ARCHIVED - 9.32.3.13.(2)

This information has been archived because it is outdated and no longer relevant.

Archived Content

Information identified as archived on the Web is for reference, research or recordkeeping purposes. It has not been altered or updated after the date of archiving. Web pages that are archived on the Web are not subject to the Government of Canada Web Standards. As per the Communications Policy of the Government of Canada, you can request alternate formats on the "Contact Us" page.

9.32.3.13.(2)


Objective	OH1 Indoor Conditions
Attribution	[F40,F50,F52,F53-OH1.1]
Application	Application 1: Minimum vertical distance from the bottom of air intake openings to: finished ground, or any nearer and lower permanent horizontal surface. This applies to self-contained heating-season mechanical ventilation systems serving single dwelling units with 5 or fewer bedrooms that are supplied with electrical power and a heating system, in buildings to which: Part 9 applies [see Sentence 1.3.3.3.(1) of Division A for application of Part 9], or Part 6 applies [see Sentence 1.3.3.2.(1) of Division A for application of Part 6 and Sentence 6.2.2.1.(3)]. Exceptions: except as stated in Sentence 9.32.3.1.(1), which applies to heating-season mechanical ventilation systems designed to comply with CAN/CSA-F326-M.
	Top of Page
Intent	Intent 1: To limit the probability of insufficient vertical clearance, which could lead to: the blockage of intake openings by accumulated snow, or the ingress of dust or grass clippings. This is to limit the probability of an inadequate supply of makeup air, which could lead to excessive negative pressure in dwelling units, which could lead to: the ingress of soil gases (such as methane and radon), the spillage of combustion products from fuel-burning appliances that are susceptible to spillage, or moisture ingress from the ground, which could lead to the generation of pollutants from biological growth or from materials that become unstable on wetting. This is to limit the probability of negative effects on the air quality of indoor spaces, which could lead to harm to persons.
	Top of Page