Drinking Water

WaterDrinking water is precious and only available in limited amounts. Even though water covers approximately 71% of the Earth’s surface, only 2.6 to 3.5 percent is drinking water.

With an average annual rainfall of 537mm/m2 and approximately 20% of the drinking water worldwide, Canada has one of the most abundant water resources in the world. Yet it becomes more and more difficult to provide good quality drinking water.

To ensure that enough high quality drinking water will be available in the future, drinking water must be saved and substituted where possible. Economically sensible methods are, for example, water-saving faucets, rain water infiltration on private properties, and green roofs. Rain water systems can provide water for toilet flushing, laundry, and garden irrigation. When planning a rainwater system the local water supply and the use of the building should be taken into consideration.



Grey Water

n5n1uix2em_26a9eb30_e7ee_8393_31a2_ccba55360885Grey water is slightly soiled water that accumulates in every household from the shower, bathtub, sink and washing machine. It accounts for up to 50-60% of the total domestic waste water. Unlike rain water it is always available.

All water from these sources is suitable for treatment in a grey-water recovery system. The resulting service water is hygienically safe and suitable for toilet flushing, laundry, garden irrigation, and can be used for commercial applications. Read More


Rain Water Harvesting

RW_domesticEach citizen in Canada uses an average of 329 liters of drinking water per day (Statistics Canada 2004). 90 liters are used for toilet flushing alone, which along with garden irrigation can be considered a waste of drinking water. Read More


Grey Water Heat Recovery

Greywater_Recycling_Heat_Recovery_System_1Grey water is water from the bath tub, shower, sink and washing machine. It accumulates continuously and is warm, approximately 30 degrees Celsius. Every day a considerable amount of energy disappears with the grey water into the sewer system. A grey water heat recovery system uses the energy contained in the grey water. Read More


Rainwater for Laundry

Waschmaschine_energiesparsamEvery person in Canada uses 329 litres of drinking water per day on average. Approximately 25% or 82litres is used for laundry. A four person household uses 4 x 29930l/year = 119720l/year for laundry. Read More


Concrete Cistern or Plastic Tank?

water cisternRainwater use has become increasingly popular over the past years. An essential component of a rainwater system is the cistern. A cistern can be installed underground or in the basement. However, since there is a risk of unwanted backflow, and rain water tanks take up a lot of space they are usually not installed in the basement. Exceptions are areas that are prone to flooding, where it can be sensible to install the rainwater tank in the basement. Cisterns are available in either concrete or plastic. Read More