Fitting a GasSaver 'top box' to our boilers is a simple way of taking energy efficiency to a higher level.

Positioned neatly above the boiler, this compact unit extracts heat from waste gases that are normally expelled into the atmosphere through the boiler flue. This is then used to preheat cold mains water before entering the boiler.

As the boiler is heating warmed water rather than cold, an average 35% less gas is used to produce hot water, reducing your energy bills and saving up to half a ton of carbon per year.


Features of the GasSaver
  • Uses 35% less gas
  • Easy to install
  • Increases boiler efficiency
  • Maintenance free
  • Reduces carbon emissions
  • Reduces gas consumption
  • Reduces nuisance pluming
  • Silent in operation
  • No electricity required
  • No special controls or settings means simple operation

How it works


First it stores the condensate normally expelled into the atmosphere through the boiler flue.


Then, heat from this condensate is recycled to pre-heat water coming into the boiler from the cold mains supply.


This significantly reduces the amount of gas required to heat the water by the boiler.


The amount of energy needed for the boiler to meet household demands is therefore reduced bringing lower energy bills and greater carbon savings.


  • GasSaver Installation and Servicing Instructions (0.37mb)
  • GasSaver Schematic Diagram (0.06mb)
  • GasSaver with SolarSmart 90 (0.05mb)
  • GasSaver with SolarSmart 150 (0.15mb)

Product Specification

Model GasSaver
Height (mm) 278
Width (mm) 400
Maximum depth (mm) 285
Maximum working pressure (bar) 5
Water store (litres) 5.5
Water inlet (mm) 15
Water outlet (mm) 15
Flue / Connections Boiler specific

Products in this Range

InTec 40GS2

Combination boiler with built-in GasSaver.

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