hansgrohe CoolStart

Get into the habit of saving energy with CoolStart taps

hansgrohe CoolStart taps are environmentally friendly: Only cold water will flow when the handle is in the middle position, whereas energy is immediately consumed with standard taps in the same position. So with CoolStart technology, your pipe system will not be filled with warm water unnecessarily. The result? Fewer resources consumed, lower CO2 emissions, cheaper costs. Good for the environment and your wallet! 

Save energy at home with hansgrohe CoolStart.
When the handle is in the middle position, hansgrohe CoolStart taps only supply cold water. Warm water will only flow when you want it to. Simply turn the lever to the left for more heat.

How to reduce your warm water costs on a day-to-day basis 

Where can we save energy, how do we send less CO2 into the atmosphere, what can we do to combat climate change? These are questions that concern us all. The best approach is to find solutions for the energy consumers in our home that we use several times a day. Basin taps, for example. The hansgrohe CoolStart concept is as simple as it is ingenious: Warm or hot water will only flow out of these taps when it is actually needed. You only use the energy when you actively turn the lever handle to the left.

CoolStart: Saving energy at home couldn’t be easier

Standard taps work differently: Continuous flow heaters, circulation pumps and other water-heating mechanisms kick in as soon as the lever is activated in the middle position. But we don’t always need warm water, right? Cold water is often what we want when pouring drinking water, washing hands, watering flowers or cleaning. And that’s the kicker: Water is only heated in CoolStart taps when you see a need for it. You alone decide how hot to make it – several times a day. Typically hansgrohe: Enjoy total comfort and beautiful design with an economical CoolStart tap.

Save energy at home and enjoy beautiful design

Reduce your warm water consumption and your carbon footprint and save money along the way!

Reduce warm water consumption with CoolStart taps.
hansgrohe doesn’t want you to watch TV 24/7. But we do want to help you to budget well when it comes to precious resources. Our product developers are working around the clock on solutions to this issue.

Having a cool start saves energy.

How much? Here’s our example calculation: A four-person household that uses a hansgrohe CoolStart tap for 20 minutes every day for a year can consume 508 kilowatt hours less energy than it would with a standard tap. To put this into perspective, with 500 kWh, you can:

  • Make 67,564 slices of toast
  • Watch TV 24/7 for at least a year
  • Use a hairdryer for 500 hours.

Having a cool start reduces your carbon emissions.

By way of background: Roughly 90% of CO2 emissions in the bathroom occur in the utilization phase i.e. through the providing of hot water for the shower, bath tub, and sink. Example calculation: A four-person household that heats water with gas can consume 23 kilograms less CO2 per year with a CoolStart tap than with a conventional tap. To put this into perspective:

  • Two mature beech trees standing at 23 metres in height would take two years to offset these 23 kilos.  

Having a cool start saves money.

In times when energy prices are soaring, this is so important. Example calculation: A four-person household that heats water with gas can save 61.97 euros every year simply by replacing their old tap with a CoolStart model. By the way:

  • A CoolStart tap will pay for itself after less than two years.  

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

Find your CoolStart tap and start making savings:

*The energy savings expressed as a percentage show how much a hansgrohe CoolStart product can save compared to a standard hansgrohe product without CoolStart technology. 

The calculation for the use of a basin tap is based on an average consumption of 5 litres per minute at 3 bar. This value must be adapted to the individual to get the most accurate result possible. Energy needed to heat 1 litre of water by 1°C: 1 kcal or 0.00116 kWh. Energy needed to heat 1 litre of water from 10°C to 35°C (the temperature of water from a basin tap): 0.029 kWh/litre of water [calculated using an energy formula based on the general calculation principles according to the International System of Units (SI). Conversion of kWh to oil: 10 kWh = 1 litre of oil]. 

The energy costs suggested here are the average for Germany and must be adapted to the individual to get the most accurate result possible. It was assumed that household appliances would consume 12.2 cents/kWh of energy based on these values (valid as at 04/2022).

Hansgrohe SE cannot guarantee the accuracy of the results. The calculation can be influenced by several unforeseeable factors and is therefore non-binding. It mainly depends on energy prices. 

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