Instantaneous Water Heaters

Instantaneous Water Heaters

Instantaneous water heaters, offer an innovative solution, by delivering heated water immediately from point of use. These small electrically powered inline water heaters heat water 'instantly' as it flows through the product. Their compact design helps to optimise space in any room size as it eliminates the need for centrally stored hot water c...

Instantaneous water heaters, offer an innovative solution, by delivering heated water immediately from point of use. These small electrically powered inline water heaters heat water 'instantly' as it flows through the product. Their compact design helps to optimise space in any room size as it eliminates the need for centrally stored hot water cylinders which also saves on electricity usage as they have no standby energy losses. Instantaneous water heaters  are suitable for installation in properties with minimal hot water requirements or remote areas of the home such as the garage.



The principal draw-back of instantaneous electric water heaters is that the flow rate of hot water is limited by the electrical power rating; single phase units have power ratings of up to 12kW and can provide maximum flow rates up to 6L/min (assuming a temperature increase from the incoming cold supply of 30°C). Where three phase electricity is available (normally only in commercial premises) instantaneous water heaters are available with power ratings of up to 27kW which can provide flow rates of up to 12L/min.



The Shop4 Electrical range of instantaneous water heaters are easy to install and are ideal for domestic or commercial applications where an endless supply of hot water is required. Safety and reliability is paramount in such heaters which is why they are fitted with a safety cut-out point to prevent overheating.

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  • Zip InLine ES
    The Zip InLine ES compact electronic instantaneous water heater provides energy efficient hot water for handwashing to a single outlet. The unit heats the water automatically as it flows through, without wasting energy in standby operation.

    The Zip InLine ES compact electronic instantaneous water heater provides energy efficient hot water for handwashing to a single outlet. The unit heats the water automatically as it flows through, without wasting energy in standby operation.

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  • Heatrae Sadia Multipoint Instantaneous
    Multipoint Instantaeous is a compact instantaneous water heater. It can supply a shower outlet and/or spray tap, provided only one outlet is used at a time. Ideal for supplying hot water to a remote area, such as garage or cloakroom.

    Multipoint Instantaeous is a compact instantaneous water heater. It can supply a shower outlet and/or spray tap, provided only one outlet is used at a time. Ideal for supplying hot water to a remote area, such as garage or cloakroom.

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  • Redring Powerstream Instantaneous Water Heaters
    The Redring Powerstream unvented instantaneous water heater delivers instant hot water at point of use. This compact and unique design eliminates the need for centrally stored hot water cylinders saving on electricity usage and important space.

    The Redring Powerstream unvented instantaneous water heater delivers instant hot water at point of use. This compact and unique design eliminates the need for centrally stored hot water cylinders saving on electricity usage and important space.

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  • Redring Powerstream Eco Instantaneous Water Heaters
    The Powerstream Eco delivers hot water instantaneously at the point of use, eliminating the need for a centrally located hot water cylinder and long pipe runs. With an Eco setting for ease of use and reduced running costs.

    The Powerstream Eco delivers hot water instantaneously at the point of use, eliminating the need for a centrally located hot water cylinder and long pipe runs. With an Eco setting for ease of use and reduced running costs.

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  • Redring TAP1 Instantaneous Hot Water Tap
    Hot water is delivered instantaneously at point of use with no requirement to store the water, minimising energy wastage and saving money. Suitable for all cold water systems and for a variety of applications.

    Hot water is delivered instantaneously at point of use with no requirement to store the water, minimising energy wastage and saving money. Suitable for all cold water systems and for a variety of applications.

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  • Santon Powerpack Instantaneous Water Heaters
    PowerPack is a compact instantaneous water heater. It can supply a shower outlet and/or spray tap, provided only one outlet is used at a time. PowerPack is ideally suited to supplying heated water to a remote area.

    PowerPack is a compact instantaneous water heater. It can supply a shower outlet and/or spray tap, provided only one outlet is used at a time. PowerPack is ideally suited to supplying heated water to a remote area.

