Industry wide difficulties in meeting increasingly stringent building codes are the driving force behind Silvercote Solutions. Silvercote Solutions are designed to provide optimal overall energy performance for your building.
for the United States
https://www.energycodes.gov/compliance
https://energycode.pnl.gov/COMcheckWeb/
For Canada
http://www.nrc-cnrc.gc.ca/eng/publications/codes_centre/2011_national_energy_code_buildings.html
https://www.ashrae.org/resources–publications/bookstore/standard-90-1