Natural Ventilation Clause Samples
The Natural Ventilation clause defines requirements and standards for providing adequate airflow in a building or space without relying on mechanical systems. It typically specifies the minimum size and placement of windows, vents, or other openings to ensure sufficient fresh air exchange, and may outline conditions under which natural ventilation is considered acceptable. This clause ensures occupant comfort and health by promoting air quality and reducing reliance on energy-consuming ventilation systems.
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Natural Ventilation. Windows to all floor areas to provide total openable sections to a minimum of 5% of floor area, by top hung sashes.
Natural Ventilation. All of the south facing windows on the upper floor(s) of the building(s) shall be operable to allow natural ventilation of units/tenant spaces. Adequate natural ventilation must be demonstrated prior to issuance of occupancy for all units.
Natural Ventilation a. Every window, door, or other device with openings to the outdoor space, used for ventilation, shall be supplied with screens of not less than sixteen (16) meshes per inch.
b. The total openable window area in every habitable room shall be equal to at least forty five percent (45%) of the minimum window area as required above.
c. Every cellar window, soffit or roof vent, used or intended to be used for ventilation, and every other opening to a cellar, crawl space, or interior roof area, which might provide an entry for rodents or birds shall be supplied with a heavy wire screen of not larger than one-fourth inch (1/4") mesh or such device as will effectively prevent their entrance.
d. For natural ventilation, every bathroom or toilet compartment shall be provided with an opening or window with an area not less than one-twentieth (1/20) of the floor area of such room with a minimum of one and one-half (11/2) square feet and which shall be openable to the outside.
Natural Ventilation. Natural ventilation is to be provided in accordance with the arrangements shown on Drawing 611 Revision H, dated 02.10.19. The design of the natural ventilation and associated attenuation devices is to be further detailed and resolved as follows:
(a) Where attenuated natural ventilation is provided, apartments shall also be provided with opening windows with an effective open area sufficient to make-up the 5% area stated in the ADG guidelines. This additional open area is not required to be acoustically attenuated.
(b) The design of all attenuated natural ventilation systems is be in accordance with the City of Sydney’s draft Alternative Natural Ventilation of Apartments in Noisy Environments: Performance Pathway Guideline.
(c) The design of the attenuated natural ventilation is to ensure ease of access to the inside of any plenums or ducts for cleaning and maintenance.
(d) The design of the plenum is to include a selection of louvres, dampers, grilles, fly screens and similar to demonstrate the minimum effective open areas required for natural ventilation and achieved.
(e) All relevant architectural drawings listed at Condition (1) of Part B of this consent including all plans, internal and external elevations and sections, must be amended to show all visible physical components of the natural ventilation system design to satisfy (a) to (d) above. The components must be described in sufficient detail to demonstrate the final appearance, and include manufacturer details for proprietary products, including materials, colours, and finishes. Where non-standard components are used, detail drawings at 1:10 scale must be provided to demonstrate how they are integrated into building fabric.