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Solar Whiz Residential — FAQ’s

Frequently Asked Questions List

The Solar Whiz system is relatively straight-forward to install and run. However, we understand that there are some questions about how it operates, and about the system itself.

We’ve compiled a list of the most commonly asked questions in hopes that you’ll find the answer you need.

Calculating Needs

1) What size Solar Whiz do I need?

Solar Whiz unit has a recommendation on what size homes they ventilate best. For example, smaller units (SW-RAF700 or the SW-RAF-R-1200) better suit sheds or smaller units. Larger units (SW-RAF1700 or the SW-RAF2300) are what we will usually quote for your standard Australian residential dwelling or freestanding home.

The recommendations for ventilating standard pitched homes are as follows and are based on 10 years experience in the Australian roof ventilation market:

  • SW-RAF700 – Suitable for spaces up to 80m2
  • SW-RAF-R-1200 – Suitable for spaces up to 120m2
  • SW-RAF-R-1700 – Suitable for spaces up to 180m2
  • SW-RAF-R-2300 – Suitable for spaces up and above to 250m2

Many of our competitors recommend less capacity. Theoretically, these lower airflow capacity requirements are correct but don’t actually result in the desired outcome – because of severe restrictions for the necessary replacement air.

At GES we also carry out our own testing, whilst it appears that our competitors rely on the manufacturer’s specifications. We would encourage anyone considering a competitor to ask them about the test procedure to verify the airflow.

2) Where can I purchase Solar Whiz products?

GES has an extensive network of dealers throughout Australia. Please check our website for our dealer list or contact us to link you up with your nearest dealer and/or installer.

Click here for our dealer list page.

Airflow Capacity

How many litres per second can a RAF unit move?

Solar Whiz Unit

Cubic metres/hour (m³/h)

Litres/second (L/s)
















3) How many Whirlybirds is each Solar Whiz unit equivalent to?

The different Solar Whiz roof ventilation fan units are capable of moving 10-30 times the amount of air that a Whirlybird moves.

  • The SW-RAF700, which extracts 700m3/h. Capable of moving between 6 to 8 whirlybirds worth of air.
  • The SW-RAF-R-1200, which extracts 1,200m3/h. Capable of moving between 8 to 10 whirlybirds worth of air.
  • The SW-RAF-R-1700, which extracts 1,700m3/h. Capable of moving between 10 to 15 whirlybirds worth of air.
  • The SW-RAF-R-2300, which extracts 2,300m3/h. Capable of moving between 20 to 30 whirlybirds worth of air.

This all depends on the type of Whirlybird, as well. An average Whirlybird moves around 100m3/h, and all our measurements and quotes derive from this measurement. The ‘average’ whirlybird would be equivalent to a stock-standard unit purchased from your local hardware warehouse.

4) Can you over-ventilate your roof space?

The short answer is no—you can’t “over-ventilate” your roof space.

The long answer is that there’s no limit to how much airflow you can have in your roof space. Provided you have enough roof ventilation airflow, you’ll be continuously replacing the warm air in your roof space, flushing it out with cool replacement air.

You can definitely under-ventilate, however we will advise you of the best possible solution to get you the results you need.

5) What is the difference between an intake and exhaust vent?

The characteristics between both air intakes and exhaust vents are as follows:

Air intakes are typically eave vents or other form of under-eaves, or unsealed openings for metal roofing.

Exhaust vents classify all forms of roof-based ventilators that are typically installed on the upper ⅓rd of a roof. Examples include whirlybirds, Solar Whiz ventilators, or ridge cap vents.

Solar Whiz can provide eave vents with your purchase. Ask us what type of air intake should complement your Solar Whiz installation!

6) Why is passive ventilation not enough?

Solar Whiz offers both a Fixed Temperature Thermostat, and an Adjustable Temperature Thermostat.

