Saving energy made easy

CoolStart: Hot water flows only when it’s needed

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, your plumbing doesn’t get filled with unneeded hot water. The result: fewer resources, CO2 emissions, and money spent. For hotels, the savings potential is tremendous.

Reduce hot water costs and protect the environment, day after day

These days, everybody's asking themselves, ‘Where can we save energy? How can we send less CO2 into the atmosphere?’ Individual shoppers are looking for answers in commonly used energy consumers at home. And commercial customers know how much the costs can add up when they have water/energy guzzlers installed in their businesses.

It’s best to invest in economical, energy-efficient products right away. With CoolStart faucets, warm or hot water only flows when you really need it. Users only use energy to heat the water when they actively move the faucet lever to the left.

CoolStart: Save energy with the right twist

Standard faucets work differently: the continuous flow heater, circulating pump, or other water heater starts up as soon as you press the lever in the home position. But you don’t always need hot water. Cold water is often sufficient for getting a drink, washing hands, brushing teeth, watering flowers, or cleaning. 

CoolStart faucets only heat water when you see a need for it. Users decide how hight the temperature should be – however many times a day. Typical hansgrohe: with economical CoolStart faucets, you can enjoy full convenience and modern design. The CoolStart range is aimed at a wide target group and offers professionals fantastic sales opportunities. 

Saving energy every day with CoolStart faucets.
Whether you’re a specialty bathroom retailer or you work in the project business: Your best selling point for CoolStart is the savings potential and helping the environment.

CoolStart calculation examples for saving money at home

If you start cool, you can save energy. A household of four using a CoolStart faucet for 20 minutes a day for a year can consume 508 kilowatt hours less energy than with a conventional faucet. 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 CO2 emissions in the bathroom come from the use phase: generating hot water for the shower, bath tub, and sink. A household of four that heats water with gas can use 23 fewer kilograms of CO2 each year with a CoolStart faucet than with a conventional faucet. To put this in concrete terms:

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

If you start cool, you can save cash. This is essential in times when energy prices are skyrocketing. 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 basis for these calculations can be found at the bottom of this page.*

Lavatory faucets with CoolStart technology
hansgrohe wants to support consumers, customers, and guests in making good use of precious resources. Technologies such as CoolStart or EcoSmart are a great help in this regard.

Select products with CoolStart technology

* 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.