scope:

This Standard applies to detached, Semidetached, duplex, and row housing. With semidetached or row housing units, the assumption is made that there is no significant air leakage between adjacent units at the pressure differencesxreated by the operation of the ventilation systems, and that the interior area of the building envelope, for the purposes of Clause 6.1, does not therefore include common separations.

This Standard is not intended for multiple dwelling units of the apartment type, although the ventilation air provisions of Table 1 may be applicable.

This Standard is intended to apply to houses incorporating any type of heating system, whether forced air, electric baseboard, hydronic, or radiant. The implementation of the requirements in this Standard will require different approaches for the particular heating system being used.

This Clause allows for the possibility that ventilation systems conforming to this Standard may not be mandated, and that certain packaged ventilators might therefore be installed in a dwelling without a ventilation system. It also applies to the installation of ventilation equipment beyond that required to meet the minimum ventilation air requirements of this Standard.

All of the relevant clauses of Clause 7 on Equipment Requirements, and Clause 8 on Installation Requirements, apply to such ventilation equipment components. General requirements for all packaged ventilators are given in Clauses 7.7 and 8.13. Specific requirements are given in Clauses 7.7.4 and 8.13.3(d) for heat-recovery ventilators, in Clause 8.13.3 for exhaust air heat recovery devices, in Clause 8.13.4 for kitchen exhaust devices, in Clause 8.13.5 for range hoods and range-top fans, and in Clause 8.13.6 for bathroom fans.

Clause 8.13.2 specifies house depressurization requirements for all packaged ventilators installed in addition to, or in lieu of, ventilation systems conforming to the ventilation air requirements of this Standard.