efficient-water-heater / Green Building & Sustainable Home Renovation Information & Advice

Heat pump electric hot water heaters, good or bad idea? Water heaters are generally the biggest energy drain in a home after heating. so Air-to-water heat pump water heaters are potentially a big energy saver, particularly when the main heat source in a home is an air source heat pump, as the water heater can in effect...

There are many manufacturers of heat pump water heaters on the market, which, rather than heating water with an electric coil as a normal electric hot water tank does, employ an evaporator to extract heat from the air (either interior or exterior) and use it to make hot water. The byproduct of an air-to-water heat pump...

Tankless water heaters , on demand water heaters and  instantaneous water heaters are different names for the same thing - domestic hot water systems that do not include the storage tank that comes with traditional water heaters.  This type of water heating system can be advantageous in some climates, provided they use...

How to save money on hot water: We will discuss a number of ways to conserve water, particularly hot water, but all of that starts with using less in the first place! Choosing low flow fixtures and toilets will save a considerable amount of water and money, and probably the quickest and cheapest way to save hot water i...

We found this video at Whole Systems Design, a New England based company who identify, design, and develop human habitats. In their own words from their website : "We design and implement regenerative food, fuel, and shelter systems that operate on current solar energy. These are homesteads, farms and schools fit for a...

Our previous update covered aspects of the building envelope, which allowed us to reduce the annual heating requirement to about the Passive House standard of 15 kWh per square meter. Windows are a part of that but they are also part of our energy performance strategy. The house is laid out south facing to maximize pas...

Are low flow shower heads worth it? So, let's start with this somewhat shocking reality -  North Americans will on average use over 1.4 million litres of water per year, or about 4 to 5 times that of most European citizens. This is according to the SDWF (Safe Drinking Water Foundation). That makes Canada and the US the...

Toilets usually account for about a third of the indoor water use in a home, so toilets that carry the EPA WaterSense® label are a great place to start looking. Then comes the choice of either single flush or dual flush- it's a bit of a toss up but in the end we chose to go with single flush models, because when human ...

This is the fifth piece in a blog series written by Craig Anderson as he documents the design and construction of an off-grid LEED Gold passively-heated home. See post 1 of the off-grid homes blog here, the overview . or post 2 in the off-grid homes blog here covering design and construction choices. or here see post 3...

Sustainable construction is on the move! It seems almost every day a new and innovative product shows up on the market that is more efficient, more effective, greener and healthier. We regularly cruise the web looking for such gems and our latest find is a new system for greywater heat recovery that looks quite promisi...

What is a solar thermal collector? A photovoltaic (PV) solar collector converts solar radiation into electricity, but a solar thermal collector is much simpler than that. It refers to a device that collects heat directly from solar radiation. That can be as simple and rudimentary as water being pumped through a black t...