Can you put a timer on a bathroom fan?
Bath fan timer switches are a replacement for the light and fan switches that allow for automatic timing of the length of time the exhaust fan runs. After the person leaves and flips the switch off, the fan will run for the additional 10-minutes delay time, totaling 15 minutes of operation for that hour.
Can I run an extractor fan off lighting circuit?
Extractor fans in bathrooms are frequently powered from a lighting circuit. This is because many include a “run on” capability that is triggered by the operation of the light switch, and it is not permitted to have a device powered from two separate circuits.
How does timer work on extractor fan?
Fan timers operate the extractor fan in increments based on how long you have been in the room. If you take a long shower there will be more steam…the timer keeps the fan on for longer. Take a quick 5 minute shower and the timer remains on for a shorter period.
How do I adjust my extractor fan timer?
PIR Timer adjustment (Diagram 3) The time delay can be increased by firstly switching off the power to the fan, remove the front cover and insert a small screwdriver into the slot. Turning clockwise increases the time and turning anti-clockwise reduces the time.
Do extractor fans need an isolation switch?
You only need an isolator for the fan, if you want to be able to isolate the fan. There’s no law or Regulation stating you must have an isolator. In fact, unless you are wired directly to the incoming supply you have an isolator, the main switch or an MCB/fuse in you Consumer Unit.
Can a fan be on a lighting circuit?
In general, residential exhaust fans require very little power and combining with lights should not be a problem. This is acceptable. Many bathroom fans include lights with the intention of both being wired to one switch on the same circuit. They can also be wired separately to different switches.
Does extractor fan need timer?
Basic extractor fan models usually don’t have timers. They are often connected to the bathroom lights – when you turn the lights on, the fan operates. A fan with run-on timer, however, will stay on for some minutes after the light has been switched off, continuing to freshen the air after you’ve left the room.