Why do you need subfloor ventilation fans?
Tackle mould, mildew, condensation and poor air quality in your home with inline fans
Noticing a musty smell around your home or signs of damp beneath your floors? Poor subfloor ventilation might be the cause. Moisture and stagnant air in these areas can lead to mould, timber rot, and even attract pests. Subfloor ventilation fans offer a practical solution, helping circulate fresh air, reduce humidity, and keep the space under your home dry and healthy.
If there isn’t enough space to install a Solar Whiz subfloor ventilation fan, inline fans offer a great alternative for underfloor ventilation.
The 25 Watt high capacity inline fan is predominantly used for applications requiring large amounts of air to ventilate the sub floor area effectively, if you do not have adequate room (500mm+) to fit the Solar Whiz gable (in this case, wall mounted) mounted fan. The 25-watt inline fan has a diameter of 320mm and may be more appropriate for applications with limited space.
Solar Whiz recommends that sub floor ventilation fans be powered by solar panels for the most effective underfloor ventilation; however, all fans are available with a 12-volt power pack.
Besides sub floor ventilation fans, Solar Whiz inline fans can also be used for general ventilation, as well as heat extraction from rooms or greenhouses, etc. In most of these cases, the sub floor vents have to be installed in the wall and are powered by an external solar panel placed on the roof for optimum solar access.
If a Solar Whiz unit is too large—and you wish to extract air through the ceiling and out through the roof—our 150 mm fans may be combined with roof penetrations and roof cowls for this application to be successful.
Solar Whiz Sub Floor Ventilation fans that we offer are:
| Product Code | Product Name & Description | Power Source | Airflow (m³/h) |
|---|---|---|---|
| SW-AU-W-28 | Solar Whiz AU-W-28 – Wall Mounted (28W PV) | Solar | 2,000 |
| SW-AU-W-40 | Solar Whiz AU-W-40 – Wall Mounted (40W PV) | Solar | 2,500 |
| SW-AU-W-L-28 | Solar Whiz AU-W-L-28 – Wall Mounted with Louvre (28W PV) | Solar | 2,000 |
| SW-AU-W-L-40 | Solar Whiz AU-W-L-40 – Wall Mounted with Louvre (40W PV) | Solar | 2,500 |
| SUB1200 | 330mm Inline Fan – 300mm Adaptor (No PV) | Mains/Optional | 1,200 |
| SW-IF-1212C | 150mm Inline Fan – with 2 Flanges | Mains/Optional | 425 |
| SW-IF-2412C | 150mm Inline Fan – with 2 Flanges | Mains/Optional | 425 |
| SUB0700 | 220mm Subfloor Fan – Louvre Vent (10W PV) | Solar | 700 |
| SWW-368-15 | RAF-1600 Wall – 840mA with 15W PV | Solar | 1,000 |
| SWW-368-20 | RAF-2500 Wall – 1040mA with 20W PV | Solar | 1,200 |
| SWW-368-40 | RAF-4000 Wall – 1320mA with 40W PV | Solar | 2,100 |
These sub-floor fans are set up to draw air through subfloor vents set up around your subfloor. Depending on the home, we can offer a variety of installation methods to achieve the results you need. If you have a brick subfloor with little to no air intakes, we can map airflow through your subfloor space. We can duct, or we can even extract air through the roof via a roof-mounted Solar Whiz!
