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QuietAir FAQs

You can find some of the more commonly asked questions about the Airflow QuietAir below. If your question is not answered here, please contact us at your earliest convenience.

Performance Questions

Neither. The QuietAir range of fans are all fitted with a thermal overload cut out which is an added safety feature which is resettable once the unit has cooled down.

The reason that this cut out has come into operation could be for a number of reasons with the most common being: the fan has become clogged up with dirt and dust or that the impeller has become unbalanced through the build up of dirt and dust.

Yes you can. You can purchase a 2 speed switch (Part No 9041315) which would enable this fan to run on 2 speeds.

The fan is one of the most quiet fans on the market with a dB(A) rating of just 25.

The timer models (QT100T/QT120T/QT150T)have a unique feature called Room Refresh which will refresh the room; removing stale air. This unique feature can be set up to refresh your room every 8, 12 or 24 hours. It can be switched off by setting the dip switch accordingly. Please refer to the instruction manual for all settings available.

QuietAir QT100T/ QT120T Instruction Manual

QuietAir QT150T Instruction Manual

The QuietAir fan range only runs at 5W at 20.8 l/sec. So, for example, on a standard domestic tariff of 0.19 kW/hr and being used for 2 hours a day, the running cost of this fan would be £0.057 per month, which would amount to £0.68 per year. Making the QuietAir one of the most cost effective fans on the market.

The QuietAir fans are fitted with a ball bearing motor with a life expectency of 40,000 hours.

Wiring Questions

The QT100T fan is a timer module and would require both a permanent Live to the L terminal and a switched live to the No. 1 terminal to enable all the functions.

You would need to change the jumper setting within the fan to enable the second speed operation. Please refer to the instruction manual of your model for the setting of this jumper.

QuietAir QT100T/ QT120T Instruction Manual

QuietAir QT150T Instruction Manual

A dip switch is located within the fan and depending on the configuration of the settings on this gives all different options, i.e. 6/10/15/20 minutes overrun. Please refer to your instruction manual for the configuration of this switch.

QuietAir QT100T/ QT120T Instruction Manual

QuietAir QT150T Instruction Manual

The QT100 range of fans do not require an Earth due to its double-insulated motor.

We have two different dip switch settings based around when the product was purchased.

For QuietAir fans purchased before January 2013, follow these instructions.

For QuietAir fans purchased after January 2013, follow these instructions.

The fans have an operation test mode for 1 minute when voltage is first applied to the fan to enable the factory settings. In this case, the delayed start and timer function is deactivated. Once the test mode is complete the fan will function with all functions as per set up.

The QT100B fan does only require Live and Neutral but the wiring needs to be neutral to N and Switched Live to No 1 for the slow speed or No2 for high speed operation.

Installation Questions

Yes, all of the QuietAir fan range can be ceiling mounted with another unique feature being that it does not matter what way around the fan is fitted with regards to cable entry, as the front cover will fit in any of the 4 positions so that the front logo is as it should be when walking into a room.

The QuietAir range of fans are IP45 Rated. The IP stands for Ingress Protection, and with a rating of 45, is protected against water jets from any direction. So this fan can be safely fitted within a shower enclosure providing proper wiring guidelines are adhered to by a qualified electrician. A RCD needs to also be fitted as laid down by the latest IEE wiring guidelines.

The performance of the QuietAir range of fans doesn't drop thanks to its unique impeller design, which when used in conjunction with its flow straightener gives full performance of up to 12m of rigid ducting with a maximum of 11 90o bends.

The outlet size is 98mm so a standard 100mm hole would be required.

The PIR sensor has a monitoring range of 5m maximum with an angle span of 100o horizontal and 82o vertical.

No - dimmer switches have a voltage regulator that transmits a digital signal which most mains voltage PCBs components also have. These 2 signals would interfere with each other.