Onboard Motor Calculator
Offboard Motor Calculator

Air Movement Calculator





*Area measuring includes kitchen/dining/lounge areas if open plan.

Sirius offer multiple motor options, as every home and install is different. To get the best solution for your home, and style of cooking, Sirius two types of Rangeood. On board and Off board.

Historically, rangehoods have been noisy, messy, underpowered extractors that weren’t much to look at. Sirius has changed that by giving customers the option of both onboard and off-board rangehoods, that are quiet, powerful and designed by a leading Italian architectural designer, Giacomo Fava. Winner of multiple design awards worldwide from New York to Singapore. Because of this, you can now have a rangehood that is the centerpiece of your kitchen, boasting performance and stunning aesthetics.
Onboard motors are now designed with high-efficiency green motor technology, making them super-efficient and quiet. Paired with Sirius ducting, the combination is easy to install. This easy to install solution has undermount, canopy, and even ceiling cassette designs as options.
To work out the power you need in your home, enter the room size and let us guide you to the most suitable extraction you need for your home and cooking style.

Points to remember about rangehoods!

  1. 1.   Opening such as door and windows create air currents that can work against the pulling power of your hood.
  2. 2.   Naturally, a motor finds it easier to pull air rather than push the air, so you will need a little more power if you choose an on-board motor over and off-board. This is why the extraction tends to be a bit stronger on the on-board.
  3. 3.   This ‘pulling’ the air mentioned is also why you should always install an off-board motor a minimum of two meters away for the rangehood to get the most extraction out of your hood, with an exception to downdraft-style hoods. See install guide for greater explanation.
  4. 4.   On-board motors are usually more cost-effective to install.
  5. 5.   Off-board motors are a great option when you have a living area very near to the cooking area and want to reduce any noise transferring while high power cooking.
  6. 6.   You should only need level 4 power option while wok frying, smoky cooking or you may have burnt something and want to clear the air from the room.
  7. 7.   Always remember the correct height and positioning of your hood over the cooking hob will greatly affect the performance! See the user manual of the hood you have selected.

DISCLAIMER

The calculator on this page is provided as a general guide, designed to help you select an exhaust fan which may be suitable for your needs.

By simply inputting into the calculator the dimensions of your room, and the type of room/application for the fan, the calculator will provide you with a suggested general capacity range in cubic metres per hour (m3/hr) to help narrow down your exhaust fan options.

Important Notice: This information is provided as a guide only. It does not constitute specific advice. Suggestions are provided based on the theoretical capacity required for a given room, based on room dimensions, and suggested rate of air changes per hour.

It does not provide nor recommend a specific ventilation solution for a particular area. Information in relation to suggested rate of air changes per hour is based on current Australian Building Codes, and is provided as a general guide in relation to what could be considered common installation situations and reasonable expectations.

It should be noted that besides just the dimensions of the room, there are several other factors that should also be taken into account, as they can have an effect on the final outcome in terms of achieving a desired result.

These factors include, but are not limited to:

  • Materials in the room – materials such as ceramic tiles, windows, mirrors can result in higher levels of steam
  • Existing levels of dampness or excessive humidity
  • Is there sufficient air flow into the room?
  • Is there good cross-flow ventilation to allow the fan to draw towards the vent?
  • Is the fan ducted? Ducting a fan will generally have an effect on the overall capacity of the fan – the longer the ducting, and the more bends in the ducting, the less capacity the fan has
  • Is it the correct type of fan motor for the application?
  • Expectation of the client in relation to how much and how quickly the steam will be removed.
  • Our staff would be pleased to help you select a suitable solution for your particular application.