CombiSave - Energy Saving Valve for Combination Boilers Designed to combat the fact that even brand new A-rated boilers waste water, gas, time and money every time you turn on the hot tap. The CombiSave is an award-winning British innovation that can help you reduce the amount of water and gas used in the initial water heating process, saving you time and money, and helping the environment. If you have a combi-boiler and are on a water meter, then this device will save you money. CombiSave is a thermostatically operated valve set to become an essential add-on for new and existing combi boilers. CombiSave conserves Water 28,000 litres per year, that’s around £140. CombiSave reduces Gas Bills By about £50 in gas annually, but can be in excess of £100 CombiSave saves Money Less water and gas are used after CombiSave is fitted CombiSave provides Quicker Hot Water Some homes with a combination boiler wait over a minute for water to run hot from the tap; on average 21 hours of time person