Calculation Notes

The following list indicates the sources and assumptions used to calculate the Savings column of the Rebate list.

 

Household details

Size of average household: 2.47.  Source: Statistics Canada

Water, fuel and electricity (av. household expenditure, national): $2,256. Source: Statistics Canada

Water and sewage (av. household expenditure, national): $251. Source: Statistics Canada

Electricity (av. household expenditure, national): $1,162. Source: Statistics Canada

Natural gas (av. household expenditure, national): $655. Source: Statistics Canada

Other fuel (av. household expenditure, national): $188. Source: Statistics Canada

 

Heating: 90% of heating/cooling costs. Cooling: 10% of heating/cooling costs. (Assumption for the purposes of these calculations.)

 

The average Canadian home is 2,000 sq ft. Source: Canadian Geographic. (http://www.accessmylibrary.com/coms2/summary_0286-22165500_ITM)

 

 

APPLIANCES

 

Refrigerators use 11% of your household's total energy consumption. Source: Natural Resources Canada. (http://oee.nrcan.gc.ca/residential/personal/new-home-improvement/home-en...)

 

Energy Star-qualified dishwashers have efficiency levels at least 25% higher than the minimum regulated standard in Canada. Source: Natural Resources Canada. (http://oee.nrcan.gc.ca/residential/personal/appliances/dishwashers-tips.... http://oee.nrcan.gc.ca/residential/personal/appliances/improvements.cfm?...)

 

The efficiency of dishwashers has improved 62% in the last 10 years. Source: Natural Resources Canada. (http://oee.nrcan.gc.ca/residential/personal/appliances/improvements.cfm?...)

 

Energy Star clothes washers can provide a 50% decrease in energy use and a 35 to 50% decrease in water use.

http://oee.nrcan.gc.ca/residential/personal/appliances/improvements.cfm?...

 

 

ENERGY CONSUMPTION

 

Breakdown of home energy use: 60% heating, 4% lighting, 16% hot water, 20% household appliances. Source: Agence de l’efficacité énergétique, Quebec. (http://www.aee.gouv.qc.ca/en/my-home/renoclimat/les-avantages-du-program...)

 

 

HEATING AND COOLING

 

Energy Star qualified central air conditioning systems are about 20% more efficient than standard models. Source: Natural Resources Canada. (http://oee.nrcan.gc.ca/residential/personal/cooling-ventilation/central-...)

 

Energy Star room air conditioners use up to 40% less energy compared with older models.Source: Natural Resources Canada. (http://oee.nrcan.gc.ca/residential/business/manufacturers/cert-for-air-c...)

 

Energy Star [room air conditioners] must be at least 10% more efficient than Canada's minimum energy efficiency level. Source: Natural Resources Canada. (http://oee.nrcan.gc.ca/residential/business/manufacturers/cert-for-air-c...)

 

An ETS heating system can save 30% on your heating costs. Source: Natural Resources Canada. (http://oee.nrcan.gc.ca/publications/infosource/pub/home/Heating_With_Ele...)

 

A 20-year-old central heating appliance only offers about 70% maximum efficiency. New high-efficiency appliances offer up to 95% efficiency, a difference of 25% in energy savings.

Source: Gaz Metro, Quebec. (http://www.gazmetro.com/residentielactuel/efficaciteenergetique/en/HTML/...)

 

When used properly, Energy Star labelled thermostats can save you 10 to 15% on your heating bills. Source: Natural Resources Canada (http://oee.nrcan.gc.ca/residential/personal/thermostats-controls.cfm?attr=4)

 

Compared to standard furnaces, high efficiency gas furnaces may save up to 15% of the fuel needed to heat your home. Source: Minnesota Power. (http://www.mnpower.com/powerofone/one_home/hvac/furnace/index.htm)

 

Heating and cooling your home accounts for about 60% of your energy costs. Source: Ministry of Energy and Infrastructure, Ontario. (http://www.mei.gov.on.ca/en/energy/conservation/?page=home-energy-audit-...)

 

INSULATION

 

Improving the air sealing of your home can save 20% of home heating and cooling needs. Source: Natural Resources Canada. (http://www.nrcan-rncan.gc.ca/com/resoress/publications/cemcme/tipcon-eng...)

 

Insulation can save 10% of your home energy cost. Source: Energy Star U.S. (http://www.energystar.gov/index.cfm?c=home_sealing.hm_improvement_method...)

 

Upgrading insulation in your walls, basement and attic can reduce your energy bill by 30%. Source: Natural Resources Canada. (http://www.nrcan-rncan.gc.ca/com/resoress/publications/cemcme/tipcon-eng...)

 

 

LIGHTBULBS

 

Compact fluorescent lightbulbs use 75% less electricity than incandescent bulbs. Source: Source: Ministry of Energy and Infrastructure, Ontario. (http://www.mei.gov.on.ca/en/energy/conservation/?page=home-energy-audit-...)

 

 

WATER

 

Water consumption at home: 35% shower/bath; 30% toilet; 20% laundry; 10% kitchen/drinking; 5% cleaning. Source: Environment Canada. (http://www.ec.gc.ca/eau-water/default.asp?lang=En&n=F25C70EC-1#s3; http://www.ec.gc.ca/eau-water/default.asp?lang=En&n=11A8CA33-1)

 

A standard tap runs at 13.5 Lpm. Source: Environment Canada. (http://www.ec.gc.ca/eau-water/default.asp?lang=En&n=F25C70EC-1)

 

A low-flow showerhead can save $71.14 per year. Source: Environment Canada. (http://www.ec.gc.ca/eau-water/default.asp?lang=En&n=F25C70EC-1)

 

Toilets make up about a third of indoor water consumption. Source: Natural Resources Canada. (http://oee.nrcan.gc.ca/residential/personal/new-homes/water-conservation...)

