hansgrohe CoolStart

Discover how to save energy with CoolStart

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!

Save Energy with hansgrohe CoolStart.
In the middle position, taps with CoolStart only supply cold water. Hot water only flows when you turn the lever to the left.

Reduce your water heating costs automatically

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. 

Save energy at home and enjoy beautiful design

Lower hot water consumption, reduce CO2 footprint, save money

Reduce hot water consumption with CoolStart faucets.
hansgrohe doesn’t want you to watch TV 24/7. But we do want to help you make good use of precious resources. That’s what our product developers work toward 24/7.

If you start cool, you can save energy.

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:

  • Toast 67,564 slices of toast
  • Watch TV 24/7 for over a year
  • Blow dry your hair for 500 hours straight

If you start cool, you can reduce your CO2 emissions.

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:

  • Two mature, 75-foot-tall beech trees would need two years to compensate for these 23 kilograms.  

If you start cool, you can save cash.

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:

  • A CoolStart faucet pays for itself in less than two years.  

The base for these calculations can be found at the bottom of this page.*

Find your CoolStart tap and start make savings:

*The percentage energy savings show the savings of a hansgrohe CoolStart product compared to a conventional hansgrohe product without CoolStart. 

The calculation of the use of a lavatory faucet is based on an average consumption of 5 liters per minute at 3 bar. To obtain the most accurate result, this value must be individually adjusted. Energy required to heat 1 liter of water by 1 °C: 1 kcal or 0.00116 kWh. Energy required to heat 1 liter of water from 10 to 35 °C (water temperature of a lavatory faucet): 0.029 kWh/liter of water [calculated with energy formula based on the General Calculation Principles according to the International System of Units (IS). Conversion from kWh to oil: 10 kWh = 1 liter of oil]. 

The energy prices proposed here correspond to average values for Germany and must be individually adjusted for the most accurate result. 12.2 ct/kWh was assumed. Energy consumption of household appliances based on these values (as of 04/2022).

Hansgrohe SE cannot guarantee or warrant the accuracy of the results; the calculation is dependent on many unforeseeable factors and therefore remains non-binding. In particular, it is dependent on energy prices.