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80 Litre QH Performance WiFi Dual Electric Storage Water Heater - Energy Class A Stainless steel tank
Regular price
£430.00
Inc. VAT
£358.33
Exc. VAT
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The Quality Heating QH Performance WiFi Dual 80 Litre Electric Water Heater is a premium, wall-mounted hot water storage cylinder combining smart WiFi programming with an 80-litre stored capacity - built for households requiring a reliable, gas-free hot water supply. Rated Energy Class A, it offers intelligent scheduling, superior insulation, and flexible horizontal or vertical installation.
The built-in Smart Key function learns your household's hot water usage patterns over the first week and automatically adjusts heating schedules to match your routine, reducing standby energy use without compromising comfort. At 80 litres stored capacity, the cylinder delivers approximately 142 litres of usable blended hot water per cycle once mixed down to a comfortable 41°C delivery temperature.
80L
Stored Capacity
142L
Usable Hot Water
1,800W
Element Power
Class A
Energy Rating
WiFi
Smart Control
2 yrs
Warranty
Horizontal Installation: Outlet Must Face Upward
This model supports both vertical and horizontal wall mounting. When installed horizontally, the hot water outlet must be positioned at the top of the unit - essential for correct water stratification and to prevent air locks.
This model supports both vertical and horizontal wall mounting. When installed horizontally, the hot water outlet must be positioned at the top of the unit - essential for correct water stratification and to prevent air locks.
Usable Water Yield is a Calculated Figure
The 142L figure is a theoretical maximum, based on a stored temperature of 65°C, a 10°C cold mains feed, and blending down to a 41°C delivery temperature - the same reference point used across the QH range for comparability. This assumes vertical installation, where stratification is most effective. If installed horizontally, expect usable volume to run lower, since horizontal cylinders mix hot and cold water more readily than vertical ones.
The 142L figure is a theoretical maximum, based on a stored temperature of 65°C, a 10°C cold mains feed, and blending down to a 41°C delivery temperature - the same reference point used across the QH range for comparability. This assumes vertical installation, where stratification is most effective. If installed horizontally, expect usable volume to run lower, since horizontal cylinders mix hot and cold water more readily than vertical ones.
Delivered Flow Rate Depends on Your Mains Supply, Not the Cylinder
This is an unvented storage cylinder, not a rated instant/flow water heater, so the manufacturer's does not publish a fixed litres-per-minute output. The actual flow at the tap is governed by your incoming mains pressure and the 15mm pipework, not by the tank itself. What the manufacturer does specify: the factory-set safety valve operates at 0.8MPa (8 bar), and if your incoming mains pressure exceeds this, a pressure-reducing valve must be fitted on the inlet pipe. All connected pipework must be rated to withstand 0.8MPa and 100°C+. Internally, the cylinder's own pressure relief point is set to 0.1MPa, protecting the tank itself from over-pressurisation during heating.
This is an unvented storage cylinder, not a rated instant/flow water heater, so the manufacturer's does not publish a fixed litres-per-minute output. The actual flow at the tap is governed by your incoming mains pressure and the 15mm pipework, not by the tank itself. What the manufacturer does specify: the factory-set safety valve operates at 0.8MPa (8 bar), and if your incoming mains pressure exceeds this, a pressure-reducing valve must be fitted on the inlet pipe. All connected pipework must be rated to withstand 0.8MPa and 100°C+. Internally, the cylinder's own pressure relief point is set to 0.1MPa, protecting the tank itself from over-pressurisation during heating.
Activate Smart Key After One Week of Normal Use
We recommend activating Smart Key once the unit has been in normal daily use for a full week, so the learning algorithm has enough data to optimise your heating schedule accurately.
We recommend activating Smart Key once the unit has been in normal daily use for a full week, so the learning algorithm has enough data to optimise your heating schedule accurately.
📡 WiFi Smart Control
Set schedules, adjust temperature, and monitor from anywhere via the QH smartphone app (Tuya-based).
🧠 Smart Key Learning Function
Analyses your usage over 7 days and auto-programmes heating to your routine, saving energy automatically.
⭐ Energy Class A
Top energy rating - lower running costs compared to Class B or C cylinders.
💧 80-Litre Stored Capacity
Delivers approximately 142 litres of usable blended hot water per cycle once mixed to 41°C - ideal for 2-3 occupants.
🔄 Horizontal or Vertical Mounting
Fits where other cylinders won't - airing cupboards, plant rooms, utility spaces, or on their side in low-ceiling locations.
