hansgrohe CoolStart

CoolStart taps to save water, save money

hansgrohe CoolStart taps are eco-friendly, only running cold water from the handle positioned in the center.  This is an improvement from standard taps where energy is consumed immediately. With CoolStart technology, your water system does not get filled with hot water at all times. The result? Fewer resources consumed, lower CO2 emissions, cheaper costs. Good for the environment and your wallet!

Save energy at home with hansgrohe CoolStart taps
hansgrohe CoolStart taps only supply cold water when the handle is positioned in the center. Warm water will only flow when you turn the lever to the left.

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

Where can we save energy? How do we generate less CO2? What can we do to combat climate change? These are environmental concerns that affect everyone. The best solutions to these concerns are to identify the sources which we consume energy in our home, multiple times a day. For example, basin taps.

The hansgrohe CoolStart concept is as simple as it is ingenious: Warm or hot water will only flow out of hansgrohe CoolStart taps when you actually need it. This means that you only use the energy when you move the lever handle to the left.

CoolStart: Saving energy at home is easy

Standard taps work differently: Most of the water heater systems such as continuous flow heaters and circulation pumps start to heat up the water as soon as you move the lever to turn on water flow. But it is not every instance that we need warm water. Where it comes to drinking, washing our hands, water flowers or light cleaning, cold water is often enough. 

With CoolStart taps, water is only heated when you need it. Plus, you can decide the temperature of the water in every instance it is needed. This means that we consume water and the energy to heat the water at the appropriate level only when required. In this way, we save water, save energy and save money. This is typically hansgrohe: Enjoy total comfort and beautiful design with an economical CoolStart tap.

Save energy at home and enjoy beautiful design

Lower warm water consumption, reduce your carbon footprint and save money

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.

Start cool, save energy.

How much? Here’s our calculation for the scenario with a four-person household: By using a hansgrohe CoolStart tap for 20 minutes everyday in a year, the household will consume 508 kilowatt hours less energy than with a conventional tap. To put this into absolute savings, with 500 kWh, you can:

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

Start cool, reduce CO2 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. Using the scenario with a four-person household who heats water with gas, it is possible to consume 23 kilograms less CO2 per year with a CoolStart tap than with a conventional tap. To put this into absolute savings:

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

Start cool, save money.

In times when energy prices are soaring, reducing consumption and saving is important. A four-person household that heats water with gas can save 61.97 euros every year simply by replacing their conventional tap with a CoolStart tap. In this way:

  • A CoolStart tap will pay for itself after less than two years with the amount saved!  

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

Find your CoolStart tap and start saving:

*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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Open Monday to Sunday | 11am to 8pm | Visits by appointment only | Last appointment at 7:30pm