efficient-heat / Green Building & Sustainable Home Renovation Information & Advice

How well does a mini split heat pump work in a LEED or Passive House certified home?  Really well as it happens, see a great example of a split system heat pump installation in the Edelweiss LEED Platinum V4 Home below: The Edelweiss House has a radiant floor to keep our feet comfortable but we rely on a Mitsubishi Mr....

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...

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...

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...

SEER v HSPF v COP (& SCOP): Understanding Heat Pump Ratings Many people are considering making the switch to a heat pump, for a variety of different reasons, including the heat pump grants available in Canada and the USA to offset the cost and the potential cost savings of buying and installing a single unit that c...

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...

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...

After recently posting a story sharing the brilliance that is the Swedish Orbsys water and heat recycling shower, it was brought to our attention that there is a homegrown Canadian variety as well. The EcoVéa shower by Reveeco is made in Quebec, Canada, and works based on the same principles as the Orbys we recently wr...

Material choices for window frames: Window frames can be made from a variety of materials offering different levels of performance and insulation values. Air in the cavities between panes expands as it heats up and contracts as it cools, which puts pressure on the seals and frames. When we speak of durable and sturdy w...

How do the best heat pumps work? A heat pump works very differently than other home heating systems, in that it doesn’t ‘generate’ heat the way a furnace, boiler, radiator, oven or even a toaster or hair dryer would; instead, it collects heat from one place and transfers it to another. Think of your refrigerator as an ...

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 ...