Last year we took possession of a new home that surpassed an energy rating of Energuide 86. Because of that, Climate Change Central, an arms-length government organization, mailed us a $10,000 cheque.

What we really need is a carbon tax. Economists (the good kind) and environmentalists agree, putting a price on carbon is the simplest, most effective way of changing people’s earth-destroying ways. And I don’t buy the argument that Stephane Dion’s doomed election campaign proved that Canadians don’t want a carbon tax. The nerdiest, least competent Liberal leader in a generation lost that campaign for reasons other than his Green Shift idea.

Since a carbon tax is a political hot potato right now, one behaviour-changing alternative is the green subsidy. I have to give the Progressive Conservatives credit, this is no longer Ralph Klein’s Alberta. Stelmach’s government recently enacted an excellent net metering policy, and they also introduced the new home rebate policy.

With the right builder, we estimate that the incremental cost to building a house to meet Energuide 86, which would include excellent windows (triple-pane, low-e coating, insulating spaces, etc.), at least R40 walls, R60 in the ceiling, and a very tightly-sealed envelope, is $20,000-$25,000. With the $10,000 incentive, that cost is now ridiculously low.

Build a house that is extremely cheap to heat, much more comfortable in the winter, and cool in the summer. And get paid ten grand to do it - it’s a no-brainer.

Climate Change Central has another three years of funding in place (it may be extended beyond that time). Ask your builder to save you $10,000 today. If your builder can’t build an Energuide 86 house, find another one.

Editor’s Note: I’ve written about Rob Dumont in the past. He is one of the fathers of the green building movement, and I’m very pleased to have permission to reprint one of his columns here.

By Rob Dumont

Have there been any recent advances in the area of passive solar heating for residences?

Passive solar heating has been known since the time of Socrates. However, it is only slowly catching on in Canada. Improved windows have made the recent advances possible.

In the 1970s there developed two schools of thought regarding how best to reduce space heating bills in residences using passive means. One school was called the “mass and glass” school. With this approach, large south facing windows would be used along with concrete slabs and heavy construction such as adobe. This school had a lot of proponents coming out of the south-western United States. New Mexico was a hotbed. New Mexico has an especially favourable solar energy climate and relatively mild outdoor temperatures compared with most of Canada. A photo of the David Wright Home in Santa Fe, New Mexico, is shown in Figure 1. In Figure 2 a cross section of the house is shown.

Figure 1. South exposure of the David Wright House in Santa Fe, New Mexico

(Photo Credit: Design for a Limited Planet, Skurka and Naar, 1976)

Figure 2. Cross Section of the David Wright Mass and Glass House

( Credit: Design for a Limited Planet, Skurka and Naar, 1976)  read more... »

The importance of air tightness in building construction cannot be overstated. Very few factors affect energy performance in a cold climate more than air moving in and out of a building.

The Mill Creek Net Zero Home (MCNZ) has achieved an air tightness test result of 0.36 air changes per hour (ACH) at a pressure of 50 Pascal. In other words, when it’s really cold out, which creates a big pressure difference between the inside and the outside of a house, the 0.36 of the air in the MCNZH would leak out and be replaced with cold air over the course of an hour. It has the equivalent of a 13.8 square inch hole in it leaking air all of the time.

To put the number (0.36 ACH @ 50 Pa) into perspective, here are some average numbers:

Source: Biggs et. al. 1987

The 0.36 number is extremely small. In fact, the MCNZH is probably one of the most air tight wooden buildings in the world.  read more... »

Note from Conrad:This is a guest post by fellow Edmontonian Alice Harkness. Thanks for your excellent work Alice!

I experimented last winter with a very simple way of upgrading the insulation value of the beautiful original windows of my house: I added a third, Low-E glaze between the double hung window and the storm window.

Method

There is a 3/4 inch thick space inside the storm window created by the stop (the strip of wood that serves as the outside edge of the channel for the upper double hung window, and backing for the storm). Here’s what I did:  read more... »