Ventilation Review – Top 5 Must Know Tips Before Choosing A System

You might have noticed from the caliber of options here on that the granny flats of old have been replaced by stylish designer abodes that nearly all of would love to live in. With this new push towards luxury comfortable living comes a host of additional extras that you can throw into your new granny flat , often a ventilation systems is  to the top of the “options”  list.

The team here at Granny Flat Finder have done the research for you and taken the top 5 findings you need to make your home (or granny flat) ventilation system choice a smart one.

ventis ventilation review image

1. Sub floor vs Roof Ventilation  Your first cross roads is to decide weather to pursue a sub floor system or a roof ventilation system. The main difference is that sub floor ventilation systems tackle a specific problem such as rising damp or mould were as a roof ventilation system will direct filtered fresh air which can also be heated or cooled, as well as tackling mould and damp issues. Each installation is different however in our scope of the market we got the feel that a roof system would be a logical choice over sub floor, unless you had a specific damp issue. Hot tip: go with a vendor that provides BOTH sub floor & roof ventilation systems. You will find that going to a smaller provider that offers only one or the other is like asking your hairdresser if you need a haircut, the answer is always yes. PS thinking of building a granny flat yourself? – Use the Quick Check Tool to see if your property qualifies

Can I build a Granny Flat?


2. Positive Pressure Ventilation 

It seemed a great deal of the cheaper alternatives for ventilation were a glorified fan into the roof cavity or sub floor area. The other end of the spectrum are fully automated, energy efficient air exchange systems that distribute warm/cold air to the parts of the house or granny flat that need it based on the tine of day and stored heat in the roof.


3. Humidity  

This seemed to be the differentiation point that really separated the market.  Humidity reduction was a benefit thrown around by almost all of the roof ventilation providers, however we only came across one company that had an active humidity and moisture control system to make sure you didn’t wake up with a bleeding nose in the night from the air being completely dried out. The benefits from a carefully humidified home are obvious including the elimination  of mould, mildew and dustmites.


4. DIY vs Full installation 

Some options are DIY only and every provider we asked said that you buy the kit and self install. After undertaking a home review or two, unless you were are knowelgable in this area I would swing towards having an expert install your system. Vent placement, volume, insulation assessments and the like can all have a huge impact on the end result.


5. Health

This was a big one for us. Make sure you select a system with a medical grade filter which will reduce air pollution, pollen allergens and dust.


The final verdict

We suggest you undertake your own research while being  mindful of the above points. At the end of the day we settled for a Ventis Home Ventilation System as it was the only provider we came across with active humidity control. As well as being one of the largest operators in NSW and having a well established and credible track record the price when viewed in light of the additional benefits of what we saw as the most advance system made it a fairly easy choice. You can find them here



1 Comment

  1. Vicki taylor says:

    Hello ive got a lot of damp areas around my brick work and i dont no what to do can you come and have a look please

Leave a Reply

Your email address will not be published. Required fields are marked *