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Unvented Water Heaters

Unvented Water Heaters

Unvented water heating is the fastest growing sector of the UK market. Shop4 Electrical recognises this with the huge range of products offered from market leading suppliers Heatrae Sadia, Zip Water Heaters, Redring, Santon and Hyco Manufacturing covering all sizes of domestic and commercial installations.



Unvented water heaters are cost effect...

Unvented water heating is the fastest growing sector of the UK market. Shop4 Electrical recognises this with the huge range of products offered from market leading suppliers Heatrae Sadia, Zip Water Heaters, Redring, Santon and Hyco Manufacturing covering all sizes of domestic and commercial installations.



Unvented water heaters are cost effective due to the flexibility of installation. The water heater produces mains pressure hot water and a balanced supply of output to each outlet it supplies. This therefore means they can be used to power multi-basin installations, such as kitchens & washrooms, effectively. There is also no need for a separate cold water cistern which results in a more flexible installation process. Unvented Water Heaters are available as Under Sink Water Heaters and Over Sink Water Heaters, which literally means they can be positioned over the sink or indeed under sink depending on your hot water requirements.



Unvented systems are fed directly from the cold water mains supply and offer a number of benefits compared to conventional systems:
• Higher pressure and flow rates at all hot taps
• Balanced hot and cold water supplies
• No requirement for an expansion tank
• No special taps required



Large capacity Commercial Unvented Water Heaters are available up to a 100 litre capacity for heavy duty commercial installations for applications such as dishwashing, hand washing or low demand canteen use.

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  • Ariston Andris LUX Unvented Water Heaters
    The Andris Lux from Ariston is a market leading small unvented electric water heater.The Andris Lux encompasses Italian design, energy efficiency, durability, usability and safety, and is available in various models including 10, 15 & 30 litre variants as well as oversink...

    The Andris Lux from Ariston is a market leading small unvented electric water heater.

    The Andris Lux encompasses Italian design, energy efficiency, durability, usability and safety, and is available in various models including 10, 15 & 30 litre variants as well as oversink and undersink versions.

    The Andris Lux is the perfect solution to give users small amounts of hot water in locations such as loft conversions, garages, workshops, kitchens etc.

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  • Ariston Andris LUX Eco Unvented Water Heaters
    The Andris Lux Eco from Ariston is a small unvented electric water heater, encompassing leading Italian design, energy efficiency, durability, usability and safety. This premium model also boasts new features, including anti-legionella and anti-overheating functions....

    The Andris Lux Eco from Ariston is a small unvented electric water heater, encompassing leading Italian design, energy efficiency, durability, usability and safety. This premium model also boasts new features, including anti-legionella and anti-overheating functions.  

    Available in 10, 15 and 30-litre models, each with the option of 2.5kW elements, Andris Lux Eco is perfect for a variety of specification-led locations, including commercial properties, building sites, kitchens, bathrooms or offices.

    From an energy efficiency perspective, the hot water heaters feature Ariston’s ‘ECO EVO’ function – a new electronic control with automatic learning software, which enables users to achieve energy savings of up to 15%. Andris Lux Eco units also have an ErP ‘A’ rating across the range.

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  • Zip Aquapoint III Eco Multiple Outlet Water Heaters
    The Zip Aquapoint III Eco range of direct unvented water heaters are designed to utilise a mains water supply and provide hot water to multiple outlets. The units are to be wall-mounted. All heaters are supplied with a fitting kit as standard.

    The Zip Aquapoint III Eco range of direct unvented water heaters are designed to utilise a mains water supply and provide hot water to multiple outlets. The units are to be wall-mounted. All heaters are supplied with a fitting kit as standard.

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  • Zip Aquapoint III Water Heaters
    Zip Aquapoint III is a range of unvented Water Heater supplied in a range of different sizes to serve single or multiple outlets. Supplied with all the necessary accessories for installation they are suitable for supplying hot water within domestic or commercial environments.

    Zip Aquapoint III is a range of unvented Water Heater supplied in a range of different sizes to serve single or multiple outlets. Supplied with all the necessary accessories for installation they are suitable for supplying hot water within domestic or commercial environments.

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  • Zip Varipoint II Water Heaters
    The Varipoint II unvented water heater can provide hot water, at mains pressure, for one or more outlets and can be used with conventional taps. The range offers both undersink and oversink variations in a range of capacity sizes.

    The Varipoint II unvented water heater can provide hot water, at mains pressure, for one or more outlets and can be used with conventional taps. The range offers both undersink and oversink variations in a range of capacity sizes.

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  • Zip Varipoint III Water Heaters
    The Zip Varipoint lll range offers a choice of medium capacity unvented water heaters that deliver hot water for multiple outlets in commercial applications. Supplied with factory fitted P&T valve and full installation fitting kit

    The Zip Varipoint lll range offers a choice of medium capacity unvented water heaters that deliver hot water for multiple outlets in commercial applications. Supplied with factory fitted P&T valve and full installation fitting kit

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  • Heatrae Sadia Hotflo Water Heaters
    Hotflo can service up to three basins and has a copper inner container, requiring no anode, to achieve optimum performance in terms of durability and corrosion-resistance. A temperature and pressure relief valve or thermostatic blending valves (if required), must be ordered...

    Hotflo can service up to three basins and has a copper inner container, requiring no anode, to achieve optimum performance in terms of durability and corrosion-resistance. A temperature and pressure relief valve or thermostatic blending valves (if required), must be ordered separately.

