BC Home Magazine (BCH) published an article on net-zero energy homes in their June 2009 issue. It was an interview with architect Chris Mattock, who’s company (Habitat Design & Consulting) partnered with CMHC to bring net-zero energy homes to BC. Klondike Contracting supports every effort to green the environment so we wanted to share bits of this article with you in case you missed it:
BCH: What does net-zero energy mean?
MATTOCK: Net-zero energy means that annually a home produces as much engergy as it consumes – all energy that’s required is generated within the home. Net-zero carbon emissions means that you’re not burning fossil fuel or wood to live in an operate the home.
BCH: What is Harmony House?
MATTOCK: It will be a home in Burnaby, one of 12 zero-energy houses across Canada that CMHC has sponsored as part of its goal to have all houses build with this standar by year 2030. I organized a team of solar, water and indoor air quality, and construction experts to qualify for CMHC’s extensive technical requirements.
BCH: Will the house feature modern conveniences?
MATTOCK: It will function like any other house, with all of the most energy-efficient appliances, except instead of using a clothes dryer, which consumes a lot of electricity, it will have a drying closet, which is heated by solar thermal system…We will use daylight as much as possible (for lighting), which affects placement and height of windows and skylights. Indoor electric lighting will be laid out so that it complements natural daylight, with switches that automatically turn lights off when daylight is sufficient inside. Occupancy sensors will turn lights off when someone leaves a room.
BCH: What about insulation & windows?
MATTOCK: The building will be so well insulated that it needs only 20% of the heating requirements of a conventional house. It has a foot of insulation in walls using cellulose fibre made locally from post-consumer recycled newspapers, with 18″ of roof insulation.
There will be airtight wall, ceiling & floor barriers to reduce heat loss. It will have better indoor air quality than a conventional house because a ventilation system in every room will continuously take out stale air and bring in fresh outdoor air, filtering particles of pollen and pollution. Hot air escaping from laundry, bathrooms and kitchen will go through a hea recovery system, and 80% of this heat will go back into the homes’ heating. (Windows) will all be triple-glazed with two metal low-E coatings. They will have an R-6 insulation value whereas typical windows are R-2.
BCH: How are you using solar energy?
MATTOCK: Solar thermal collectors use the sun to heat water in a tank all year round for all electrical heating and hot water. Photovoltaic cells on the roof that convert sunlight into electricity will power appliances.
- Carol Crenna
(For more of this article please acquire a copy of BC Home June 2009)