Condensation Management
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Frequently Asked Questions
Why were the new NCC Condensation Management Provisions brought in?
To protect both people and buildings from the problem off too much moisture
Can I still vent exhaust fans or kitchen rangehoods into the roof space instead of venting externally?
No. This is no longer an option under the updated NCC 2022 provisions
Should I vent out exhaust fans and rangehoods via the roof, eave, wall or fascia?
All locations have advantages and disadvantages. Most homes have multiple appliances requiring external ventilation and a combination will likely be required in most homes
What are the Key Implications of NCC 2022 10.802?
- Exhaust fans, rangehoods and vented clothes dryers are required to be vented externally to outside air
- Exhaust fans must have a minimum flow rate requirement of up to 40L/s
- Some exhaust fans must be connected to the light switch with a 10 minute run-on timer
What are the key implications of NCC 2022 10.8.3?
- Some homes in certain climate areas require additional venting at the eave
- Homes requiring venting at the eave with a pitch of <10 degrees also require additional roof venting