Need help replacing old bath ventilation with new one.?

Question

My current bath ventilation is circular so there is a circular hole in the ceiling about 15 inches in diameter. Inside the hole there is a metal housing that serves as the perimeter of the hole. The ducting hole is 3x3 inches wide but if i take out the metal housing then the pipe behind it is larger. I saw at Home Depot that most of the new vent systems are square in shape. How would i be able to fit a square shaped vent into the ceiling and how would i mount it inside? Should i take out the metal housing? And also the electrical wires are pre-wired like computer plugs are attached inside the computer. They are not like regular light fixture wires which you can twist together. How are current vent systems today wired? Do I need to rewire everything? Thank you for any help

thanks for all the answers. fortunately, i found out that i broken vent i have is still in production so i'm just gonna replace it with the same one. just one more question though. How do i disconnect the ducting hose from the metal housing? Its screwed in with screws and i can't reach around and unscrew them. Should i cut of the ducting hose? And when i attach the new unit to the hose how should i connect it together? I hope i can connect it without disconnecting the other side of the hose ducting attached to the top of the roof.

Answer 1

Hi

couple of things, first you should check the circular housing it maybe mounted inside a square housing or on a square one.

2nd take everything out of the ceiling and bring it to home depot, and see what you can get to match.
Most people do.

Other than that most fans are meant to be bracketed to ceiling joist (?) on side, the problem with new fans is that the old ones were smalller and that they have lights and fans which requires more wiring than i care to do.

you maybe able to take the fan off the housing of one unit and put it on another.

Other than that call a handy man. electricians dont do plaster, carpenters dont do electricity and your old fan will start looking better and better

Answer 2

I believe Home Depot and other hardware stores sell adaptors from 3" and 4" circular ducting to 4" X 10" rectangular ducting.

If not you can usually get them from a heating supply outlet.

Do the following after you have purchased the new fan.

Turn off the circuit at the fuse or breaker panel.

There should be a screw holding a plate (the receptacle for the fan is often mounted in the same plate) inside the housing.

Remove the screw and the plate should come away. The electrical connection is behind it.

Disconnect and tape the wires separately.

The housing can be removed to allow you to install a new one.

Disconnect the cable from the old housing.

Install the adaptor. You may have to shorten the existing duct to accomodate the adaptor. Do not shorten by the length of the adaptor - you require about 2 to 3 inches to connect to the housing. You must have continuous ducting from housing to the outside of your structure. If you do not, the moisture build-up can and will cause rot, mould, etc.

Connect the cable to the new housing using the proper cable connector.

Mount the new housing into the ceiling so the edge is flush with the ceiling finish.

Make the electrical connections. White to White, Black to Black, Bare wire to the screw that is coloured green.

Use the proper wire nuts (marrette connectors).

Mount the fan into the housing and plug it into the receptacle provided.

You should have this inspected

Link to the Electrical Safety authority

http://www.esainspection.net/Contractors/oa_001.php

Good Luck

Answer 3

Last weekend I helped my son install a new vent fan in his house. It was the same circumstance as you described. An existing round hole with the housing. We removed the old fan, and the housing. As space didn't allow for cutting a new square hole, we positioned the new square fan assembly in the attic centered over the round hole and attached it to the 2by that held the old system. We didn't feel the need to add extra vent duct and simply let it exhaust into the attic. We used "wire nuts" to attach the wires together. ( MAKE SURE THE POWER IS OFF BEFORE DOING THIS) The wiring should be the same a a light fixture with a white and black wire. As the new square cover in the bathroom ceiling was too close to the light fixture to let us use the clips that came with the new unit, we simply put a small bead of "Liquid Nails" around the edge of the cover and held it in place for about 5 or 6 minutes. It worked great, and looks good as well Good luck with your project.

Answer 4

They do make ducts that go from round to square. maybe look in heat ducts. But they use them on jobs i work for this.
As for the wiring i'd probably cut yhe plug off and wire it up like it was. Only a suggestion there.

Answer 5

Durgo air admittance valve, shall we air into gadget so waste water can pass away, floor floor WC would be linked direct to empty won't have vent geared up, if it fairly is likewise filling you will have a broken drain, have you ever regarded interior the get right of entry to chamber (manhole) to work out if it fairly is partly blocked, in case you project approximately Durgo valve see in case you may get soil pipe extented by way of roof , There are traps on the industry which will stop the noise yet get outdoors drains examined first. How old is abode ?

Answer 6

the new ones ,are much better , but need new wires,installed.
take out the old ,metal housing ,and install some sheet rock . cut out for the new shape,
if you have never ed wired before leave it to a pro,
cost about $45 to install