Water Heaters Electric
Storage of 50L and Above : Unvented Direct Units Mains Pressure Electric
Free delivery over £50

See Also   Time Controllers  Smaller Units  Unvented 'mains pressure' units below 50L capacity are electrically heated and operate at the same mains pressure as the incoming cold water supply (typically 3 bar or so) and therefore provide excellent hot water flow rates.   Indirect Units Unvented hot water cylinders are now the most popular option for new hot water systems and operate at the same mains pressure as the incoming cold water supply. In 'indirect' units the heat source is an external boiler that circulates hot water through a coil heat exchanger within the cylinder


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Simple guide to unvented direct mains pressure electric water storage heaters over 50 litres capacity Unvented hot water cylinders are now the most popular option for new hot water systems and operate at the same mains pressure as the incoming cold water supply (typically 3 bar or so) and therefore provide excellent water flow rates without requiring an header tank in the loft space or additional pumps. In 'direct' units the water is heated by one or more electric immersion heaters. They come into their own when a gas/oil boiler is either not available or too expensive to install, or in situations where the requirement for annual gas safety checks of appliances, flues and pipework is considered onerous, for example at rental properties. They are also suitable for a wide range of commercial applications such as hair dressing salons, canteens, washroom areas etc.

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Image for Powerflow 50L
Hyco Powerflow 50L

Hyco Unvented Direct Water Heaters The Hyco Powerflow series of unvented electric water heaters can be used to provide hot water in locations that are remote from an existing hot water system or where there is no central system at all. Typical situations include small industrial units, warehouses, cafes, canteen areas, washrooms and domestic situations such as additional bathrooms, loft conversions, etc. Stainless steel tank. Factory fitted temperature and pressure relief valve.

Capacity 50 Litres | Power 3kW | Dimensions 915 x 380 x 295mm (H x W x D)

Size: Single
Order Code: PF50
Price: £255.00
Price inc. VAT: £299.63
Image for Powerflow 90L
Hyco Powerflow 90L

Hyco Unvented Direct Water Heaters The Hyco Powerflow series of unvented electric water heaters can be used to provide hot water in locations that are remote from an existing hot water system or where there is no central system at all. Typical situations include small industrial units, warehouses, cafes, canteen areas, washrooms and domestic situations such as additional bathrooms, loft conversions, etc. Stainless steel tank. Factory fitted temperature and pressure relief valve.

Capacity 90 Litres | Power 3kW | Dimensions 930 x 540 x 385mm (H x W x D)

Size: Single
Order Code: PF90
Price: £290.00
Price inc. VAT: £340.75
Image for ST ProTech Wall Hung 50L Direct
Ariston ST ProTech Wall Hung 50L Direct

Ariston Unvented Direct Water HeatersQuality steel tank - 12 bar pressure tested and exclusive viterous enamel coating. Environmentally sound and highly efficient thermal insulation. ProTech anti-corrosion system. Internal regulation thermostat adjustable to 70°C. Factory fitted ½" T&P relief valve. Dual Pole Thermal Cut-Outs Unvented Control Kit supplied with cylinder at no additional cost. Space saving wall fixing. Simple Installation. 10 Year Tank Guarantee (2 year guarantee on electrical components).

Capacity 50 Litres | Elements 3kW | Dimensions 630 x 460 x 460mm (H x W x D)

Size: Single
Order Code: ST50-WW
Price: £309.00
Price inc. VAT: £363.08
Image for ST ProTech Wall Hung 80L Direct
Ariston ST ProTech Wall Hung 80L Direct

Ariston Unvented Direct Water HeatersQuality steel tank - 12 bar pressure tested and exclusive viterous enamel coating. Environmentally sound and highly efficient thermal insulation. ProTech anti-corrosion system. Internal regulation thermostat adjustable to 70°C. Factory fitted ½" T&P relief valve. Dual Pole Thermal Cut-Outs Unvented Control Kit supplied with cylinder at no additional cost. Space saving wall fixing. Simple Installation. 10 Year Tank Guarantee (2 year guarantee on electrical components).

Capacity 80 Litres | Elements 3kW | Dimensions 790 x 460 x 460mm (H x W x D)

Size: Single
Order Code: ST80-WW
Price: £349.00
Price inc. VAT: £410.08
Image for Classico 150L Direct
Ariston Classico 150L Direct

Ariston Unvented Direct Water HeatersQuality steel tank, 12 bar Pressure tested and exclusive vitreous enamel coating (glass lining). Environmentally sound and highly efficient thermal insulation. All plumbing and electrical connections within a 90° angle. Magnesium anode to protect against corrosion. Immersion heaters supplied with regulation thermostats and dual pole thermal cut-outs. Factory fitted 1/2" Temperature and Pressure relief valve. Unvented control kit supplied with cylinder. Simple installation. 5 year tank guarantee (2 year guarantee on electrical components).

