The term 'Renewable Energy' refers to several energy sources that produce electricity or thermal energy without depleting resources. Renewable energy sources are generally defined as including wind, solar, water, biomass and earth, and energy from waste.

The term GreenHeat refers to four renewable energy technologies that can be applied to space heating and cooling in residential and commercial buildings.

GreenHeat technologies include:

  • earth energy systems (ground-coupled heat pumps / GeoExchange)
  • solar thermal water heaters
  • solar thermal air heaters
  • advanced biomass combusters.

Under the Kyoto Protocol, Canada must reduce its GHG emissions by approx 250 MT by 2012; greater reliance on GreenHeat technologies in commercial and residential space & water conditioning applications could reduce these emissions by up to 84 MT.

The Renewable Energy Deployment Initiative from Natural Resources Canada was established in 1997 to stimulate the demand for renewable energy technologies for space and water heating and cooling and has identified greenheat technologies as the .

The GreenHeat partnership involves suppliers from the four renewable energy space conditioning technologies, who want to help Canada meet its reduction targets for GHG emissions. This initiative will increase understanding of the significant role that renewable energies can provide in space heating, space cooling and water heating and, thereby, facilitate the transition to greater use of renewable energies in Canada.



Energy Use in Canada

Commercial Energy Use

In 1999, Canada consumed 984 petajoule (PJ) of energy in the commercial sector; 632 PJ (64%) was for energy consumed in thermal applications.


electricity
natural gas
propane
oil
1999 total (PJ)
space heating
41.3
367.3
30.2
52.2
491.0
space cooling
53.3
9.8
0
0
63.1
water heating
9.2
63.7
0
0
82.8
lights, plug load, all other
336.1
4.3
4.1
2.2
351.6
commercial total (PJ)
439.9
445.1
34.3
64.3
983.6

Commercial Energy Use (1999) - by application and fuel type (source: National Energy Use Database, 1999)


Residential Energy Use

During 1999, Canada's residential sector consumed 1,328 PJ, of which 770 PJ was for space heating, 296 PJ for water heating and 10 PJ for space cooling. Another 191 PJ was consumed for appliances and 60 PJ for lighting, or 81% of the total for thermal applications. For comparison, 1998 data show consumption patterns.


electricity
natural gas
propane
oil
wood Coal
1999 total (PJ)
space heating
128
409
10
110
107
2
766.0
space cooling
9
0
0
0
0
0
9
water heating
93
161
2
16
0
0
272
residential total (PJ)
230
570
12
126
107
2
1047

Residential Energy Use (1999) - by application and fuel type (source: National Energy Use Database, 1999)

In 1997, Canada's total GHG emission (CO2-equivalent) was 682 MT, with 31 MT from commercial (84% for space, 12% for water heating) and 53 MT from residential (79% for space, 21% for water heating) applications. (source: Canada's Emissions Outlook, 1999)

This 12% of national GHG emissions from space heating, space cooling and water heating could be reduced by greater reliance on greenheat technologies.



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