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  • Stiebel Eltron DEM Instantaneous Water Heaters
    The DEM mini instantaneous water heater is the perfect choice for any location where smaller amounts of warm water are frequently drawn off. This appliance delivers water at the electronically controlled set temperature without having to overcome long supply line issues.

    The DEM mini instantaneous water heater is the perfect choice for any location where smaller amounts of warm water are frequently drawn off. This appliance delivers water at the electronically controlled set temperature without having to overcome long supply line issues.

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  • Hyco Rho Instantaneous Water Heaters
    Instantaneous thermostatic and non thermostatic Inline Water Heaters. Suitable for handwashing at a single sink.

    Instantaneous thermostatic and non thermostatic Inline Water Heaters. Suitable for handwashing at a single sink.

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  • Hyco Aquila Instantaneous Water Heaters
    Instantaneous thermostatic inline water heater. Suitable for hand washing at up to 2 basins, or for a single light shower, or light dishwashing.

    Instantaneous thermostatic inline water heater. Suitable for hand washing at up to 2 basins, or for a single light shower, or light dishwashing.

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  • Zip Inline CEX
    The CEX Series provide a constant supply of instant hot water at exactly the temperature selected with zero standing heat loss as there is no stored water. They represent the most energy efficient way of directly heating water electrically.

    The CEX Series provide a constant supply of instant hot water at exactly the temperature selected with zero standing heat loss as there is no stored water. They represent the most energy efficient way of directly heating water electrically.

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  • Zip DEX & DBX
    The Zip Water Heaters DEX and DBX Series are electronically controlled instantaneous electric water heaters for supplying single or multiple outlets utilising a three phase electicity supply. They represent the most energy efficient way of directly heating water electrically.

    The Zip Water Heaters DEX and DBX Series are electronically controlled instantaneous electric water heaters for supplying single or multiple outlets utilising a three phase electicity supply. They represent the most energy efficient way of directly heating water electrically.

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  • Stiebel Eltron DCE RC Remote Control Instantaneous Water Heater
    The space saving compact instantaneous water heaters are particularly suitable for kitchen sinks or for higher DHW convenience at washbasins and hand washbasins. They are electronically controlled to ensure accurate temperature delivery within the output range.

    The space saving compact instantaneous water heaters are particularly suitable for kitchen sinks or for higher DHW convenience at washbasins and hand washbasins. They are electronically controlled to ensure accurate temperature delivery within the output range.

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  • Stiebel Eltron DCE Instantaneous Water Heater
    The space saving compact instantaneous water heaters are particularly suitable for kitchen sinks or for higher DHW convenience at washbasins and hand washbasins. They are electronically controlled to ensure accurate temperature delivery within the output range.

    The space saving compact instantaneous water heaters are particularly suitable for kitchen sinks or for higher DHW convenience at washbasins and hand washbasins. They are electronically controlled to ensure accurate temperature delivery within the output range.

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  • Stiebel Eltron DHC-E Instantaneous Water Heater
    These electronic compact instantaneous water heaters reliably supply one or more draw-off points. Up to the output limit, hot water always flows at precisely the required temperature.

    These electronic compact instantaneous water heaters reliably supply one or more draw-off points. Up to the output limit, hot water always flows at precisely the required temperature.

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  • Stiebel Eltron DHE SLi Instantaneous Water Heater
    Sealed unvented (pressure-tested) for supplying several draw-off points. The DHW temperature can be variably preselected.

    Sealed unvented (pressure-tested) for supplying several draw-off points. The DHW temperature can be variably preselected.

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  • Stiebel Eltron DHB-E SLi Instantaneous Water Heater
    The DHB-E SL electronic unit offers all the major comfort settings you would expect to find in any electronically controlled instantaneous water heater. The actively-controlled heating output compensates for pressure fluctuations in the water supply.

    The DHB-E SL electronic unit offers all the major comfort settings you would expect to find in any electronically controlled instantaneous water heater. The actively-controlled heating output compensates for pressure fluctuations in the water supply.

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