How To Install a Bath Exhaust Fan

How To Install a Bath Exhaust Fan

Is this what you do after every shower? Then
you need a new exhaust fan. And since we’re renovating everything else
in this bathroom, there’s no better time for us to replace the old one. The latest fans are so cool. Some have lights,
some have heaters, and for the ultimate fight against mold, some have automatic humidity
sensors like this one. It turns on when it senses too much moisture. When you’re picking out a new fan for your
bathroom, there are a few things you need to check out before you buy. Pay attention
to sones and CFMS. Sones will tell you how loud a fan is —the
higher the number the louder the fan. 2 is considered quiet. And CFMs—which means cubic
feet per minute—is a measure of airflow. The larger the room, the larger the CFM number.
For a powder room, 50 to 60 CFM should be enough. For a medium-size bath, 70 to 90,
and for a large master bath go with 100-plus CFM. Also, if you want to make life a little easier,
make sure your new fan will fit where your old one already is. Remember, you can always
pull out your old one and take it with you to the store. So to do that, first cover the work area with
a drop cloth. Then turn the power off to the old fan, pop off the cover, and double check
that the electric is off. Next, remove the motor, and take out the mounting screws. Slide
the housing to the side and disconnect the vent duct. Then, pull down the housing, disconnect
the wires, and remove it. Once you have your new fan, be sure to read
the directions. Now, if your new one is not the exact size of your old fan, it’s ok. You
can make some adjustments.If the new fan is smaller, you can patch the ceiling. You can
see how patch drywall at If the fan is too big for the ceiling, hold
it up to the hole, mark it, and cut with a drywall knife. With the hole squared away you can start hooking
up the new fan. Set the duct connector in the ceiling, hold
the housing up and slide the connector into the slots. With the housing level and perpendicular
with the joists, drive screws into the joists. Now head up to the attic. If you need to, you can lay a board across
the joists so you can kneel down. Attach the brackets to the joists. Then connect the brackets
to the body with a screw. And then attach the ducts to the connector with HVAC tape. On to the wiring. First take off the junction
box cover. Then connect the house wires to the fan wires. Replace the junction box cover, and turn on
the power. If it sounds loud like something’s not right, turn off the power and make sure
everything’s mounted securely in place. When it’s all good, add the mounting springs
and push the cover into place. Another project off the list. For more videos
from this bath remodel series, visit

Comments (80)

  1. Much more helpful then Home Depot's

  2. How do you mount the exhaust housing if you don't have an attic or any crawl space??

  3. Couldn't agree more with previous comment. Home Depot's tutorial is absolutely horrible. Plus they even have the audacity to use a completely finished luxurious bathroom as their stage. People don't have bathrooms like that if they are looking to YouTube for their home repair. Thank you Lowe's for the good "How To".

  4. HAHAHA, nearly identical to Home Depot's video…ย 

  5. Wont the duct produce condensation in winter without insulation?ย 

  6. What if our old 50 cfm fan upgrade to a 100 cfm requires a larger diameter duct? Is it ok to use the existing smaller duct?

  7. Hi Lowe's. .. how do I install the cover grill at the end? It's the same model that you installed on the video.Everything else is done. Thank You..

  8. I need to install a new bathroom vent in a master bath that doesn't have one,,is there a video on that.

  9. Hi, you go to the attic to fix the wiring, what do I do for a condo?

  10. Where to get these in Egypt

  11. very helpful thanks. but i need more help on the wiring part of the job.

  12. How do you get to the mounting screws removed at 1:20? Thanks!

  13. But you don't need to go in the attic to install new fan. You should be able to connect hose and wiring before installing in place.

  14. @ 2:04 he damaged the roof.

  15. I have heat lamps currently in the bathroom, do you think the current wiring will work with the new ventilation fan?

  16. nice and simple …… not.! All of the "printed in China instructions" are based on installation with access from above. They do not work for the harder "from below" installation. You have to rip out the ceiling and fit in sheet rock around the installed fan. Not sure why the Utiltech fan only had a partial slide bracket on one side. Might be easier to build a 2 x 2 or 2 x 4 frame for the fan to sit in. The box store "simple" is never simple and staff seldom have the experience on the install.

  17. Thanks, nicely done!

  18. I still am having trouble with the cover my son put my fan in and I don't think it is level

  19. Can I use a light socket adapter to power my new exhaust fan? (only 15watts exhaust fan + 12 watts led light.)

  20. WHAT IF I ONLY NEED TO replace the fan and not the housing etc, how do I get a replacement fan only??

  21. what if i dont have an attic

  22. How do you know what switch from the electrical box is for the bathroom exhaust fan or the bathroom ?

  23. 2:13 My attic is also surgically clean like this one. LOL.

  24. call an,electrician

  25. what if there is no access to the attic to take off the mounting screw for the motor housing?

  26. they make it look so easy in that brand new house with an attic you can damn near stand in…

  27. But, I can't get up to my attic!

  28. life hack: fog on mirror? no problem. use a hair dryer

  29. What about the 20+ inches of blown-in cellulose insulation above the exhaust fan (for those of us that don't live in California, Florida, or Texas)? Won't it fall through the hole when you take your old exhaust fan housing out?

  30. I actually like exhaust fans that look like recessed can lights

  31. better than home Depot

  32. what about the light and fan switch?