🔒 Six-Level Safety System
Overheat protection, PRV (supplied, factory set to 0.8MPa), thermostatic control, and anode health monitoring as standard.
Identification
EAN / SKU
8720986327404
Brand
Quality Heating
Warranty
2 years
Capacity, Output & Pressure
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
1,800W
Safety Valve (PRV) Setting
Factory set to 0.8MPa (8 bar)
Max. Recommended Inlet Pressure
0.8MPa - a pressure-reducing valve is required above this
Internal Tank Pressure Relief
0.1MPa
Connected Pipework Rating Required
Must withstand 0.8MPa and 100°C+
Flow Rate
Not a fixed manufacturer spec - determined by incoming mains pressure and 15mm pipework (see callout above)
Smart Features
Smart / WiFi
Yes - WiFi programmable with Smart Key learning function (Tuya app)
Electrical
Voltage
230V / 50Hz
Cable Length
1.5m
Electrical Connection
13A plug (removable for hardwiring)
Construction
Heating Element Material
Copper
Inner Vessel Material
SPCC steel with enamel coating
Anode Material
Magnesium, with audible & visual condition alarm
Insulation Thickness
40mm polyurethane foam
Thermal Conductivity (λ)
0.22 W/mK
Energy Label
Class A
Dimensions & Installation
Height
1,010mm (101cm)
Width
560mm (56cm)
Depth
300mm (30cm)
Net Weight
26kg
Mounting Orientation
Vertical or horizontal (hot outlet must face upward when horizontal)
Connection Size
15mm (inlet & outlet)
Safety & Compliance
Safety Features
6-level protection; PRV (safety valve) included, factory set to 0.8MPa
Controls
Digital display, adjustable thermostat, illuminated on/off switch, Smart Key button
Certification
CE marked
Installation & Trade Notes:
This unit is designed for a 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. If incoming mains pressure exceeds 0.8MPa, a pressure-reducing valve must be installed on the inlet pipe ahead of the cylinder.
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. When mounting horizontally, the hot water outlet connection must face upward - failure to observe this will cause stratification problems and air locks. Water connections are 15mm (inlet & outlet), and all connected pipework and fittings must be rated to withstand at least 0.8MPa and 100°C. Flush the cylinder before commissioning and set the thermostat to a minimum of 60°C in line with HTM 04-01 Legionella 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, well suited for two to three occupants with normal daily use.
What flow rate can I expect from this water heater?
As an unvented storage cylinder rather than an instant/flow heater, the manufacturer does not publish a fixed litres-per-minute rating - flow at the tap depends on your incoming mains pressure and the 15mm connection pipework, not the cylinder. The safety valve is factory set to 0.8MPa (8 bar); if your mains pressure is higher than this, fit a pressure-reducing valve on the inlet.
How does the Smart Key function work?
Hold the Smart Key button (top-right of the display) for three seconds to activate it. The cylinder then monitors your hot water draw times and volumes over the following seven days, and from day eight automatically sets heating schedules to pre-heat water just ahead of your normal usage times.
Can it be installed horizontally?
Yes - this model supports both vertical and horizontal wall mounting. When installed horizontally, the hot water outlet must be positioned at the top of the unit, essential for correct water stratification and to prevent air locks.
Is the pressure relief valve (PRV) included, and what pressure is it set to?
Yes - a PRV is supplied as standard, factory set to 0.8MPa (8 bar), 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. If your mains supply exceeds 0.8MPa, a separate pressure-reducing valve must be fitted on the inlet pipe.
Can it be hardwired rather than plug-in?
Yes. The 1.5m supply cable has a 13A plug which can be removed to allow direct hardwired connection. All electrical work must be carried out by a competent person under Building Regulations Part P.
Is it suitable for Economy 7 or off-peak tariffs?
Yes. Use the WiFi app or Smart Key scheduling to programme overnight heating during off-peak hours, taking full advantage of cheaper Economy 7 or time-of-use tariff rates.
BTU & WATT Calculator
Room Dimensions
Room Type
Living Room
Bedroom
Kitchen
Bathroom
Conservatory
Hallway
Glazing Type
Single Glazed
Double Glazed
Triple Glazed
External Walls
0 Wall
1 Wall
2 Walls
3 Walls
4 Walls
Insulation Level
Poor
Average
Good (New Build)
Required Heating
0
Watts
0
BTUs
Documentation
Downloads
Tools & Kits
Build your kit
Need a full system?
Design your complete solution in minutes with our kit builders.
Do you have a question
about this product?
One of our expert advisors will be happy to help you!
Contact Us