THE NEW HEALTHY HOMES VENTILATION STANDARDS ARE:
Poor ventilation can cause mould and dampness, which can lead to health problems for tenants.
Window, door or skylight—all habitable rooms must have one of these that opens to the outside.
5% of room floor area—the minimum size of the opening.
Stay open on its own—i.e. does not need someone to hold it open
Extractor fan that vents to the outside—all kitchens and bathrooms.
– Kitchens: A minimum diameter of 150mm or an exhaust capacity of at least 50L/sec.
– Bathrooms: A minimum diameter of 120mm or an exhaust capacity of at least 25L/sec.
What if I already have an exhaust fan, but it doesn’t meet requirements?
The most important element of the new ventilation standards is that exhaust fans vent outside.
If you installed an exhaust fan before 1 July 2019 that vents outside, but doesn’t meet the other requirements, you can continue to use it.
However, when they stop working, you must repair it to good working order, or replace it with a fan that does meet all the requirements.
Ventilation systems that don’t comply
Positive pressure systems that draw from the roof cavity rather than outside.
Heat transfer systems.
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