hansgrohe CoolStart

CoolStart faucets help you find the right twist to save energy

hansgrohe CoolStart faucets are eco-friendly, only running cold water in the handle center position – whereas with standard faucets, energy is consumed immediately. With CoolStart technology, your plumbing doesn’t get filled with unneeded hot water. The result: fewer resources, CO2 emissions, and costs. Good for the environment and your wallet!

Save energy at home with hansgrohe CoolStart.
In the center handle position, hansgrohe CoolStart faucets only run cold water. Hot water only flows when you want it to. To do so, simply turn the lever to the left.

How to reduce your hot water costs day in, day out 

Where can we save energy, how do we send less CO2 into the atmosphere, what can we do to combat climate change? These questions are on everyone’s mind. The best place to look for answers is in the energy consumers in our homes that we use several times a day, like lavatory faucets. The hansgrohe CoolStart principle is as simple as it is ingenious: With these faucets, warm or hot water only flows when you really need it. You only call up the necessary energy when you actively move the handle to the left.

CoolStart: Saving energy at home is easy

Standard faucets work differently: The continuous flow heater, circulating pump, and other water heaters already start up when you press the lever in the home position. But we don’t always need hot water, do we? When it comes to having a drink, washing our hands, watering flowers, or getting some cleaning done, cold water is often enough. That’s exactly the trick: CoolStart faucets only heat water when you see a need. You alone decide how high the temperature should be – however many times a day. Typical hansgrohe: with an economical CoolStart faucet, you can enjoy full convenience and beautiful design.

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 faucet and save:

*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. 

Trusted partners

Find bathroom showrooms in your area