Sub Floor Ventilation Sydney - Experience Fresh Air WIthout Sprays


Are you going through cans of air freshener like it’s going out of style, or burning candles all day long to try and cover up musty smells? Sub floor ventilation can fix the root cause of musty smells – usually underfloor damp. Fix the damp problems and you can breathe easy in your home with fresh, clean, healthy air, not sickly artificial fragrances.


Under floor damp problems are common with many Sydney homes. The great news is that under house ventilation or sub floor ventilation is an easy and cost effective way to manage that amp, preventing damp air and associated musty smell from entering your home.


Using powerful, yet energy-efficient and whisper-quiet fans, we remove trapped damp air from the sub floor, and replace it with fresh air through new or existing passive vents. With the damp air removed, musty smell entering the home is cut off at the source.


An alternative to sub floor ventilation if access is restrictive is forced air ventilation. This is also an excellent system to use in conjunction with sub floor ventilation to create a consistent environment of fresh, dry, healthy air throughout your home. Air is drawn into the roof space, where it is filtered, and heated if necessary, before being evenly distributed throughout the home. As well as fighting musty smells by distributing clean, dry air throughout the home, this can also reduce heating bills by harnessing radiant heat trapped in the roof space.



Fresh, healthy air should be given for every home, but for many homes, an unhealthy environment can lead to a range of serious health problems. Home ventilation can help you to keep your family from thriving.

Here’s some of our favourite reasons why home ventilation is the breath of fresh air your home needs:

Sub Floor Ventilation FAQs

What is Sub Floor Ventilation?  Is the allowable air movement underneath a timber floor. 

What does sub floor ventilation mean? A subfloor ventilation system extracts damp air from your home which intern allows dry fresh air to enter the areas under your floor. It is installed within your subfloor space and prevents excessive moisture from making its way inside your home.

What are sub floor vents?  They are typically installed in the external wall to allow airflow for the sub floor area. 

How does sub floor ventilation work? Sub floor fans remove damp trapped air from under your house and introduce fresh air through either existing or new passive vents. By cutting off the source of moisture, mould and mildew problems are stopped, with the added bonus of protecting your timber floors.


How to install sub floor ventilation: Fans can either be wall mounted or suspended from timer floors.  Ducting can be run into the different chambers of the sub floor to exhaust these areas. 


How much does sub floor ventilation cost?  Average between $2,500 – $4,500 depending on the size of the house and the volume of space that needs to be ventilated. 


How to improve sub floor ventilation?  The installation of mechanical fans to move the air rather than relying on wind to move air in the sub floor. 


How many sub floor vents do I need?  Depends on the volume of the area we are trying to ventilate. 


How does the sub floor ventilation ducting work? The ducting is run to target specific chambers in the sub floor. 


How do you calculate sub floor ventilation?  It’s calculated on the volume of space you are trying to ventilate. 


How do you improve your home sub floor ventilation?  The best way is to install mechanical fans to exhaust the sub floor area. 


What are the common issues where sub floor ventilation can help?  The ground under the house being damp causing musty smells in the house, mould, termite prevention and protecting your timber floors.

What are the requirements for sub floor ventilation?


Sub floor ventilation building regulations? You must have a certain amount of mm of open vent space per lineal metre of wall. 


Does sub floor ventilation work for timber floors?  Yes absolutely!


Does sub floor ventilation work with concrete slab? Only if you’re getting condensation on a suspended slab

Does sub floor ventilation work for brick homes? Yes absolutely!  The majority we work on are double brick homes that form chambers all over the sub floor. 


Does sub floor ventilation work for weatherboard homes?  Yes.  Usually if the sub floor perimeter has been enclosed then it would need ventilation.

Does sub floor ventilation work?  Yes, mechanical sub floor ventilation works because it creates the cross flow of air rather than just relying on wind and passive vents alone. 


What are the best sub floor ventilation options?  Ducted inline fans.  


Are there eco friendly sub floor ventilation options? Yes, there are lower wattage fans available. 


Is there solar powered sub floor ventilation options?  Yes, there are but they are limited in their capacity. 


Do I need subfloor ventilation?  Most houses have inadequate sub floor ventilation. 

Can I DIY install subfloor ventilation myself?  Yes, we do have some low voltage products that can be installed but we highly recommend a licenced professional because if they are not installed correctly they will not work efficiently. 


Sub Floor ventilation installers near me:  Xchange Air