GasSaver improves the efficiency of hot water production and saves fuel and money.
Without a GasSaver installed flue gases that escape to the atmosphere can exceed 60°C.
A Passive Flue Gas Heat Recovery Device reclaims much of this wasted heat, which means that the flue gases that vent into the atmosphere are therefore much cooler.
A heat exchanger is fitted around the flue coming from the boiler to heat up the mains cold water that is fed into it. GasSaver then stores the heated water in a tank for use later on.
Passive Flue Gas Heat Recovery Devices are listed under SAP appendix Q with an independently assessed, additional energy saving rating.
Before buying one, check what type of boiler you have to see what savings are possible. Since 2005 the vast majority of gas boilers fitted in the UK have been more efficient, condensing boilers. However, the way energy labelling is done can be mis-leading as it does not take into account the energy lost, even by 'A' rated boilers, that can be re-used for domestic water production.
The GasSaver passive flue gas heat recovery device provides the only way to get maximum, nearly 100% efficiency from your boiler.
A short video Showing how a passive flue gas heat recovery device re-uses wasted energy to heat domestic hot water.
Seasonal demand for hot water graph