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Does a humidistat extractor fan need a switched live?
No switch at all will enable it to work when the light is switched on and then run on with the timer AND to work independently through the humidistat.
What is extractor fan with humidistat?
Extractor fans with humidity sensors automatically come on whilst showering. Sensors within a humidity extractor fan helps to respond to the exact ventilation requirements of a room.
What is the difference between switched live and permanent live?
A 2-wire system includes two wires – Live and Switched Live. The brown wire is Live (also know as permanent live), this brings the live supply to the switch. The blue wire is known as the Switched Live and takes power to the light. Switched Live is only live when the switch is on (this is where it gets its name from).
What size cable do I need for an extractor fan?
The minimum cable size for fans is 1.0mm. Anything larger than 1.5mm is unnecessary and will prove more difficult to work with. 2 core and earth are required for the timer fan.
How strong should a bathroom fan be?
In general, choose a fan that can move at least 1 CFM per square foot of room. So, for an 80 square foot bathroom, select an 80 CFM fan. For bathrooms 50 square feet and smaller, it’s recommended you purchase a bath fan designed for small rooms. In other words, choose under 79 CFM bath fans.
How does a humidistat work on a fan?
A humidistat is a sensor within a certain module in the fan that detects the level of humidity in the air, and then switches ON or OFF the fan. The humidistat can be set and adjusted as needed, so that when there’s a lot of humidity in the air, the fan will automatically be ON until the humidity is eliminated.
What should trigger level be for humidistat extractor fan?
A humidity trigger level of about 65% is a good starting point. If you find the fan is on too much, turn the trigger level up. Conversely, if the fan does not seem to be coming on even when you think the humidity is high, turn the trigger level down. Instructions for this should also be included in the Commissioning Notice.
How does a humidity sensor work on a fan?
Instead of being linked to your light switch and a timer, humidity sensing units have a small humidity sensor built into the housing of the fan unit which constantly monitors the air humidity. So when it detects the humidity level increase above a preset level the fan switches on.
What should humidity be on diynot extractor fan?
Since it states 60 to 90% adjustable one would expect the adjustment to be reasonable liner through the range. However likely trail and error is best way to set. How to adjust the humidity setting is in the user manual. Did you look there?