Water use with energy-efficient faucets

VAMEB - Vattenanvändning med energieffektiva blandareGood energy classed faucets have features that reduce hot water use by influencing your behavior. But how much hot water is saved, and how does it affect you when dishwashing or showering? This we shall find out by measuring water consumption, and interviewing users in apartment buildings where energy classed faucets are installed.This has the project "Water use with energy-efficient faucets" taken into account by measuring water usage and interviewing tenants in some of AB Bostäders multi-purpose houses in Borås, where energy-efficient faucets have been installed.

The aim of the project was to increase knowledge on how to reduce both water and energy use by replacing "regular" faucets with energy labeled faucets, both in the short and long term. The project is mainly based on two sub-studies. One focuses on the installation of energy-labeled faucets and physical measurements of water consumption before and after installation. The other focuses on treatment and human behavior.

By switching to energy-efficient faucets, hot water usage can be decreased by close to 30 percent after switching to energy-labeled faucets. The study also included a behavior study and it shows that the acceptance of the faucets was comparable good at the residents where the energy efficient faucets had been installed.

 

The knowledge gained about the energy and water saving potential by installing energy labeled faucets will be communicated to a broad group of stakeholders, representing property owners, government agencies and companies in the industry.

Important results
  • Switching to energy efficient faucets can provide high energy savings. In this study, conducted in multi-family houses, it gave 28 percent energy savings.
  • Measurements show that the saving did not decrease over time.
  • The behavior study shows that the acceptance of the blends did not increase over time. One explanation may be that feedback on water use is missing in homes where water consumption is included in the rent.
  • Increasing acceptance and motivation for energy-saving measures by informing residents about the impact of the actions taken is an interesting area for further research.
Funding

Swedish Energy Agency (E2B2), AB Bostäder Borås, FM Mattsson, Villeroy & Boch Gustavsberg, JM, HSB, Skanska, and the National Board of Housing (Boverket)

Time schedule

1 September 2015 – 31 December 2017

Project partners

RISE - Research Institute of Sweden (former SP), AB Bostäder Borås, FM Mattsson, Villeroy & Boch Gustavsberg, Oras, JM, HSB, Skanska, and the National Board of Housing (Boverket)

RISE Research Institutes of Sweden, Phone 010-516 50 00, E-mail info@ri.se

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