Capacity 150 Litres | Elements 2 x 3kW | Dimensions 1155 x 505 x 505mm (H x W x D)

Size: Single
Order Code: STD150-WW
Price: £359.00
Price inc. VAT: £421.83
Image for ST ProTech Wall Hung 100L Direct
Ariston ST ProTech Wall Hung 100L Direct

Ariston Unvented Direct Water HeatersQuality steel tank - 12 bar pressure tested and exclusive viterous enamel coating. Environmentally sound and highly efficient thermal insulation. ProTech anti-corrosion system. Internal regulation thermostat adjustable to 70°C. Factory fitted ½" T&P relief valve. Dual Pole Thermal Cut-Outs Unvented Control Kit supplied with cylinder at no additional cost. Space saving wall fixing. Simple Installation. 10 Year Tank Guarantee (2 year guarantee on electrical components).

Capacity 100 Litres | Elements 3kW | Dimensions 750 x 560 x 560mm (H x W x D)

Size: Single
Order Code: ST100-WW
Price: £369.00
Price inc. VAT: £433.58
Image for Primo Stainless Steel 100L Direct
Ariston Primo Stainless Steel 100L Direct

Quality stainless steel tank 12 bar pressure tested. Environmentally sound and highly efficient thermal insulation. Compact design - slimmest available on the market (up to 200 litres). All plumbing and electrical connections within a 90° angle. Exclusive high quality ‘orange-peel’ outer finish. Immersion heaters supplied with regulation thermostat and dual pole thermal cut-out. Factory fitted 1/2” T&P relief valve. Unvented control kit supplied with cylinder. Simple installation. 25 year tank guarantee. 2 year guarantee on electrical components.

Capacity 100 Litres | Elements 2 x 3kW | Dimensions 845 x 505 x 505mm (H x W x D)

Size: Single
Order Code: ITD100-WW
Price: £379.00
Price inc. VAT: £445.33
Image for Aquapoint III Unvented Water Heater - 50L
Zip Aquapoint III Unvented Water Heater - 50L

Zip Unvented Direct Water HeatersLarge capacity unvented heater for single or multiple outlets Zip. Factory fitted pressure and temperature relief valve. External temperature control with frost protection. Sacrificial anode for protection against aggressive water conditions. Easy to service element. For use with standard mixers and taps. Ingress protection to IP24. Glass lined steel storage tank tested to 12 bar. Element ‘ON’ neon indicator. External temperature control with frost protection. Visible temperature indicator. Elements can be replaced without draining down.

Capacity 50 Litres | Elements 1 x 3kW | Dimensions 690 x 500 x 512mm (H x W x D)

Size: Single
Order Code: AP350
Price: £386.00
Price inc. VAT: £453.55
Image for PremierPlus Unvented Water Heater - 100L Direct
Santon PremierPlus Unvented Water Heater - 100L Direct

Santon Premier Plus Unvented Direct Water Heaters Manufactured to the highest standards from high grade Duplex stainless steel, the units offer exceptional corrosion resistance and a long life expectancy. It provides mains pressure showering and is suitable for use in new build or refurbishment schemes for domestic or commercial applications. PremierPlus has been designed with features that benefit specifiers, installers and end users. These benefits combine to make PremierPlus exceptional value for money. 25 year cylinder guarantee. Mains pressure hot water for balanced supply to showers and mixers - no shower pump to consider. High flow rates give improved hot water delivery. Complete package incorporates safety and hot water controls.

Capacity 100 Litres | Elements 1 x 3kW | Dimensions 784 x 550 x 550mm (H x W x D)

Size: Single
Order Code: PP100EDIR-WW
Price: £395.00
Price inc. VAT: £464.13
Image for Aquapoint III Unvented Water Heater - 80L
Zip Aquapoint III Unvented Water Heater - 80L

Zip Unvented Direct Water HeatersLarge capacity unvented heater for single or multiple outlets Zip. Factory fitted pressure and temperature relief valve. External temperature control with frost protection. Sacrificial anode for protection against aggressive water conditions. Easy to service element. For use with standard mixers and taps. Ingress protection to IP24. Glass lined steel storage tank tested to 12 bar. Element ‘ON’ neon indicator. External temperature control with frost protection. Visible temperature indicator. Elements can be replaced without draining down.

Capacity 80 Litres | Elements 1 x 3kW | Dimensions 950 x 500 x 512mm (H x W x D)

Size: Single
Order Code: AP380
Price: £412.00
Price inc. VAT: £484.10
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