Results 1 to 12 of 12
  1. #1
    Join Date
    Apr 2008
    Location
    Winston-Salem, NC
    Posts
    15

    Why is my new furnace so LOUD?

    When my new Trane XT80 was installed, because of the size of the new coil, they had to convert to side-return (my old furnace sat on a box and return air flowed up from the bottom)

    The return from upstairs now comes in on the left side of the furnace (filter on that side), the basement return (16'x16") now comes in on the right (there's about 17" from the wall to the furnace)

    Here in the basement the new furnace is much noisier than the old.

    Right now the basement return has the filter on the wall - I'm going to have them add another holder inside the furnace so I can move the filter there (instead of on the wall)

    Any other tips on reducing noise?

    Thanks!

  2. #2
    Join Date
    Dec 2008
    Location
    Buffalo NY
    Posts
    3,080

    Cool

    need more info,size of unit, size of house, size of ducts, are the ducts sealed and insulated?
    Join http://scopeny.org/ Shooter’s Committee on Political Education

    The world is full of sheep,try not to join the flock.

    Support the Skilled Trades, Don't DIY

  3. #3
    Join Date
    Nov 2008
    Location
    DFW,TX
    Posts
    2,169
    yea describe noise,does it sound starved for air or is it a rattling or vibrating sound?

  4. #4
    Join Date
    May 2007
    Location
    DC Metro Area (MD)
    Posts
    3,369
    Post a picture of the indoor setup--pros may be able to point out any potential restriction/size issues causing noise. Most likely it's the ductwork.

  5. #5
    Join Date
    Sep 2002
    Location
    I don't know
    Posts
    2,903
    Blower speed might be set too high - call installer back to check temperature rise and static pressure.
    General public's attitude towards our energy predicament: "I reject the reality of finite resource depletion and substitute it with my own; energy is infinite, we just need an alternative storage medium to run the cars on. The economy can grow indefinitely - we just need to "green" everything! Technology is energy! Peak what?"

  6. #6
    Join Date
    May 2009
    Location
    canyon country, CA
    Posts
    32
    is it a variable speed blower? if it is, it is speeding up b/c there is too much static pressure in the system and its trying to overcome it by speeding up. i do know that our ompany uses plenums off the side of furnaces if we do go into the side but we try to avoid it at all costs becaus of the noise

  7. #7
    Join Date
    Sep 2007
    Location
    wash dc metro area
    Posts
    78
    Quote Originally Posted by ncbill View Post
    When my new Trane XT80 was installed, because of the size of the new coil, they had to convert to side-return (my old furnace sat on a box and return air flowed up from the bottom)

    The return from upstairs now comes in on the left side of the furnace (filter on that side), the basement return (16'x16") now comes in on the right (there's about 17" from the wall to the furnace)

    Here in the basement the new furnace is much noisier than the old.

    Right now the basement return has the filter on the wall - I'm going to have them add another holder inside the furnace so I can move the filter there (instead of on the wall)

    Any other tips on reducing noise?

    Thanks!
    I bet ya that the installers did not set the dip switches in the airhandler or furnace for the proper air flow. I say this because my installers have missed this step on the varriable speed tranes several times lately. The factory default is highest airflow.

  8. #8
    Join Date
    Jun 2006
    Location
    New Jersey
    Posts
    4,330
    A XT80 does not have a variable speed. It does have a ecm motor, though. Two things to have your contractor check.....1) Is the proper speed selected for your application...2) Is the static pressure within factory spec.

    Also Im not sure how much louder the new furnace is over the old furnace, but a direct line of sight to the blower will cause increased air noise. There are ways of dealing with it, like lining the return with insulation.

  9. #9
    Join Date
    Feb 2007
    Location
    Colorado
    Posts
    127
    The return is on the wall next to the furnace, no sound barrior, your listening to the blower directly from the furnace through the ruturn, the furn is fine trust me, to reduce the noise have your installer find a way to make the return traval up and back to the blower compartment somehow to not have it right next to the wall.

  10. #10
    Join Date
    May 2009
    Location
    canyon country, CA
    Posts
    32
    Quote Originally Posted by ascj View Post
    A XT80 does not have a variable speed. It does have a ecm motor, though. Two things to have your contractor check.....1) Is the proper speed selected for your application...2) Is the static pressure within factory spec.

    Also Im not sure how much louder the new furnace is over the old furnace, but a direct line of sight to the blower will cause increased air noise. There are ways of dealing with it, like lining the return with insulation.
    definately good advice i know first hand that if you just put a return into the side it is pretty noisy definately check dipswitches. check heat rise, i would say that is the most importnant.

  11. #11
    Join Date
    Apr 2008
    Location
    Alberta Canada
    Posts
    2,246

    It is all in the Name

    They didn't name it trane for anyother reason, when they first fired it up, it sounded like a train. Sound is a part of comfort
    Do it right the first time.

  12. #12
    Join Date
    Apr 2008
    Location
    Winston-Salem, NC
    Posts
    15
    Thanks for all the replies!

    It was set on the highest speed (factory default) - no wonder I was getting no heat off the heat pump (temp dropped low enough to test the heat)

    It's about the same as it was with the old furnace now.

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