Natural Resources Canada (NRCan) recently introduced its Zoning Duct Design Guide to help contractors and engineers design forced air duct systems.
The guide provides detailed design steps and is a companion to NRCan’s Zoning Decision Guide for Builders.
Developed by NRCan’s CanmetENERGY-Ottawa Housing Research and Local Energy Efficiency Partnerships (LEEP) groups with content from several leading duct design experts, it is available for download on the NRCan website at the following links:
English: https://www.nrcan.gc.ca/energy/efficiency/housing/research/20277
French: https://www.rncan.gc.ca/energie/efficacite/habitation/recherche/20278