A-10.2.1.1.(3) Alternatives to Prescribed Insulation Requirements. Computer modelling can provide options to the requirements of Table 10.2.1.1.A by considering factors other than insulation that impact energy efficiency. These include items such as higher fenestration efficiency, more efficient Heating, Ventilating, Air Conditioning (HVAC) systems and reduced envelope air leakage from what is required or is common practice.
The Natural Resources Canada EnerGuide Rating System program uses Hot2000 Version 10 for modelling. It can be downloaded at: http://www.sbc.nrcan.gc.ca/software_and_tools/hot2000_e.asp
The Ministry of Energy, Mines and Petroleum Resources can provide assistance in determining options to the prescriptive insulation requirements of Table 10.2.1.1.A.