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Flomaster Copper Cylinder 1050 x 400mm Vented DirectFlomaster Copper Cylinder 1050 x 400mm Vented Direct
Flomaster Copper Cylinder 1050 x 400mm Vented Direct
114 litre Direct Kingspan Flomaster Copper Vented Cylinder - 1050 x 400mm The range of Flomaster Copper Vented Direct Hot Water Cylinders are manufactured by Kingspan who are recognised for quality products. This Flomaster Copper Hot Water Cylinder comes with a 2 year guarantee for peace of mind. To ensure maximum efficiency the cylinder is foamed with thick insulation, which reduces the heat loss...
£205.00 ex VAT
(£246.00 inc VAT)
Flomaster Copper Cylinder 1050 x 450mm Vented DirectFlomaster Copper Cylinder 1050 x 450mm Vented Direct
Flomaster Copper Cylinder 1050 x 450mm Vented Direct
140 litre Direct Kingspan Flomaster Copper Vented Cylinder - 1050 x 450mm The range of Flomaster Copper Vented Direct Hot Water Cylinders are manufactured by Kingspan who are recognised for quality products. This Flomaster Copper Hot Water Cylinder comes with a 2 year guarantee for peace of mind. To ensure maximum efficiency the cylinder is foamed with thick insulation, which reduces the heat loss...
£244.00 ex VAT
(£292.80 inc VAT)

Flomaster Copper Cylinder 1075 x 450mm Vented Combi Direct - Economy 7Flomaster Copper Cylinder 1075 x 450mm Vented Combi Direct - Economy 7
Flomaster Copper Cylinder 1075 x 450mm Vented Combi Direct - Economy 7
115 litre Combi Direct / Economy 7 - Kingspan Flomaster Copper Vented Cylinder - 1075 x 450mm The range of Flomaster Copper Vented Direct Hot Water Cylinders are manufactured by Kingspan who are recognised for quality products. This Flomaster Copper Hot Water Cylinder comes with a 2 year guarantee for peace of mind. To ensure maximum efficiency the cylinder is foamed with thick insulation, which...
£414.00 ex VAT
(£496.80 inc VAT)
Flomaster Copper Cylinder 1200 x 450mm Vented Combi Direct - Economy 7Flomaster Copper Cylinder 1200 x 450mm Vented Combi Direct - Economy 7
Flomaster Copper Cylinder 1200 x 450mm Vented Combi Direct - Economy 7
120 litre Combi Direct / Economy 7 - Kingspan Flomaster Copper Vented Cylinder - 1200 x 450mm The range of Flomaster Copper Vented Direct Hot Water Cylinders are manufactured by Kingspan who are recognised for quality products. This Flomaster Copper Hot Water Cylinder comes with a 2 year guarantee for peace of mind. To ensure maximum efficiency the cylinder is foamed with thick insulation, which...
£431.00 ex VAT
(£517.20 inc VAT)

Flomaster Copper Cylinder 1200 x 450mm Vented DirectFlomaster Copper Cylinder 1200 x 450mm Vented Direct
Flomaster Copper Cylinder 1200 x 450mm Vented Direct
162 litre Direct Kingspan Flomaster Copper Vented Cylinder - 1200 x 450mm The range of Flomaster Copper Vented Direct Hot Water Cylinders are manufactured by Kingspan who are recognised for quality products. This Flomaster Copper Hot Water Cylinder comes with a 2 year guarantee for peace of mind. To ensure maximum efficiency the cylinder is foamed with thick insulation, which reduces the heat loss...
£293.00 ex VAT
(£351.60 inc VAT)
Flomaster Copper Cylinder 1800 x 450mm Vented Combi Direct - Economy 7Flomaster Copper Cylinder 1800 x 450mm Vented Combi Direct - Economy 7
Flomaster Copper Cylinder 1800 x 450mm Vented Combi Direct - Economy 7
206 litre Combi Direct / Economy 7 - Kingspan Flomaster Copper Vented Cylinder - 1800 x 450mm The range of Flomaster Copper Vented Direct Hot Water Cylinders are manufactured by Kingspan who are recognised for quality products. This Flomaster Copper Hot Water Cylinder comes with a 2 year guarantee for peace of mind. To ensure maximum efficiency the cylinder is foamed with thick insulation, which...
£585.00 ex VAT
(£702.00 inc VAT)

