9.32.2.3. |
Non-Heating-Season Mechanical Ventilation
- Where a habitable room or space is not provided with natural ventilation as described in Article 9.32.2.2. and is mechanically cooled, its non-heating-season mechanical ventilation system shall
- have the capacity to exhaust air from inside the room or space, or to introduce outdoor air into that room or space, at a rate conforming with Table 9.32.2.3., or
- comply with Subsection 9.32.3.
- In applying Clause (1)(a),
- at least one bedroom in each dwelling unit shall be designated as the master bedroom,
- air change rates for any combined living/dining or family/dining space shall be determined as if the spaces were individual rooms,
- where a basement incorporates rooms of the types designated in Table 9.32.2.3., the assigned air change rate for each room shall be as specified for those types of rooms,
- basement areas used for other purposes that exceed 2/3 of the total basement floor area shall be assigned an air change rate of 10 L/s,
- basement areas used for other purposes that are 2/3 of the total basement floor area or less shall be assigned an air change rate of 5 L/s, and
- other habitable rooms, other than spaces intended solely for access, egress, storage, or service equipment, shall be assigned an air change rate of 5 L/s.
Table 9.32.2.3.
Air Change Rate
Forming Part of Clause 9.32.2.3.(1)(a)
- Where a habitable room or space is not provided with natural ventilation as described in Article 9.32.2.2. and is not mechanically cooled, the non-heating-season mechanical ventilation system shall have the capacity to exhaust indoor air from the room or space or to introduce outdoor air to that room or space at a rate of one air change per hour.
- A non-heating-season mechanical ventilation system shall be designed and installed in conformance with good practice such as that described in the ASHRAE Handbooks and Standards, the HRAI Digest, the Hydronics Institute Manuals and the SMACNA manuals.
|