Since this is a new installation not a replacement your bathroom will not have ducting.
How to install a bathroom vent out the roof.
And under while medium bath fans work well for bathooms 70 to 100 sq ft.
The 2nd bathroom vent drips on the floor and is ruining the ceiling.
Run a thick bead of tri polymer sealant along the underside of vent hood.
Letting the fan exhaust into an open attic will cause moisture buildup on the underside of the roof.
Here in the north we vent the bathroom exhaust through a bulkhead to the exterior wall the exhaust ducting is insulated and has a slight slope to the exterior wall to allow any condensation to escape we also install a 5 6 length of plywood at the eaves so the exhaust can t get into the attic space.
The 2 pipes one a 4 master and the other a 3 2nd do not go through the ceiling but into a common box that goes through the roof.
In all cases the ducting needs to conduct the exchaust to the building exterior and needs to terminate in an animal proof vent cover.
Roof vents 101 install for proper attic.
How to repair a bathroom fan.
Special bathroom fan roof vents with an internal damper that opens only when the fan is blowing will send moist air outdoors and keep cold air out of the house.
Installing a vent hood on the roof.
Pass the opposite end of the duct through the hole in roof.
This article describes routing bath exhaust fan duct upwards through an attic or roof space or downwards through a floor or crawl space.
The master bathroom and the 2nd bathroom vent through the roof and through the same opening.
Venting means that after air from the bathroom is drawn into the exhaust fan it is blown through a connected flexible duct and out of the house through a hole in the side of the house or roof.
Small bath fans provide adequate bathroom ventilation for 79 sq ft.
Bathroom vents roof for fans venting a mercial keepa roof jack ducted venting active ventilation piped exhaust vents for the bathroom and kitchen copper or master flow 6 in goose neck vent roof cap black 30 watt 1550 cfm black solar powered attic fan.
For bathroom over 100 sq ft use a large or exhaust fan to circulate the air.
Next use aviation snips to cut slits into the sheet metal sleeve.
The warm air will exhaust out the duct and enter back into the attic through the soffit vent or ridge vent.
Take the end of the duct with the connector fitting and attach it to bath vent fan.
If you have access to the attic the fan can vent either through a gable wall or roof.
Bend over the tabs then nail the tabs to the roof.