WATER HEATERS

Instantaneous Multi-Point Water Heater

These are room-sealed appliances (requires no ventilation) in common use, usually requiring 22mm gas supply pipe, giving continuous hot water to various taps.
They are totally independent of any central heating system so can be fitted in homes without central heating. They can also be used to give instant hot water with any other type of heating. When a hot tap is turned on, the burner fires heating the water and delivering it at about 8-10 litres/min (dependent on incoming water supply) for as long as the tap remains open.  Although several taps, showers etc, can be supplied, realistically water can only adequately flow from one draw off point at a time.  Most instant water heaters do not require any electrical connection and require no hot water storage facility. 

Central Heating Boilers

i.e Combination/Conventional/Storage Combination/ Conventional vented or unvented boiler. See Central Heating section.

Hot Water Storage Cylinders

Both conventional and pressurised hot water storage cylinders can be heated either by electricity or any central heating boiler or both together.  They are usually located in an airing cupboard together with their associated controls, central heating pump etc.  See Central Heating section

Sink Water Heaters

Small, flueless appliance giving single point continuous hot water to supply a single tap or spout. Because these appliances are unflued, siting and use restrictions apply.

All appliances should be installed and regularly serviced by a Gas Safe Registered gas installer.

Instantaneous Multi-Point Water Heater

Vaillant Combination
 Boiler

Conventional Hot Water Cylinder

Sink Water Heater