English included)
⚠️ Please Note: Connection kit (inlet combination valve), pipe fittings, and electrical accessories are not included and must be sourced separately. Installation must be carried out by a suitably qualified plumber and/or electrician in accordance with current UK Building Regulations, Water Regulations, and any other applicable standards. The pressure relief valve supplied must be plumbed to a safe discharge point as part of the installation.