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  • Heatrae Sadia Multipoint SS Water Heaters
    Available in both horizontal and vertical models, and with a choice of three capacities, the Multipoint SS range suits a variety of applications. The slim design allows unobtrusive wall mounting or concealment within ceiling voices or risers.

    Available in both horizontal and vertical models, and with a choice of three capacities, the Multipoint SS range suits a variety of applications. The slim design allows unobtrusive wall mounting or concealment within ceiling voices or risers.

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  • Heatrae Sadia Multipoint 10/15 Water Heaters
    Multipoint is the market-leading range of small unvented water heaters. This range is quick and easy to install with a choice of element ratings. It is supplied with a factory-fitted temperature and pressure relief valve.

    Multipoint is the market-leading range of small unvented water heaters. This range is quick and easy to install with a choice of element ratings. It is supplied with a factory-fitted temperature and pressure relief valve.

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  • Heatrae Sadia Multipoint 30/50 Water Heaters
    These medium sized Multipoint models are ideal for use in cloakrooms, kitchens or wash rooms where a single heater is required to service up to 7 low usage basins, 5 high usage basins or up to 2 commercial sinks. The 50 litre model may also be used for single point showering.

    These medium sized Multipoint models are ideal for use in cloakrooms, kitchens or wash rooms where a single heater is required to service up to 7 low usage basins, 5 high usage basins or up to 2 commercial sinks. The 50 litre model may also be used for single point showering.

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  • Heatrae Sadia Multipoint 75/100 Water Heaters
    Multipoint 75 / 100 have twin inner containers for a compact profile which makes it an ideal replacement for traditional vented cistern-type flat-back water heaters. Supplied factory assembled with safety valves and integral expansion vessel to reduce on-site installation time.

    Multipoint 75 / 100 have twin inner containers for a compact profile which makes it an ideal replacement for traditional vented cistern-type flat-back water heaters. Supplied factory assembled with safety valves and integral expansion vessel to reduce on-site installation time.

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  • Redring EW Water Heaters
    Redring EW Range has been designed to provide stored hot water from a mains pressurised water supply, where there's no requirement for a temperature/pressure relief device, making installation simple.

    Redring EW Range has been designed to provide stored hot water from a mains pressurised water supply, where there's no requirement for a temperature/pressure relief device, making installation simple.

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  • Redring MW Water Heaters
    Redring MW range of oversink and undersink unvented storage water heaters have been designed to provide stored hot water from a mains pressurised water supply. The range is supplied complete with a factory fitted temperature and pressure relief device.

    Redring MW range of oversink and undersink unvented storage water heaters have been designed to provide stored hot water from a mains pressurised water supply. The range is supplied complete with a factory fitted temperature and pressure relief device.

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  • Redring TS Unvented Water Heaters
    The TS range has been designed to provide stored hot water from a mains pressurised water supply. The TS unvented water storage heater comes complete with a pressure relief device for inline installation.

    The TS range has been designed to provide stored hot water from a mains pressurised water supply. The TS unvented water storage heater comes complete with a pressure relief device for inline installation.

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  • Redring MS6 Unvented Water Heater
    A compact under sink unvented storage water heater ideal for a single wash basin in bathrooms, kitchens and utility rooms.

    A compact under sink unvented storage water heater ideal for a single wash basin in bathrooms, kitchens and utility rooms.

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  • Santon Aqualine Unvented Water Heaters
    Aqualine is the ultimate in electric unvented water heating. All operational and safety controls are contained within the case. This includes a TMV2 thermostatic blending valve which allows the unit to store water at a high temperature and dispense at handwash temperature.

    Aqualine is the ultimate in electric unvented water heating. All operational and safety controls are contained within the case. This includes a TMV2 thermostatic blending valve which allows the unit to store water at a high temperature and dispense at handwash temperature.

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  • Santon Aquaheat Unvented Water Heaters
    Aquaheat is a range of small unvented water heaters available in capacities of 7, 10 and 15 litres. Featuring copper inner containers, Aquaheat provides a cost effective solution for a variety of commercial applications.

    Aquaheat is a range of small unvented water heaters available in capacities of 7, 10 and 15 litres. Featuring copper inner containers, Aquaheat provides a cost effective solution for a variety of commercial applications.

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  • Santon Aquaheat SS Unvented Water Heaters
    The range of Aquaheat SS unvented horizontal and vertical water heaters are available in 50 – 100 litre capacities. With factory-fitted temperature and pressure relief valve.

    The range of Aquaheat SS unvented horizontal and vertical water heaters are available in 50 – 100 litre capacities. With factory-fitted temperature and pressure relief valve.

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  • Hyco Speedflow Unvented Water Heaters
    Speedflow unvented water heaters - One unit located under the kitchen sink is often used to supply hot water for light dishwashing in the kitchen sink and handwashing in the cloakroom basin.

    Speedflow unvented water heaters - One unit located under the kitchen sink is often used to supply hot water for light dishwashing in the kitchen sink and handwashing in the cloakroom basin.

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  • Hyco Powerflow Unvented Water Heaters
    Powerflow unvented water heaters - The ideal solution for light industrial, commercial and light domestic hot water requirements. Can be used with regular taps, including mixers.

    Powerflow unvented water heaters - The ideal solution for light industrial, commercial and light domestic hot water requirements. Can be used with regular taps, including mixers.

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