To Access Ontario Energy Rebates, You’ll Need an Energy Evaluation
What Is It?
During the energy evaluation, we will be using prescribed methods to determine the amount of energy in Gigajoules (GJ) that the house uses in a year. This GJ rating is on a scale from 0 (which is a house that would create as much energy as it uses) to an unlimited number on the high end. The higher the number, the more energy the house uses.
There is no ‘ideal’ number, as there are so many factors that come into play, including the age of the house, the climate zone, construction methods and heating system. The report will show you the energy that your house uses compared to a new house of the same size and climate zone.
The GJ rating that is created for your house is likely not the same as the combined energy that your house uses. The rating assumes a standard number of occupants and energy use patterns. This allows for the comparison of energy usage across houses so that the house is rated and not the operation of the house by the occupants.
These values are:
- Two adults and one child, at home 50% of the time;
- Hot water use of 178 – 199 L/day, variable depending on incoming ground water temperature;
- Thermostat settings of 21°C for daytime heating, 18°C for nighttime heating and 25°C for cooling; and
- Lighting, appliance and other electrical loads of 19.5 kWh/day
What To Expect
While on site we will:
- Take measurements of the house to determine the area and heated volume of the home.
- Determine the type, direction and size of the windows and doors.
- Identify the type of construction of the house and its insulation levels in the basement, main walls and attic.
- Identify the type and rated efficiency of the heating, cooling and water heating systems
- Identify the types of mechanical ventilation (exhaust fans and air exchangers)
- Perform a Infiltrometer (blower door test)
- The blower door test will identity how often the air in the house is refreshed. To be healthy, a house should change air once every 3 hours
- The blower door test will identify the Equivalent Leakage Area. ELA is measured as if we put all the holes in one spot; approximately how big would that hole be?
- It will also Identify areas of air leakage
- Create an energy efficiency roadmap – how to make your house more energy efficient and applicable rebates.
When the evaluation is complete, we will email two reports to you:
The first report is the Homeowner Information Sheet, which describes our findings with regards to the building envelope and its systems. It will provide the gigajoule rating for your house as well as a comparative rating of your house if it were to be built to today’s building code.
The second report is the Renovation Upgrade Report. This report will list any upgrades that you could consider for your home, based on our discussions with you and our experience. This report will also list the amount of energy savings that you could attain for each individual upgrade, so that you can plan your upgrades according to energy savings. Finally, this report will have a rating for the house if you were to complete all of the recommended upgrades. The rating is based on the house and its installed systems. Essentially, if the item is attached to the house, it is included in the rating.
Not included in the rating are lights, appliances, swimming pools, hot tubs, garages (heated or unheated) and outbuildings.