  • The Fixed Temperature Thermostat will prevent a unit from operating unless it is 30°C degrees or more inside the space that the thermostat is installed in.
  • The Adjustable Temperature Thermostat allows the user to set the temperature at which the unit runs. This enables the unit to introduce warmer air if it’s already too cold in the morning, or to turn it off entirely throughout winter.

Thermostats pair perfectly with Night Operations Kits (NOPs) to enable the user to have complete control over when the unit runs, even during the night.

7) Do Solar Whiz ventilators still work in the rain?

Our Solar Whiz roof ventilators are supplied with high-quality solar PV panels that still supply power even in low-light conditions.

It has to be said that the low-light conditions will reduce the capacity at which the Solar Whiz unit can ventilate. However, even if it was running at half capacity, the Solar Whiz is still ventilating more than a standard whirlybird.

Using our Night Operations Kit with your Solar Whiz installation bypasses low-light conditions by “topping up” electricity from mains power to ensure 100% efficiency all day, every day.

Here’s a video of one of our older Solar Whiz units running in low-light rainy conditions!

8) Why are eave vents important?

Eave vents are important in our Solar Whiz installations, as they provide access to the coolest replacement air. This is an important principle for flushing out trapped air responsible for 25% to 35% of the heat in your home.

Without eave vents or any other form of air intake, a roof ventilator unit will struggle to extract air. It’s simply trying to pull air out of a vacuum, otherwise.

9) Why are ceiling vents important?

Ceiling vents are ideal for double-storey homes where the heat can accumulate not only in your roof, but in your second storey. Heat naturally rises and can radiate outwards in confined spaces.

A ceiling vent allows a roof-mounted Solar Whiz to pull fresh air through the home, and flush the heat out of your second storey AND roof space.


10) How noisy is the fan of the Solar Whiz ventilators?

The Solar Whiz units all operate below 60 decibels. The measurements for each roof ventilator are as follows:

  • SW-RAF700 – <40 Decibels (dBA)
  • SW-RAF-R-1200 – <40 Decibels (dBA)
  • SW-RAF-R-1700 – <45 Decibels (dBA)
  • SW-RAF-R-2300 – <60 Decibels (dBA)
11) What are the Solar Whiz gable units for?

The Solar Whiz Gable units are ideal for homes with pitched roofs that are too steep to conventionally install a Solar Whiz, or if a customer wishes a minimalist look for their roof.

  • SW-RAF700G – Suitable for spaces up to 80m2
  • SW-RAF900G – Suitable for spaces up to 120m2
  • SW-RAF1400G – Suitable for spaces up to 180m2
  • SW-RAF2100G – Suitable for spaces up and above to 250m2

The gable units are equal to their roof-mounted counterparts in airflow ratings.

Alternatively, the gable units make for powerful sub floor ventilation fans, enabling those looking to address their subfloor issues (mould, mildew, dampness).

Contact us for a professional recommendation on addressing your subfloor ventilation needs.


12) Can the Solar Whiz ventilators be used at night?

Solar Whiz ventilators can be pared with a Night Operations Kit. This system (Also referred to as a “constant current module” or simply, “NOPs”) is a relay that tops up the remaining power needed to run a unit at full power.

In principle, when it is sundown the NOPs system will top up until the sun has completely set, or if it is incredibly low light conditions.

NOPs run from a 24-volt power supply connected to a power point in your roof space. This can be installed with the help of an electrician.

13) Does the Solar Whiz turn off in winter? Can I install a thermostat?

The Solar Whiz runs whenever there is active sunlight reaching the solar panel. This means that yes, the Solar Whiz will run in winter.

Solar Whiz does however offer simple-to-install thermostats to help the user control when, and how their unit operates:

  • The Fixed Temperature Thermostat will prevent a unit from operating unless it is 30°C degrees or more inside the space that the thermostat is installed in.
  • The Adjustable Temperature Thermostat allows the user to set the temperature at which the unit runs. This enables the unit to introduce warmer air if it’s already too cold in the morning, or to turn it off entirely throughout winter.

Using these in conjunction with NOPS gives the user complete control over their Solar Whiz installation.

