page contents
Home » Sub Floor Ventilation

Solar Sub Floor Ventilation

How do you get rid of subfloor dampness and mould?

Chances are you haven’t checked your subfloor space in a few years. If you have problems with mould, moisture and condensation anywhere in your home, it might be a result of poor subfloor ventilation!

 

Why Subfloor Ventilation Is Important

Subfloor areas are prone to dampness, poor ventilation, and musty conditions, especially in older homes or those built on stumps.

 

Sub floor ventilation fans

A subfloor (or underfloor) is liable to get damp and musty if left unchecked. Without proper sub floor ventilation, you risk:

  • Mould, mildew or fungal growth,
  • Rising damp & condensation problems,
  • Rotting floorboards & foundation stumps,
  • Damage to internal walls & paintwork,
  • A perfect breeding ground for white ants, termites & borers!

High moisture levels can lead to irreversible damage to the structure of your house. Repairing your subfloor space is no cheap fix—so why risk having problems in the first place? If you have high humidity and poor indoor air quality, you’re risking the health of the home occupants.

Solar Whiz offers powerful solar sub-floor ventilation. We’re serious about protecting and safeguarding your home’s subfloor. Don’t risk your greatest investment becoming an expensive repair job, no home subfloor should be a problem.

How Solar Whiz Sub Floor Ventilation Works

Solar Whiz offers a wide variety of solar-powered subfloor ventilation fans, each suited to extracting different volumes of air. Every home is different—some large, some small, some with lots of subfloor space, and some with none at all!

We offer a variety of subfloor ventilation systems, each of different sizes and ventilation capacities. We understand that subfloor vents need to cater to a wide variety of homes. In the scenario where one of our fans doesn’t fit, we can also make use of our other inline fans to tailor a subfloor vent solution just for you!

Our subfloor fans are connected to roof (or even wall-mounted) Solar PV cells. These ensure that your subfloor ventilation system runs when you need it most, and can even run in low-light conditions like overcast weather! If a Solar-style setup doesn’t suit, we can even set up a 12-volt power pack plugged into a 240-volt power point for underfloor ventilation all day long.

Methods for Sub Floor Ventilation

Sub floor vents help keep your sub floor healthy.

1) Bifurcation

By using a split ducting system, we can create multiple air intakes through your subfloor. This allows the subfloor extractor to draw air from multiple spaces of your subfloor, creating cross-ventilation that covers almost the entire floor space. This is one of our most popular installation methods.

 

 

Underfloor ventilation helps you control your sub floor condensation.

2) Single Duct Extraction

A single duct allows you to channel air to specific locations of the house. If a single subfloor vent is installed, it will allow you to draw air from specific regions of the subfloor.

 

 

 

Sub floor vents with Solar Whiz are reliable, and powerful.

3) Roof-Mounted

If subfloor space is too limited, we can also offer roof-mounted subfloor ventilation. By ducting a Solar Whiz roof ventilator down to your subfloor, we can offer powerful extraction that won’t be affected by limited subfloor space.

 

 

Under floor ventilation can save your home from expensive restumping.

4) Push/Pull Method

If you have segmented subfloor space, or would like to map & channel airflow through your entire subfloor space, the push/pull method allows you to move air through the subfloor from one end to the other.

 

 

Why Choose Solar Whiz Subfloor Ventilation:

Removes subfloor dampness and condensation

Solar Whiz subfloor ventilation removes trapped moisture by improving airflow under your home. This helps prevent dampness, mould growth, musty smells, and long-term structural damage caused by high humidity levels.

Helps prevent mould & rot

Proper subfloor ventilation keeps moisture levels under control, helping to stop mould from growing and protecting timber from rotting, safeguarding both your health and your home’s integrity.

Discourages pest like termites

Damp, humid subfloors attract termites, borers, and rodents. Solar Whiz helps dry out these areas, making them far less inviting for pests looking for the perfect environment to nest.