  33. What's the guy's name? You know, for research ๐Ÿ˜‚๐Ÿ˜‚๐Ÿ‘Œ

  34. Is it okay to buy higher cfm fans than the required cfm.

  35. the inf is not complete

  36. well done videos, right to the point! ๐Ÿ™‚

  37. Installing and replacing are two different things.

  38. BEWARE! These instructions are probably not applicable to the majority of retrofits. The video shows 2×6 ceiling joists with very wide spacing (greater than 20 inches by my estimate). If you insert the fan into the ceiling through the opening, you will not be able to insert the metal brackets (that nail into the studs) into the fan housing, as the brackets will not clear the studs. My advice, insert some 2×4 cross bracing and screw fan into that

  39. that's ridiculous pull everything through hook it up push it in place screw in to side of joist

  40. Very informative video here!

  41. All the nice music and talking nicely with a smile make it look as though its a job a kid can do. In reality its is NOT EASY as it sounds.

  42. My exhaust fan is vented directly up and out the roof. How does that affect installation?

  43. Decent video, but really not a very realistic scenario for a homeowner.

  44. Good produc but indonesia is not your product

  45. Oh, you just remove it. This made it very clear. Just remove it. Nothing more. remove it.

  46. Excellent video with one (hopefully) minor error; Not sure why you chose to animate the actually wiring (2:26). Clearly the computer techie that made the wiring animation does not know which way wire nuts screw on and off…. anyone turning them in the same direction shown in the animation may end up with a short/fire as they are clearly being UNscrewed during installation.

    Hopefully anyone following this guide will turn them more then the quarter-turn shown and notice them not getting tight and reverse the direction… Righty tighty, lefty loosy ๐Ÿ™‚

  47. Itโ€™s how to read instructions in the manual, not how to follow directions !You are not driving ! Fix that video!

  48. 0:00 he put his breath on that mirror

  49. This video was so straightforward and descriptive, thank you for making and posting it!

  50. And i cant stop at your face lol

  51. @2:08 – Someone "forgot" to insulate that area.

  52. Compadres boarded up the crawl space where the fan was screwed in, so I gotta cut my way through to even pull the old one out. Gracias, fellas! Additionally, "No cutting" and "Easy fit" is false advertising for the unit I got, considering that you AT LEAST have to access the crawl space above (if it even exists). I guess I should consider myself lucky that the unit that failed was on top floor. But what when the units on main floor or basement go bad? For that alone the product gets a 1 star.
    Compadres also used a 3" pipe, so it took better part of a Saturday.

  53. Can you install these into a wall. Or is there s certain type to buy for a wall exhaust fan?

  54. 2:10 I wouldnโ€™t put weight on that.

  55. So does it have directions on how to wire it up if you donโ€™t already have one? Iโ€™m wondering if you can tap into power form the feed side of the light switch.

  56. Very good video. Lots of great tip. What about the vapour barrier, do they exist in the states? I do not see them in any videos.

  57. What about the vapor barrier that is not present in the attic space? This is an unrealistic representation of the task to change out a fan. There must be a vapor barrier installed, and then the insulation is replaced. Secondly, the attic space is typically a dusty mess with insulation everywhere. Use a dust mask rated for asbestos, white suite and tape your wrists and ankles. CAUTION – THERE MAY BE ASBESTOS IN YOUR ATTIC. Get it tested to understand the materials used in your home.

  58. in washington, a label shall be affixed to the control that reads "Whole House Ventilation (see operating instructions)." do you have any ideas how to do that?

  59. How about showing the harder method- when you don't have an attic?

  60. "How to Replace a Bath Exhaust Fan"

  61. And the Worst video of The Year goes to….

  62. I have never had a fan in my small bathroom, only a window to open…and now I am dealing with attic condensation. I was advised to install a fan, however, I am understanding that the exhaust should NEVER be routed to the attic but needs to be vented outside the house, otherwise unnecessary humidity will be a problem (once again). Also, the fan will need to be insulated to make a tight seal within the attic. I don't think this installation is as simple as it sounds! This video also states in the disclaimer that the information is "general."

  63. Do you need to airseal around the housing on the attic side? Or even the housing itself if it has small holes (and they usually do)?

  64. i live in a apartment, how do i get to the attic ? haha

  65. I like the window/mounted extractor fans. It's the ones seen in China. They're more powerful

  66. This is not how to install an exhaust fan, it is how to REPLACE an exhaust fan.

  67. What the..? So where does the air go

  68. where do we get the extension brackets? and what are they specifically called?

  69. You should've installed a axial exhaust fan on the window. Just like the ones in China.

  70. GLASES IS MOST IMPORNAt if you dont have glasses you dont no how to replace any stuff in your house,pfffffff crepyyyyyy

  71. The electrical, no problem. Cutting/patching drywall, no problem. But those "mounting springs" located on the cover, which pinch together to attach it to the unit, is literally the hardest part. Lol

  72. So.. how does the cover attach. Could not see the springs. My NuTone seems to be different than anything I have seen yet.

  73. Ummm…there's got to be an easier way to get this installed without going into the attic. The guy removed it without going up there. I can't get to it via the attic…its only like 3ft tall where the vent is located.

  74. Poorly named video. This is REPLACING a bathroom fan. Not installing. Lame.

  75. Notice when they say take out the mounting screws they forgot to tell you to crawl up in the attic ๐Ÿ™„. Oh and the housing and wires oh yeah they come out that easy. ๐Ÿ˜‰


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