An older and more traditional system type, gravity-fed (or vented) installations feature a conventional boiler and utilise gravity and convection to heat water and distribute it to taps and radiators, rather than the water being pumped. Cold water from tank(s) in the loft flows down by gravity to a water cylinder where it is heated, it’s then forced to hot water taps and radiators at low pressure.
Gravity-fed systems are no longer fitted new and do not comply to current building regulations, therefore homeowners are increasingly opting to replace older gravity-fed systems to either combi or fully-pumped conventional boiler systems.
Wiser is not compatible with traditional gravity-fed systems, because this type of system normally lacks water cylinder thermostats, motorised valves and external temperature controls, resulting in very limited thermostatic control which Wiser needs in order to work.
Wiser Thermostat and Multi-zone Kits 2 and 3 may be compatible with gravity-fed systems that have been retro-fitted or upgraded with pumps and cylinder thermostats.
If you're not sure whether your system is fully pumped, would like to know what changes may need to be made to your gravity-fed system to be compatible with Wiser, we encourage you to to contact our Support Team who'll help you find the kit you'll need on 0333 6000 622.