Flomaster Copper Cylinder 900 x 400mm Vented DirectFlomaster Copper Cylinder 900 x 400mm Vented Direct
Flomaster Copper Cylinder 900 x 400mm Vented Direct
96 litre Direct Kingspan Flomaster Copper Vented Cylinder - 900 x 400mm The range of Flomaster Copper Vented Direct Hot Water Cylinders are manufactured by Kingspan who are recognised for quality products. This Flomaster Copper Hot Water Cylinder comes with a 2 year guarantee for peace of mind. To ensure maximum efficiency the cylinder is foamed with thick insulation, which reduces the heat loss...
£205.00 ex VAT
(£246.00 inc VAT)
Flomaster Copper Cylinder 900 x 450mm Vented Combi DirectFlomaster Copper Cylinder 900 x 450mm Vented Combi Direct
Flomaster Copper Cylinder 900 x 450mm Vented Combi Direct
85 litre Combi Direct Kingspan Flomaster Copper Vented Cylinder - 900 x 450mm The range of Flomaster Copper Vented Direct Hot Water Cylinders are manufactured by Kingspan who are recognised for quality products. This Flomaster Copper Hot Water Cylinder comes with a 2 year guarantee for peace of mind. To ensure maximum efficiency the cylinder is foamed with thick insulation, which reduces the heat...
£341.00 ex VAT
(£409.20 inc VAT)

Flomaster Copper Cylinder 900 x 450mm Vented DirectFlomaster Copper Cylinder 900 x 450mm Vented Direct
Flomaster Copper Cylinder 900 x 450mm Vented Direct
117 litre Direct Kingspan Flomaster Copper Vented Cylinder - 900 x 450mm The range of Flomaster Copper Vented Direct Hot Water Cylinders are manufactured by Kingspan who are recognised for quality products. This Flomaster Copper Hot Water Cylinder comes with a 2 year guarantee for peace of mind. To ensure maximum efficiency the cylinder is foamed with thick insulation, which reduces the heat loss...
£205.00 ex VAT
(£246.00 inc VAT)
Flomaster Copper Cylinder 1050 x 400mm Vented IndirectFlomaster Copper Cylinder 1050 x 400mm Vented Indirect
Flomaster Copper Cylinder 1050 x 400mm Vented Indirect
114 litre Indirect Kingspan Flomaster Copper Vented Cylinder - 1050 x 400mm The range of Flomaster Copper Vented Indirect Hot Water Cylinders are manufactured by Kingspan who are recognised for quality products. This Flomaster Copper Hot Water Cylinder comes with a 2 year guarantee for peace of mind. To ensure maximum efficiency the cylinder is foamed with thick insulation, which reduces the heat...
£231.00 ex VAT
(£277.20 inc VAT)

Flomaster Copper Cylinder 1050 x 450mm Vented IndirectFlomaster Copper Cylinder 1050 x 450mm Vented Indirect
Flomaster Copper Cylinder 1050 x 450mm Vented Indirect
140 litre Indirect Kingspan Flomaster Copper Vented Cylinder - 1050 x 450mm The range of Flomaster Copper Vented Indirect Hot Water Cylinders are manufactured by Kingspan who are recognised for quality products. This Flomaster Copper Hot Water Cylinder comes with a 2 year guarantee for peace of mind. To ensure maximum efficiency the cylinder is foamed with thick insulation, which reduces the heat...
£254.00 ex VAT
(£304.80 inc VAT)
Flomaster Copper Cylinder 1075 x 450mm Vented Combi IndirectFlomaster Copper Cylinder 1075 x 450mm Vented Combi Indirect
Flomaster Copper Cylinder 1075 x 450mm Vented Combi Indirect
115 litre Combi Indirect Kingspan Flomaster Copper Vented Cylinder - 1075 x 450mm The range of Flomaster Copper Vented Indirect Hot Water Cylinders are manufactured by Kingspan who are recognised for quality products. This Flomaster Copper Hot Water Cylinder comes with a 2 year guarantee for peace of mind. To ensure maximum efficiency the cylinder is foamed with thick insulation, which reduces the...
£336.00 ex VAT
(£403.20 inc VAT)

Flomaster Copper Cylinder 1200 x 450mm Vented Combi IndirectFlomaster Copper Cylinder 1200 x 450mm Vented Combi Indirect
Flomaster Copper Cylinder 1200 x 450mm Vented Combi Indirect
120 litre Combi Indirect Kingspan Flomaster Copper Vented Cylinder - 1200 x 450mm The range of Flomaster Copper Vented Indirect Hot Water Cylinders are manufactured by Kingspan who are recognised for quality products. This Flomaster Copper Hot Water Cylinder comes with a 2 year guarantee for peace of mind. To ensure maximum efficiency the cylinder is foamed with thick insulation, which reduces the...
£379.00 ex VAT
(£454.80 inc VAT)
Flomaster Copper Cylinder 1800 x 450mm Vented Combi IndirectFlomaster Copper Cylinder 1800 x 450mm Vented Combi Indirect
Flomaster Copper Cylinder 1800 x 450mm Vented Combi Indirect
206 litre Combi Indirect Kingspan Flomaster Copper Vented Cylinder - 1800 x 450mm The range of Flomaster Copper Vented Indirect Hot Water Cylinders are manufactured by Kingspan who are recognised for quality products. This Flomaster Copper Hot Water Cylinder comes with a 2 year guarantee for peace of mind. To ensure maximum efficiency the cylinder is foamed with thick insulation, which reduces the...
£597.00 ex VAT
(£716.40 inc VAT)

