LISTEN...

According to Natural Resources Canada, there are three types of retrofits that can be done to existing buildings:

• Minor Energy Retrofit;
• Major Energy Retrofit; and...
• Deep Energy Retrofit.

A "Deep Energy Retrofit" may involve the following improvements and changes:

• Significantly improved energy efficiency, once a current or baseline energy use is defined for the building;
• A whole building approach that involves building envelope, energy consumption, heating and cooling, ventilation and occupant comfort. This will include something called an 'energy modelling';
• Increased air tightness to below 1 ACH (air change per hour) with the addition of mechanical ventilation (HRV or ERV);
• Increased and continuous insulation around the entire building;
• Replacement high efficiency windows and doors;
• Performance check or 'commissioning' of the building and its systems at close of construction or after the retrofit.