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Water Saving Calculator for Mixer Showers (not Electric Showers)
The first step to saving water and energy is knowing exactly how much you are using. By purchasing a Water Flow Rate Testing Bag this will allow you to see the water consumption and be able to make in informed decisions about water and energy saving.
For example if you have a high flow 12L/min shower head (not unusual), you spend 10 minutes in the shower on average, once a day, 320 times a year, you will use £201 of water and gas PER person per year
You change to a 6L/min shower head, you reduce your time to 5 minutes in the shower, once a day, 320 times a year, you will use £52 of water and gas PER person per year
Please use the calculator below to show the possible water and gas savings you can achieve.
Shower Cost Savings Calculator (based on gas boiler and mixer shower)
*0.45p/L for metered water includes wastewater charge. Utility companies assess the amount of wastewater based on the amount of metered water consumed, therefore if you spend longer in the shower, your wastewater charges also go up. Some water companies offer lower pence/litre supply and wastewater charges for higher consumption rates. Combined water supply and wastewater charges can be a low as 0.30p/litre in some areas.
** 0.015m3/min gas consumption is based on a condensing boiler typically fitted within the last 10-15 years which almost always has a modulating gas burner. You can tell if it is a condensing boiler if it has a condensate drainpipe beneath it. This means, the condensing boiler turns down the gas flow depending on the amount of hot water being used. Full flow hot water means high gas usage, but a low 6 or 8 litre per minute gas flow means less gas per minute used by the boiler.