 

Toilet savings by type of toilet: see http://www.ecosuperior.org/article/qualifying-for-the-toilet-rebate-200.asp.

 

An efficient toilet can yield a 50% reduction to your water/sewer bill if your municipality applies a sewer surcharge on your water bill. Source: Natural Resources Canada. (http://oee.nrcan.gc.ca/residential/personal/new-homes/water-conservation...)

 

Canadians use 343 L of water per person per day. Source: Natural Resources Canada. (http://atlas.nrcan.gc.ca/site/english/maps/freshwater/consumption/domest...)

 

Tankless(on demand) water heaters use 30% less energy than a tank water heater

Source: Energy Star U.S. (http://www.energystar.gov/index.cfm?fuseaction=find_a_product.showProduc...)

 

Energy Star qualified water heaters use at least 5% less energy than conventional models. Source: Natural Resources Canada. (http://oee.nrcan.gc.ca/residential/personal/energy-star-home-heating.cfm...)

 

Drainwater heat recovery (DWHR) systems can cut water heating costs by 30 to 40%. Source: The Home Depot Canada. (http://www.homedepot.ca/webapp/wcs/stores/servlet/CatalogSearchResultVie...)

 

Water heaters can account for more than 20% of a household’s total annual energy consumption. Source: Natural Resources Canada. (http://oee.nrcan.gc.ca/Publications/infosource/Pub/home/water_heater_fac...)

 

 

WINDOWS AND DOORS

 

Professionally installed Energy Star-qualified residential windows, doors and skylights can reduce your annual heating and cooling costs by up to 12%. Source: Natural Resources Canada. (http://oee.nrcan.gc.ca/residential/business/energystar/most-energy-effic...)

 

 

 

CALCULATIONS

 

Energy

Home energy cost = $2,005 (water, fuel and electricity – water, above)

 

Heating and cooling costs

Heating and cooling your home accounts for about 60% of your energy costs.

60% x $2005 = $1203

 

Heating is estimated at 90% of home energy costs, cooling is 10%.

Heating: 90% x $1,203 = $1,082.70

Cooling: 10% x $1,203 = 120.30

 

Water heating costs

Water heating can account for more than 20% of energy costs.

20% x $2,005 = $401

 

Savings with a tankless water heater

Tankless water heaters use 30% less energy.

30% x $401 = $120.30

 

Savings with a DWHR system

DWHR saves 30-40% of water heating costs 30% x $401 = $120.30

40% x $401 = $160.40

 

Savings with a greywater system

Assuming a a greywater system will satisfy all the water needs for toilets in an average Canadian home:

Toilets use 33% of a home's water.

Home water bills are $251 per year.

$251 x 33.3% = $83.58

 

Savings with effiient toilets

Cost of water: $1.26 per 1,000 L

Household: 2.47 people

Compared to an old 18 Lpf toilet:

6 Lpf toilet: saves 21,900 L of water per person per year x 2.47 people x $1.26/1,000L = $68.16

4.8 Lpf savings: saves 24,090 L of water per person per year x 2.47 people x $1.26/1,000L = $74.97

dual flush toilet savings: saves 26,718 L of water per person per year x 2.47 people x $1.26/1,000L = $83.15

 

Savings with air sealing

Air sealing can save 20% of heating and cooling bills.

20% x $1,203 = $240.60

 

Savings with insulation

Savings relating to insulation assume you upgrade all your insulation options (e.g., attic, wall, basement, floor, crawl space).

Insulation can save 10% of energy cost

10% x $2005 = $200.50

 

Savings with thermostats

A thermostat can save 10-15% on heating costs.

10% x $1,082 = $108.20

 

Savings with an ETS system

An ETS can save 30% on your heating costs.

30% x $1,082 = $324.60

 

Savings with Energy Star air conditioners

Energy Star central air conditioners are 20% more efficient than standard models.

20% x $120.30 = $24

 

Furnaces and boilers

Where energy efficiency ratings are indicated for the replacement heating appliance, savings calculations are compared with an old, 70% efficient appliance.

Assuming heating costs of $1,203 (see above), a 70% efficient unit captures the heat from $601 of fuel. To achieve the same heating value:

an 80% efficient unit would consume $1053 of fuel, for a savings of $150

an 85% efficient unit would consume $991 of fuel, for a savings of $212

a 90% efficient unit would consume $936 of fuel, for a savings of $267

a 92% efficient unit would consume $916 of fuel, for a savings of $287

a 94% efficient unit would consume $896 of fuel, for a savings of $307

For the purpose of illustration, a brushless DC motor is assumed to save an additional $100 per year. Savings depend on how consistently the blower fan is used throughout the year.

 

Windows, doors and skylights

Savings relating to windows, doors and skylights assume you replace all your windows, doors and skylights with Energy Star-qualified products rated for your climate zone.

 

Heating bill is $1082. Energy Star doors/windows save up to 12%.

12% x $1,082 = $129.84