Flomaster Copper Cylinder 900 x 400mm Vented IndirectFlomaster Copper Cylinder 900 x 400mm Vented Indirect
Flomaster Copper Cylinder 900 x 400mm Vented Indirect
96 litre Indirect Kingspan Flomaster Copper Vented Cylinder - 900 x 400mm The range of Flomaster Copper Vented Indirect Hot Water Cylinders are manufactured by Kingspan who are recognised for quality products. This Flomaster Copper Hot Water Cylinder comes with a 2 year guarantee for peace of mind. To ensure maximum efficiency the cylinder is foamed with thick insulation, which reduces the heat...
£220.00 ex VAT
(£264.00 inc VAT)
Flomaster Copper Cylinder 900 x 450mm Vented Combi IndirectFlomaster Copper Cylinder 900 x 450mm Vented Combi Indirect
Flomaster Copper Cylinder 900 x 450mm Vented Combi Indirect
85 litre Combi Indirect Kingspan Flomaster Copper Vented Cylinder - 900 x 450mm The range of Flomaster Copper Vented Indirect Hot Water Cylinders are manufactured by Kingspan who are recognised for quality products. This Flomaster Copper Hot Water Cylinder comes with a 2 year guarantee for peace of mind. To ensure maximum efficiency the cylinder is foamed with thick insulation, which reduces the...
£308.00 ex VAT
(£369.60 inc VAT)

Flomaster Copper Cylinder 900 x 450mm Vented IndirectFlomaster Copper Cylinder 900 x 450mm Vented Indirect
Flomaster Copper Cylinder 900 x 450mm Vented Indirect
117 litre Indirect Kingspan Flomaster Copper Vented Cylinder - 900 x 450mm The range of Flomaster Copper Vented Indirect Hot Water Cylinders are manufactured by Kingspan who are recognised for quality products. This Flomaster Copper Hot Water Cylinder comes with a 2 year guarantee for peace of mind. To ensure maximum efficiency the cylinder is foamed with thick insulation, which reduces the heat...
£222.00 ex VAT
(£266.40 inc VAT)
FAQs
How Does a Hot Water Cylinder work?

Most hot water cylinders are heated by an external heat source such as a gas boiler or heat pump. The hot water is heated by the heat source and then travels through a copper coil in the hot water tank. The heat is then transferred from the from the external heat source to the water inside the hot water tank which is then connected to a tap or shower outlet.

How do I know if my heating system is a vented or unvented system?

The main differences between a vented and an unvented system is the way the water supply works. With vented or “open” systems, the water supply comes from a cold water tank in the loft. This then uses gravity to carry the water via a “vent pipe” to the hot water cylinder. The cylinder can be copper or stainless steel, and usually lives in an airing cupboard. Because heated water expands, there needs to be somewhere for the expanded hot water to go. In the case of vented systems, the excess water will push back up the vent pipe and back into the tank in the loft.

With unvented systems, the water supply comes directly from the mains water. In the case of unvented systems, when the heated water expands, the expanded water goes into either a separate external expansion vessel (usually installed above the hot water cylinder), or the hot water cylinder itself has an internal expansion vessel. You’ll hear this referred to as a “bubble top” cylinder. As with vented cylinders, the cylinder can be copper or stainless steel, and usually lives in an airing cupboard.

What hot water cylinder do I need for my heating source?

When the only option for the property is to heat the cylinder electrically through an immersion heater, you need to select a “direct” cylinder. When you have a conventional boiler as a heat source, you need to select an “indirect” cylinder. When the property has rentable heat sources available, you need to select either a “solar indirect” or “heat pump” cylinder. Solar indirect cylinders feature two heat exchanger coils, one for connecting to the solar heat source and the other for connecting to a conventional boiler for when insufficient solar energy is available.
When dealing with any unregulated heat source or there are multiple heat sources available, a “thermal store” will usually provide the best solution.

What size hot water cylinder do I need?

For those not familiar with hot water storage, it is important to remember it is usually held at about 60°C, but is intended to be mixed with cold water down to a usable temperature. A bath using 100 litres of hot water at 40°C actually only equates to 60 litres at 60°C. A shower can use 18 litres of hot water per minute at 40°C, which is only 11 litres at 60°C.
The following average consumption levels of hot water (40°C) per person per day can be used as a guide:

  • Low consumption = 20–30 litres
  • Average consumption = 30–50 litres
  • High consumption = 50–70 litres
What if I can’t fit a standard hot water cylinder in my airing cupboard?

With a smaller footprint to height ratio, slimline cylinders can often allow you to get through those narrow loft hatches or fit the cylinder in a tight airing cupboard. However, you will be compromising on the cylinders’ energy efficiency slightly, as tall cylinders such as these lose more heat than shorter fatter cylinders.
Another space-saving solution, a horizontal cylinder allows you to maintain cylinder capacity in situations where height restrictions apply. However, you should be aware horizontal cylinders are marginally less energy efficient with slightly higher heat loss.