Installing a Bathroom Extractor Fan
You have come to a decision to install a bathroom extractor fan in your bathroom, and you are ready to go. The first step is to decide where you would like to position it and mark the center point of the unit on the ceiling. Now, using a nice long bit, drill through the ceiling, and push a long nail or dowel through the hole, so that you can find the hole easily when you go up into the roof space or attic.
In the roof space you will need to find a suitable position for your bathroom extractor fan so that it fits in between the timbers close to the hole you drilled. This hole will be enlarged from below to accommodate the intake port of the bathroom extractor fan. You can do so by going down to the bathroom again and marking out the inside dimensions of the intake port on the ceiling and cutting it out with a jigsaw.
You may need someone to help you by supporting the piece of ceiling you are cutting, so that it doesnít break away. Make sure your measurements are accurate and square in relation to the room. Remember to protect yourself from the falling debris with a dust mask and protective eye wear.
Back in the ceiling, you will see on the extractor fan housing there should be an outlet port. If you are ducting your bathroom extractor fan, then onto this goes an elbow that you connect with foil duct tape. Bear in mind that the slower and wider the elbow turn, the more efficient the airflow will be. The elbow should point in the direction of the hole in the wall or roof where the outlet is going.
When the bathroom extractor is in position, you can connect the ducting to the elbow. To get the unit into position, first attach a cable connector and then place the unitís intake port down over the hole you cut in the ceiling. Using the brackets supplied with the bathroom extractor fan unit, fasten the unit to the beams with screws. Make sure the power is off at all times when you are working with the electrics. Donít make the final live connection until everything else has been done. Your electric cable should go through the connector and the screw tightened to hold it in its place.
Normally the wiring and connecting up instructions come with the bathroom extractor fan unit. If you have any doubts about connecting up the electrics, donít risk it. Rather enlist the services of an electrician and be safe. If you do it yourself, you will have to take out the grill down in the bathroom and unscrew the motor from its housing. Remove the motor from below. Open up the electrical outlet and connect up the electrical cable, which you had fastened to the connector earlier. Match the wires, color with color, making sure the wiring is safely earthed and no bare sections of wires are left un-insulated. Close up the outlet. The motor can now be plugged into the outlet and lifted back into its place in its housing, and secured. Attach the grill to the housing and fastening it snug up against the ceiling.
Ducting the Bathroom Extractor Fan
In all except the driest climates your bathroom extractor fan should be ducted if the outlet is in the roof space. If you have an attic, you will need to duct it whatever the climate. You need to attach the ducting to the elbow you put in previously, and seal it with foil duct tape.
Depending on the design of your home and the position of the bathroom in it you will normally run your ducting through a hole in the wall or a hole in the roof. You will have already decided more or less where you are going to cut your exit hole, and the elbow should be pointing in that direction. The exit should be as close as possible to the bathroom extractor fan. The rule of thumb is to have the duct run in as straight a line as possible. This will give you optimum airflow. .
As with the ceiling hole you drill a marker hole through the wall from the inside between the wall studs, so that you can locate the place easily from outside. Cut a hole from outside as per diameter so that the wall cap fits tightly. Now you can install the wall cap, sealing it with silicone caulking. Inside, you can connect up your ducting with foil duct tape. If your exit is through the roof, you will use a special roof cap instead, which is protected against rain.
Bathroom Exhaust Fans
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