On standard taps, the continuous flow heater or circulation pump starts up immediately when the handle is in the middle position. That does not have to be the case. On CoolStart taps from hansgrohe, only cold water flows initially. So your pipes are not filled with hot water unnecessarily. Only when you deliberately move the lever to the left does hot water get added. Good for the environment and your wallet!
With hansgrohe CoolStart, hot water only flows when you really need it. The energy required for this is only accessed when you actively move the tap lever to the left. You decide how high the temperature needs to be. It is not possible to move the lever to the right. This means that the energy-intensive preparation of hot water is limited to situations where it is truly needed. For briefly washing your hands, hot water is not usually required.
Our example calculation shows how much: A household of four using a hansgrohe CoolStart faucet for 20 minutes a day for a year can consume 508 kilowatt hours less energy than with a conventional faucet. To make this figure less abstract – with 500 kWh, you could:
By way of background: Roughly 90% of a household’s CO2 emissions are the result of providing hot water for the shower, bath tub, and sink. An example calculation: A household of four that heats water with gas can use 23 kilograms less CO2 annually with a CoolStart faucet than with a conventional faucet. Specifically:
This is especially important in times when energy prices are skyrocketing. An example calculation: A household of four that heats water with gas can save 61.97 euros every year by replacing their old faucet with a CoolStart model. By the way:
The base for these calculations can be found at the bottom of this page.*
Vernis Shape Single lever basin mixer 70 CoolStart with isolated water conduction and pop-up waste set
Vernis Shape Single lever basin mixer 100 CoolStart with isolated water conduction and pop-up waste set