14) How do I prevent heat from escaping throughout winter, even after installing a thermostat?


It should be noted that the percentage of heat that is lost through the ventilator itself is very minimal. You are far more likely to have heat radiate out through your metal, or tiled roof if it’s uninsulated.

While the thermostats ensure that the unit runs only when you need it to, Solar Whiz ceiling vents are designed to be able to close. They have internal butterfly-style flaps that can be made to shut.

If you have concerns about heat escaping through the Solar Whiz unit itself, there are solutions. It’s entirely possible to cut out a piece of foam that you can manually insert into the throat of the unit to ‘suffocate’ the ventilator. This prevents heat from radiating through it without damaging the unit itself.


15) How difficult is it to install a Solar Whiz?

Installing a Solar Whiz is relatively straight-forward for any competent handyman with the right tools!

We thoroughly recommend that you allow one of our authorised installers to handle the installation our units. This will ensure that you recieve the best possible results according to our installation principles.

Read our installation instructions or watch our installation videos here!

16) How does roof line design affect a ventilation system?

Every home is different, but Solar Whiz has taken strides to offer accessories that cater to different styles or pitches of roofing.

  • For steep or cathedral-style roofing, we offer extension collars or gable fans to help a Solar Whiz unit be installed without intersecting into the roof itself.
  • For flat or lower pitch roofing, we recommend installing more eave vents to enable even airflow and replacement air.

Given that every home is different, we recommend giving is a call to get some specific advice about what style of installation would best accompany your roof.

Call us on 1300 609 994

17) What if I have a cathedral ceiling or flat roof?

If you’re looking to use Solar Whiz to ventilate your home rather than your roof space, we can help. For limited roof space access, we install butterfly-style vents that can be open and closed as needed.

18) How are the gable fans installed?

The gable units are functionally identical to their roof-mounted counterparts:

  • SW-RAF700G – Suitable for spaces up to 80m2
  • SW-RAF900G – Suitable for spaces up to 120m2
  • SW-RAF1400G – Suitable for spaces up to 180m2
  • SW-RAF2100G – Suitable for spaces up and above to 250m2

The gable units are equal to their roof-mounted counterparts in airflow ratings.

The gable units are installed on the apex of the wall that connects to your roof space, allowing for direct replacement air crossflow.

19) Can I install Solar Whiz ventilators on my shed/workshop etc.?

The Solar Whiz RAF700 and RAF-R-1200 are ideal for all kinds of small spaces, such as:

  • Granny flats
  • Studio flats
  • Garages
  • Workshops
  • Trailers
  • Cabins
  • Sheds

These small-yet-powerful units are perfect for tin or metal sheds that can accumulate large amounts of heat very quickly in the summer.


20) What are your product warranties?

A Solar Whiz warranty offers a substantial timeframe to cover our products & components. Solar Whiz RAF (Real Air Flow) units have is as follows:

  • Solar Whiz PV Panels – 10 year warranty
  • Solar Whiz Components – 2 year warranty.

A full breakdown of warranty information, terms & conditions can be located on our GES site or detailed over the phone.

21) How do I obtain warranty service?

If you need to make a warranty claim on our range of ventilators, please contact us on the following options:

Free Call: 1300 609 994


We’ll get in touch with you to figure out the issue with your system, and ask you to fill out a warranty claim. This way we can catalogue the issue and send you a replacement part if the issue is covered by our warranty.

22) Can I purchase replacement parts if my warranty expires?

Solar Whiz offers a wide range of spare parts that can be purchased if something happens that cannot be covered by the warranty.

These parts are reasonably priced and can be dispatched all across Australia.

Please contact us if you’re interested in purchasing a replacement part via the following methods:

Free Call: 1300 609 994



23) Where are Solar Whiz products produced?

Solar Whiz is designed, developed and manufactured in Australia by Global Eco & Environmental Solutions (GES Pty Ltd).

Find a dealer near you!

Commercial ventilation

Solar Light Whiz


Global Eco & Environmental Solutions

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