Improves indoor air quality

By replacing stale, moist air from the subfloor with fresher, drier air, Solar Whiz helps reduce allergens, pollutants, and dust—creating a healthier environment, especially for those with asthma or respiratory sensitivities.

Increases the lifespan of flooring and foundations

Excessive moisture can warp timber floors and weaken foundations. Solar Whiz subfloor ventilation helps prevent structural damage to your home. By reducing moisture levels, it protects against termites, timber rot, decay, and other issues caused by damp conditions. Maintaining a dry subfloor can significantly extend the lifespan of your flooring and foundations, saving you money on repairs and maintenance over time.

Runs on solar power—no electricity bills

Powered by the sun, Solar Whiz is an eco-friendly and cost-effective solution.

Optional mains-power backup for 24/7 operation

Need subfloor ventilation at night? Solar Whiz systems can include a hybrid power option to keep your subfloor fans running around the clock.

Simple, low-maintenance installation

Solar Whiz subfloor ventilation systems are easy to install, require minimal maintenance, and can be configured to suit a wide range of homes—even those with limited access or space constraints.

Enhances home comfort

Solar Whiz sub floor ventilation can also enhance the overall comfort of your home. By reducing moisture and improving air quality, it helps to create a more pleasant living environment that is less prone to mould growth, dampness, odours, and other issues.

Reduces the risk of health problems

Dampness and mould growth in the subfloor area can lead to a range of health problems such as allergies, asthma, and respiratory infections. By reducing moisture levels and improving air quality, Solar Whiz subfloor ventilation can help to lower the risk of these health issues.

Enhances property value

Installing Solar Whiz sub floor ventilation can enhance the value of your property. Potential buyers will appreciate the benefits of having a well-ventilated and dry subfloor area, which will help prevent future problems and lower the cost of maintenance and repairs.

More effective than powered ventilation

Solar-powered subfloor systems like Solar Whiz operate consistently during the day, right when moisture buildup is most likely. Unlike traditional powered systems, they don’t rely on timers or mains electricity and can be paired with hybrid options for extended runtime. This makes them a smarter, more efficient, and cost-effective choice for managing subfloor dampness.

What else do I need to know about Sub Floor Ventilation?

If you want your subfloor system to operate even during low-light or night-time conditions, a constant current module is the perfect solution. This optional add-on allows your Solar Whiz fan to draw power from mains electricity when solar energy isn’t available, ensuring continuous protection against moisture.

With Solar Whiz, you get a set-and-forget system that actively guards against subfloor dampness, mould, and structural damage.

 

Get Started Today

Keep your home healthy from the ground up with Solar Whiz sub-floor ventilation.
Contact us for a free consultation.
Or download our brochure to learn more.

 

Solar Whiz offers powerful sub floor vents.

Frequently Asked Questions

What is sub floor ventilation?

Subfloor ventilation is the process of removing moist air from your home’s subfloor and replacing it with new, dry air. This is accomplished by adding a number of air vents to the outer subfloor of your home.

Does sub floor ventilation work?

Properly installed subfloor ventilation systems can effectively mitigate rising damp and mould growth. By reducing moisture levels in the underfloor area, these systems help prevent the progression of these issues.

Do I need subfloor ventilation?

Enclosed sub-floor spaces require sub-floor ventilation. Relative humidity in the air increases when moisture evaporates from the soil and is absorbed by the atmosphere above. The moisture content of the flooring and frame members will subsequently increase as a result of this.

How long does it take to run subfloor ventilation?

We’ve discovered that running the fan for about 4 hours a day is enough to keep things ventilated properly. The optimum time to run the fan is typically during the day, when the air is warm and dry.

How many vents should a subfloor have?

A suspended timber-framed floor needs to have ventilation under it. There should be a minimum of five air changes every hour (and double that for wet subfloor spaces). For every square metre of floor area, a clear opening area of 3500 mm2 (100 x 35 mm) should be supplied.