The Quality Heating QH Dual 80 Litre Electric Water Heater is a wall-mounted, vertical-only unvented hot water storage cylinder built for gas-free properties needing a reliable, high-volume supply. It combines a zirconium-enamel inner vessel, a 2,000W copper heating element, and 40mm foam insulation for efficient, long-lasting performance rated Energy Class B.
At 80 litres stored capacity and heated to 65°C, this unit delivers approximately 142 litres of usable blended hot water per cycle once mixed down to a comfortable 41°C delivery temperature - well suited to two-person households and single-occupant properties with above-average hot water demand. It mounts vertically on a load-bearing wall via a supplied bracket, and connects using a standard 13A plug or can be hardwired for a permanent installation.
Vertical Mounting Only
This model is engineered for vertical wall-mounting only - it must not be installed lying on its side. Confirm the wall can support four times the fully-filled weight of the unit before installation.
Usable Water Yield is a Calculated Figure
The 142L usable water figure assumes a stored temperature of 65°C, a 10°C cold mains feed, and blending down to a 41°C delivery temperature - the standard reference point used across the QH range. Actual usable volume will vary with incoming mains temperature and the delivery temperature selected on site.
Solar PV & Economy 7 Compatible
Pair with a solar diverter (such as a myenergi Eddi) to heat water using surplus solar generation, or use a time-switch to take advantage of off-peak Economy 7 tariffs.
💧 80-Litre Stored Capacity
Delivers approximately 142 litres of usable blended hot water per cycle once mixed to a comfortable 41°C - ideal for two occupants.
⚡ 2,000W Copper Element
Fast heat-up and long service life; copper resists scale build-up better than alternative element materials, particularly valuable in hard-water areas.
🛡️ Zirconium-Enamel Inner Vessel
Superior corrosion resistance against the pH and mineral variation found across UK mains water supplies.
🧭 40mm Foam Insulation
Polyurethane foam insulation (λ = 0.22 W/mK) delivers excellent standby heat retention and low heat losses between draws.
🔔 Anode Condition Alarm
Audible and visual alert when the magnesium sacrificial anode needs replacement, extending the working life of the vessel.
🔒 Six-Level Safety System
Overheat cut-out, thermostatic protection, anode monitoring, and a supplied pressure relief valve (PRV) cover every statutory safety requirement.
| Identification |
| EAN / SKU |
8720986321822 |
| Brand |
Quality Heating |
| Warranty |
2 years |
| Capacity & Output |
| Stored Capacity |
80 litres |
| Usable Hot Water Yield (calculated) |
Approx. 142 litres per cycle, blended to 41°C from 65°C store and 10°C cold main |
| Rated Power |
2,000W (adjustable 800W / 1,200W / 2,000W) |
| Electrical |
| Voltage |
230V / 50Hz |
| Cable Length |
1.5m |
| Electrical Connection |
13A plug (removable for hardwiring) |
| IP Rating |
IPX4 |
| Construction |
| Heating Element Material |
Copper |
| Inner Vessel Coating |
Zirconium-enamel |
| Anode Material |
Magnesium, with audible & visual condition alarm |
| Insulation Thickness |
40mm polyurethane foam |
| Thermal Conductivity (λ) |
0.22 W/mK |
| Energy Label |
Class B |
| Dimensions & Installation |
| Height |
950mm (95cm) |
| Width |
530mm (53cm) |
| Depth |
280mm (28cm) |
| Net Weight |
26kg |
| Mounting Orientation |
Vertical (wall-mounted only) |
| Connection Size |
15mm (inlet & outlet) |
| Safety & Compliance |
| Safety Features |
6-level protection; PRV (safety valve) included |
| Controls |
Digital display, adjustable thermostat, illuminated on/off switch |
| Certification |
CE marked |
Installation & Trade Notes:
This unit is designed for a vented (low-pressure) cold water supply. The supplied PRV must be fitted and plumbed to a safe, visible, frost-free discharge point in compliance with Water Regulations and Building Regulations Part G. This model is vertical installation only - it cannot be mounted horizontally.
All electrical work must be carried out by a Part P-registered electrician. Connect via a 13A fused spur or remove the plug for hardwired connection. The circuit must be protected by an RCD. Water connections are 15mm (inlet & outlet). Flush the cylinder before commissioning and set the thermostat to a minimum of 60°C in accordance with HTM 04-01 Legionella prevention guidance.
How much usable hot water does the 80-litre cylinder provide?
Using the standard reference of a 65°C store, 10°C cold main, and 41°C delivery temperature, the cylinder yields approximately 142 litres of usable hot water per cycle - enough for two occupants with normal daily use.
Can this unit be mounted horizontally?
No. This model is designed for vertical wall-mounting only. A separate QH Dual 80L Horizontal model is available for restricted-height installations.
Is the pressure relief valve included?
Yes - a PRV is supplied as standard and must be fitted and plumbed to a safe discharge point. This is a legal requirement under the Water Regulations.
Can it be hardwired?
Yes. Remove the 13A plug and connect the supply cable directly to a fused connection unit. All electrical work must be carried out by a competent person under Building Regulations Part P.
What does the anode alarm do?
The magnesium anode protects the inner vessel from corrosion. When it's depleted, the unit triggers a visual and audible alarm, prompting timely replacement and extending cylinder life.
Is it compatible with Economy 7 or solar PV?
Yes to both. Use a time-switch for off-peak Economy 7 overnight heating, or pair with a solar diverter such as the myenergi Eddi to use surplus solar energy for free hot water.
