the windsor 5 models
Each house received an energy audit and was modeled to determine various energy reduction scenarios.
We applied this base model to each home:
- Air sealing and insulation
- CFL and LED lights
- Low flow fixtures (shower head, toilet, aerators)
- ENERGY STAR refrigerator and front-loading washer
- Gas range and dryer
The energy audit indicated an *EGH for the five houses ranging from 18–55. For energy modelling purposes, Now House chose a median EGH of 35. However, the base model improvements are predicted to bring all houses up to a minimum of 58% energy reduction.
Outcomes and energy reductions are influenced by the number of occupants in the home and their awareness and actions relevant to energy use.
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Model 1
- Base Model +
- High efficiency hydronic forced air gas heating system
- High efficiency central A/C
- Heat Recovery Ventilator
Projected outcome:
- Energy reduction 62%
- GHG reduction 8 tonnes
- *EGH from 35 to 84
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Model 2
- Base Model +
- High efficiency forced air gas furnace
- High efficiency central A/C
- Heat Recovery Ventilator
- 2.1 kW solar photovoltaic system
Projected outcome:
- Energy reduction 63%
- GHG reduction 9.5 tonnes
- *EGH from 35 to 86
- Net zero energy cost
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Model 3
- Base Model +
- High efficiency hydronic forced air gas heating system
- High efficiency central A/C
- Heat Recovery Ventilator
- Solar thermal system
- 2.1 kW solar photovoltaic system
Projected outcome:
- Energy reduction 71%
- GHG reduction 10.7 tonnes
- *EGH from 35 to 91
- Net zero energy cost
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Model 4
- Base Model +
- High efficiency forced air gas furnace
- High efficiency central A/C
- Heat Recovery Ventilator
Projected outcome:
- Energy reduction 63%
- GHG reduction 8.1 tonnes
- *EGH from 35 to 84
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Model 5
- Base Model Only
Projected outcome:
- Energy reduction 58%
- GHG reduction 7.7 tonnes
- *EGH from 35 to 81
EGH: EnerGuide for Houses is a Canadian standard measurement for home energy efficiency. On a scale of 0–100, higher scores indicate higher efficiency.