Energy and Building Technology

Taking energy efficiency to new heights Bosch world-record dryer Efficiency that is 10 percent better than A+++ class

  • The most economical1 and the quietest2 dryer on the market3
  • Annual energy consumption: 158 kWh
  • Patented: a self-cleaning condenser
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  • October 30, 2014
  • Energy and Building Technology
  • Press releases

press release

        Anyone who wants to help protect the environment can use the most
        economical dryer in the world. Even drying laundry on a rack
        consumes more energy.

Munich – A world record in the laundry room: the new Bosch HomeProfessional WTY887W3 dryer is currently the most economical and the quietest dryer in its class. With its annual energy consumption of 158 kilowatt-hours (kWh), this appliance knocks another 10 percent off the best efficiency class A+++ – making it the world's most efficient dryer. One of the reasons is that its optimized EcoSilence compressor compresses the coolant extremely quickly and flexibly. Then there is the self-cleaning condenser, which Bosch has patented. Thanks to an automatic rinsing system, the condenser no longer needs to be cleaned. That means the dryer's electricity consumption will stay low throughout its service life.

Protecting the environment
Dryers in efficiency class A+++ are on average 63 percent more economical than dryers in class A. According to Bosch's own estimates, buying an A+++ class dryer makes most sense for multi-person households that want to make a lasting cut to their energy costs and at the same time help to protect the environment. For comparison, standard condenser dryers achieve no better than energy efficiency class B.

Even drying clothes on a rack is no match. Back in 2008, the German Institute for Applied Ecology confirmed in its study entitled “A comparison of the environmental impact and costs of various clothes drying systems” that a Bosch condenser dryer (in this case the EcoLogixx) featuring heat-pump technology consumes up to three times less energy than line drying – depending on how homes are ventilated. During ventilation, warm, damp air is replaced with dry, cold air – with the home heating left to make up for the resulting drop in temperature.

Washing machines remove the majority of the water from washed laundry during their spin cycle. But a lot of moisture still remains bound up in the fabric. Dryers pass warm, dry air through the damp laundry, causing the water to evaporate. Next, the hot, damp air is cooled so that the water from the laundry condenses out for collection in a container.

Link to the study (German version):

Readers' contact:
Astrid Zászlo,
phone: +49 (0)89 4590 290

1It is 10% more efficient (158 kWh/year) than the threshold value for energy efficien-cy class A+++ for tumble dryers with an 8 kg capacity (177 kWh/year), as per Regulation (EU) 392/2012.
2At just 61 dB(A) re 1pw, it has the lowest noise emissions in the heat-pump dryer category on the standard cotton program at full load in accordance with Regulation (EU) No. 392/2012. (As of: August 6, 2014)
3As of: August 6, 2014

The Bosch Group is a leading global supplier of technology and services. It employs roughly 375,000 associates worldwide (as of December 31, 2015). The company generated sales of 70.6 billion euros in 2015. Its operations are divided into four business sectors: Mobility Solutions, Industrial Technology, Consumer Goods, and Energy and Building Technology. The Bosch Group comprises Robert Bosch GmbH and its roughly 440 subsidiaries and regional companies in some 60 countries. Including sales and service partners, Bosch’s global manufacturing and sales network covers some 150 countries. The basis for the company’s future growth is its innovative strength. Bosch employs 55,800 associates in research and development at 118 locations across the globe. The Bosch Group’s strategic objective is to deliver innovations for a connected life. Bosch improves quality of life worldwide with products and services that are innovative and spark enthusiasm. In short, Bosch creates technology that is “Invented for life.”

The company was set up in Stuttgart in 1886 by Robert Bosch (1861-1942) as “Workshop for Precision Mechanics and Electrical Engineering.” The special ownership structure of Robert Bosch GmbH guarantees the entrepreneurial freedom of the Bosch Group, making it possible for the company to plan over the long term and to undertake significant up-front investments in the safeguarding of its future. Ninety-two percent of the share capital of Robert Bosch GmbH is held by Robert Bosch Stiftung GmbH, a charitable foundation. The majority of voting rights are held by Robert Bosch Industrietreuhand KG, an industrial trust. The entrepreneurial ownership functions are carried out by the trust. The remaining shares are held by the Bosch family and by Robert Bosch GmbH.

Additional information is available online at and,

PI8743 - October 30, 2014

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