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terminating a central vacuum pipe vent

mlawrence17 | Posted in General Discussion on March 5, 2008 11:26am

Any one have any suggestions for terminating a central vacuum pipe that’s vented outside. I thought of trying to use sa 3″ fan vent but the vac pipe is only 2″. I suppose I could rout some slats out of of some 1x but I don’t want to restrict airflow.

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  1. MikeSmith | Mar 05, 2008 11:38pm | #1

    Nutone/Broan sells a sidewall  boot for terminating

    Mike Smith Rhode Island : Design / Build / Repair / Restore
  2. Aaron | Mar 06, 2008 12:15am | #2

    Could you use a 2 inch to 3 inch reducer and then have 3 inch pipe go to the fan vent?  Do you even need a vent?  How about a 90 degree elbow?

    1. MikeSmith | Mar 06, 2008 12:38am | #3

      here's the one we use

       you can also  get  an outlet vent with a flapper doorMike Smith Rhode Island : Design / Build / Repair / Restore

  3. Woodenitbenice | Mar 06, 2008 02:42am | #4

    Why are you venting your vaccuum?  Your vaccuumming up a tremendous volume of air that you have allready paid to heat or cool depending on your location.  Plus, if you dump all of this conditioned air outside, now you have created a negative pressure environment in your house.  The unconditioned air from outside is creaping in every crack and nail hole in you building envelope to equalize the pressure. 

     

    I spent a lot of time and money to vent the first central vac I ever did to the outside.  Then I thought about the cfm that I was wasting money on.  Ever since the waste air has been returned to the building.

    1. LIVEONSAWDUST | Mar 06, 2008 03:24am | #5

      I have to disagree with you , the fact that central vac's are vented outside is the main reason I like them

      most other vacuum's spew lots of dust right back into the air.

      Do the manufacturers specify how to vent? All I've seen are units vented outside

      Just my opinion

    2. MikeSmith | Mar 06, 2008 03:26am | #6

      wooden...one of the advantages ofcentral vac is the option to discharge  outside

      are you using  a hepa filter on your vac  ?  no...then you're moving a lot of very bad stuff around your house

      when you could be dumping it outside

      if you are that worried about losing some cfms , aren't you worried about air quality ?Mike Smith Rhode Island : Design / Build / Repair / Restore

      1. Woodenitbenice | Mar 06, 2008 05:05am | #7

        One house has had the vac dumping in the basement for 3 and a half years of everyday use.  No excessive dust, or even noticable dust on any hard surfaces.  I usually use Nutone 350s or 450s with Nutone bags.  I have seen other brands of vacs in other houses that look like dust pigs.  I can only speak for my experience.

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