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Discussion Forum

“bottom” dryer vent

| Posted in General Discussion on July 25, 2004 02:53am

New to your group.

I have a dryer that will vent horizontal and below the dryer. 

I need to cut a hole through the subfloor. Is there a “standard” size that will work or do I just “hack” away?

Our “old” ’23 house has 2 x 4 framing and the vent is 4″ SO I can’t go through the bottom plate without something sticking out of a wall.

 

 

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  1. FastEddie1 | Jul 25, 2004 02:56am | #1

    Welcome.

    I don't understand the problem.  I thought all dryer outlets were out the back of the machine, and just above the floor line.  I would cut a hole about 4-1/4" and insert a rigid pipe, and caulk both sides.

    Whenever you are asked if you can do a job, tell'em "Certainly, I can!"  Then get busy and find out how to do it.  T. Roosevelt

    1. User avater
      Sphere | Jul 25, 2004 03:46am | #2

      I'm thinkin he wants to ell down below the subfloor..4'' pipe 3.5'' bottom plate..he's screwed. 

      Spheramid Enterprises Architectural Woodworks

      Repairs, Remodeling, Restorations. 

    2. rasconc | Jul 25, 2004 04:05am | #4

      Maytag dryers have a knockout in the side and the bottom to redirect the outlet.  I used a 4 1/5 or so holesaw on a holehawg to drill through my hardwood and subfloors.  I got bounced off the wall a couple of times.  I ran mine down and also did inlaws out the side of dryer.

    3. DanH | Jul 25, 2004 04:15am | #6

      No, I was just vacuuming out our Maytag, and I noted that it has KOs for an exit through the bottom or out the left side.

      The problem with exit in any direction is getting the blind connection made. Not sure how you'd do that on the bottom.

      The standard pipe is 4" nominal, but I don't know what typical actual dimensions are. I'd think at least a 4.5" hole is needed.

  2. DANL | Jul 25, 2004 03:59am | #3

    Not sure I understand problem either, but can you pull the dryer into the room slightly and make the 4-1/4" hole through the floor deck (in front of the wall and thus avoiding the plate)? I've seen vertical pipes that the dryer vent tee's into to go up when a dryer is in a basement; could you reverse it and have it go down instead of up?

  3. rasconc | Jul 25, 2004 04:13am | #5

    You can buy a periscope that has the round inlet and outlet but about 5 X 2 rectangular pipe.  Lowes/HD should have them.  If that helps I think I have a box in the garage and will get you the info if you wish.

  4. SEBDESN | Jul 25, 2004 04:18am | #7

    The bottom vent  goes down about 1 1/2" or so from the back of the machine(to the front, under the machine). No plates to go thru, just the floor...Get the instalation drawings for the machine and go from there....otta be fun to get it hooked up to the vent...Just did a side vent, and was a breeze, much better than the back crappp...

    1. stonefever | Jul 25, 2004 06:55am | #8

      Flip the machine upside down.  Is there any outline appearing to be able to be knocked out or cut out?  Every dryer I've ever had has always had knocks on the bottom and side.  Remove the back panel to verify the exhaust duct capability.

      True, it's a blind connection using the bottom, but if you get things lined up and measured along with the receiving floor vent being attached to the floor boards so it doesn't move it can be done.  In fact, it makes a real attractive installation.

      1. FastEddie1 | Jul 25, 2004 07:58am | #9

        For a bottom outlet, why not make the hole in the floor about 3" bigger, then make the connection from below after the dryer is in place.

        Whenever you are asked if you can do a job, tell'em "Certainly, I can!"  Then get busy and find out how to do it.  T. Roosevelt

        1. DANL | Jul 25, 2004 03:24pm | #11

          Ed's got a good idea--make a larger hole--no one will see it, it'll be covered by the dryer. Then you can attach the vent duct from the basement.

      2. SEBDESN | Jul 25, 2004 04:13pm | #12

        One thing I forgot to mention is that you may need a special "kit" to make it come out other than the back. The one I had needed one and had to open up the back, and change,and add to  the piping  to come out the side..Used a front loader w/d and stacked it in a closet with clearance on the side for the vent,that went down thru the floor to the crawl, and then out.The plane of the side vent is the same as the center down vent,a couple inches to the front of the machine. It is a real tidy install with pocket doors and shelves and space for brooms on the vent side...

  5. edwardh1 | Jul 25, 2004 02:28pm | #10

    My mom has a 1965 GE dryer that is like that - to pull the dryer out you must first tip it over forward

  6. jons1 | Jul 26, 2004 07:34am | #13

    Wow, thanks for all the input. It looks like I've got some research to do with the dryer and maybe a kit. I do know it has the "punch-outs" on the bottom.

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