Page 1 of 2 12 LastLast
Results 1 to 13 of 20
  1. #1
    Join Date
    Feb 2005
    Posts
    3
    I will be having my ancient gas furnace replaced by a high efficiency gas furnace (Trane, XR90). Part of the installation includes venting to the outside. The big question: what factors are used to figure out where the vent should be? I can't find any info on this. Is the vent loud or ugly? How big is it? Can I get a picture BEFORE the installers come?

    I realize that the furnace vent cannot be near my dryer vents, so that rules out one side of the house (the dryer vent is basically in the middle of my house and I think the code is that the vents should be at least 10 feet away). Since I don't think it should vent to the front, that leaves two sides: the back or the remaining side.

    The remaining side of the house abuts my driveway. Is there any reason that would make this a bad choice? My concern is that it would be in full view every time I enter the house. That leaves the back of the house. The pipe would then have to go underneath all the beams of basement ceiling - is this viable?

    Also.... it's going to be around 20-30 degrees here - I'm assuming the installation will be done in one day & I will have heat that night. Should I worry about this or double check with the installer? I certainly don't want frozen pipes!!

    Thanks so much!

  2. #2
    Join Date
    Nov 2001
    Posts
    1,874
    Your pipes won't freeze at those temps for 1 night.

    The exhust is not loud, Most times it can go about anywhere. If you have concerns about it being an eye sore
    Talk to your installtion crew before they begain.

    I try to go over that with customers during the estimate,So no-one gets surprised later.
    If you try to fail, and succeed.
    Which have you done ?



  3. #3
    Join Date
    Feb 2005
    Posts
    3
    The only codes I know of are that exhaust vents need to be more than 5' from an openable window. There are no codes that say you can't place the vent near a dryer vent. If your installer is doing a normal job the intake and exhaust will be in the same termination... about 4-5" diameter and sticks out 6-7". We operate under UBC and UMC rules here... though I don't believe IBC is much different.

  4. #4
    Join Date
    Feb 2005
    Posts
    655

    Cool

    The PVC vent size is determined by Furnace size [BTUH]and the distance from furnace to outside,Standard is 2" or 3" but all this information comes with installation instructions. Also distance from windows,Doors etc.
    The vent normaly pitches back to furnace.I use a lot of 50,000 BTUH condensing units and can run 2" PVC 40' with Four 90s.

  5. #5
    Join Date
    Feb 2005
    Posts
    3
    Thanks for all the replies. If the vent sticks out 6-7", I don't think the driveway side is a good idea. It would be *extremely* noticeable. But, if it's true about the fact that it needs to be 5' from an openable window, then that's a problem since there are basement windows on all sides except the front.

    I'm going to search for online installation instructions; if anyone knows a site, I'd appreciate any help. I agree with one poster that it's best to have "no suprises", but I sort of feel I'm doing this in the dark. I hate to do this, but maybe I should ask the rep to return before the installation so that this can be cleared up. Is that being really pushy?

  6. #6
    Join Date
    May 2004
    Location
    Rapid City, SD
    Posts
    7,405
    Do a search for Bayvent terminations. It's basically a wall termination that Trane makes, it only sticks out 2 inches (roughly) from the side of the house), looks really nice and works great.

    Ask the installers/salesman about them, I'm pretty sure they should be able to use one.

  7. #7
    Join Date
    Feb 2004
    Location
    southern illinois
    Posts
    5,522
    CAN YOU GO UP THRU ROOF?....sorry bout the caps.

  8. #8
    I thought it was normally 7' high if on a walkway or driveway, 3' from any other penetration, or appliance ( a\c unit or meter gas\electric and one foot above expected snowfall level. expected snowfall level here is 18 " so 30 " off the ground before you even start. Or abandon the chimney and use it as a chase.

  9. #9
    Join Date
    Feb 2005
    Posts
    3
    I'm considering moving my furnace, which would require a hi efficiency due to no chimney where I want to move it to. However, venting through the closest wall at the new location would be under a 3' high semi-enclosed deck. I found the below venting instructions for a direct vent boiler, and assume they apply to any direct vent furnace. Are they any simple external solutions for this, or is this a non-starter?



    Do not wrap or insulate vent pipe and fittings.

    Do not extend exposed vent pipe outside of building. Condensate could
    freeze and block vent pipe.

    A gas vent extending through an exterior wall shall not
    terminate adjacent to the wall or below building
    extensions such as eaves, parapets, balconies or decks.

  10. #10
    Join Date
    Feb 2003
    Posts
    1,996
    No go venting under a deck. Get the install manual for that model furnace. Every 90% efficent appliance is different. Don't go by a boiler manual.

  11. #11
    Join Date
    Feb 2005
    Posts
    3
    I haven't selected a new furnace yet (because I don't know if I can relocate it yet), but I'm not sure that a furnace install manual would say how I would solve my deck problem - I expect it would say "don't do it" or "consult local building codes".

    I've found the following product, which is a snorkel for increasing the termination height by up to 3', external to the house. I don't have a problem cutting a hole in my deck. Would this device would be compatible with a (any) 90% furnace? If so, are these things common enough that any HVAC guy would know about them?

    http://www.selkirkinc.com/pdfs/chim/DirectTemp.pdf



  12. #12
    Join Date
    Feb 2005
    Posts
    3
    I haven't selected a new furnace yet (because I don't know if I can relocate it yet), but I'm not sure that a furnace install manual would say how I would solve my deck problem - I expect it would say "don't do it" or "consult local building codes".

    I've found the following product, which is a snorkel for increasing the termination height by up to 3', external to the house. I don't have a problem cutting a hole in my deck. Would this device would be compatible with a (any) 90% furnace? If so, are these things common enough that any HVAC guy would know about them?

    http://www.selkirkinc.com/pdfs/chim/DirectTemp.pdf



  13. #13
    Join Date
    Jan 2005
    Location
    Massachusetts
    Posts
    506
    Do u get alot of snow there. I wish I could find the link but 4 people in Plymouth Mass were found half dead in their house after their vent became blocked by snow last month. One of the children died later in the hospital. Now around here there is lots of talk about revamping the previous codes

Page 1 of 2 12 LastLast

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •  
Comfortech Show Promo Image

Related Forums

Plumbing Talks | Contractor Magazine
Forums | Electrical Construction & Maintenance (EC&M) Magazine
Comfortech365 Virtual Event