Most new bathroom fans will have an adjustable bracket for you to install customized for the new bathroom vent fan.
How to replace bathroom fan no attic access.
How do you do this.
There will usually be a few screws connecting the fan housing to the ceiling joists.
You must cut the hole bigger to allow the protruding parts of the housing to make it through the cutout.
When you re installing the bathroom fan into a ceiling below another floor your new fan won t simply slide into a size for size opening.
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Replacing the exhaust fan without attic access.
An adjustable metal bracket may also be screwed into the ceiling joists and the fan housing secured to the bracket.