Print this page

Part 3.8.5 Ventilation

Explanatory information:

The requirements of this Part are to be read in conjunction with the air movement requirements in Open link in same pagePart 3.12.4. However, it should be noted that Open link in same pagePart 3.12.4 does not apply in all States and Territories.

Acceptable construction manual

3.8.5.0

(a)

Except for an exhaust fan from a Open link in same pagesanitary compartment, laundry or bathroom, Open link in same pagePerformance Requirement Open link in same pageP2.4.5 is satisfied for a mechanical ventilation system if it is installed in accordance with AS 1668.2.

(b)

An exhaust fan from a Open link in same pagesanitary compartment, laundry or bathroom must comply with the acceptable construction practice.

Acceptable construction practice

3.8.5.1 Application

Compliance with this acceptable construction practice satisfies Open link in same pagePerformance Requirement P2.4.5 for ventilation.

3.8.5.2 Ventilation requirements

Ventilation must be provided to a Open link in same pagehabitable room, Open link in same pagesanitary compartment, bathroom, shower room, laundry and any other room occupied by a person for any purpose by any of the following means:

(a)

Openings, Open link in same pagewindows, doors or other devices which can be opened—

(i)

with a ventilating area not less than 5% of the Open link in same pagefloor area of the room Open link in same pagerequired to be ventilated; and

(ii)

open to—

(A)

a suitably sized court, or space open to the sky; or

(B)

an open verandah, carport, or the like; or

(C)

an adjoining room in accordance with Open link in same page(b).

Explanatory information:

The ventilating area of a Open link in same pagewindow is measured as the size of the openable sash of the Open link in same pagewindow. This is the case regardless of the type of Open link in same pagewindow, i.e. whether it is an awning, casement or sliding Open link in same pagewindow and irrespective of the restrictions on the openable sash.

(b)

Natural ventilation to a room may come through a Open link in same pagewindow, opening, door or other device from an adjoining room (including an enclosed verandah) if—

(i)

the room to be ventilated or the adjoining room is not a Open link in same pagesanitary compartment; and

(ii)

the Open link in same pagewindow, opening, door or other device has a ventilating area of not less than 5% of the Open link in same pagefloor area of the room to be ventilated; and

(iii)

the adjoining room has a Open link in same pagewindow, opening, door or other device with a ventilating area of not less than 5% of the combined Open link in same pagefloor areas of both rooms; and

(iv)

the ventilating areas specified may be reduced as appropriate if direct natural ventilation is provided from another source.

(See Open link in same pageFigure 3.8.5.1)

Explanatory information:

3.8.5.2(b) permits a room's Open link in same pagerequired ventilation to be "borrowed" from an adjoining room, i.e. an adjoining room's ventilation can be used to help make up the total amount of ventilation Open link in same pagerequired.

The use of borrowed ventilation is acceptable if the provisions of Open link in same page3.8.5.2(b) are applied to the subject room and to the total area of each relevant room.

Figure 3.8.5.1

METHOD OF DETERMINING AREAS OF OPENINGS FOR BORROWED VENTILATION

Show Full Sized ImageFigure 3.8.5.1 METHOD OF DETERMINING AREAS OF OPENINGS FOR BORROWED VENTILATION
(c)

An exhaust fan or other means of mechanical ventilation may be used to ventilate a Open link in same pagesanitary compartment, laundry or bathroom, or where mechanical ventilation is provided in accordance with Open link in same page3.8.5.3(b), provided contaminated air exhausts—

(i)

directly to outside the building by way of ducts; or

(ii)

into a roof space that—

(A)

is adequately ventilated by open eaves, and/or roof vents; or

(B)

is covered by roof tiles without sarking or similar materials which would prevent venting through gaps between the tiles.

Explanatory information:

Except where mechanical ventilation is provided in accordance with Open link in same page3.8.5.3(b), Open link in same page3.8.5.2(c) only applies where an exhaust fan or other means of mechanical ventilation is provided as the sole means of ventilation for a Open link in same pagesanitary compartment, laundry or bathroom.

3.8.5.3 Location of sanitary compartments

Open link in same pageSanitary compartments must not open directly into a kitchen or pantry unless—

(a)

access is by an airlock, hallway or other room, (see Open link in same pageFigure 3.8.5.2); or

(b)

the Open link in same pagesanitary compartment is provided with an exhaust fan or other means of mechanical exhaust ventilation.

 

Figure 3.8.5.2

ACCEPTABLE LOCATION OF NON MECHANICALLY VENTILATED SANITARY COMPARTMENT

Show Full Sized ImageFigure 3.8.5.2 ACCEPTABLE LOCATION OF NON MECHANICALLY VENTILATED SANITARY COMPARTMENT