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  1. #1
    Join Date
    Mar 2006
    Posts
    254

    Sound deading mat to lower blower noise

    Ok, I'm trying to reduce noise, so I don't think this is a DIY violation.

    Everyone here has been helping me with my newly installed Carrier 38HDR
    and Carrier Performance 80 recent install. A small 887 sq. ft. condo with
    the furnace closet placed in the hallway near living room. Plenty adequate
    return which basically below that same closet. The issue was the limiting
    the noise from such a setup as having a furnace closet practically in your
    lap.

    Anyways..I have managed to reduce the sound significantly by lining the return cavity under the closet with 2" fiber material. That helped tremendously.
    Besides the plenum board that they lined the closet walls with, I added closed
    foam fire retardant sound absorbing/blocking foam. That helped a lot too!

    My living room register box was so damn damn close to the plenum, I extended the flex duct by going back and making a gentle U-turn back to
    that LR register box. That helped tremendously quiet without dropping air flow that much at all.

    Now on to my question, I used Dynamat on both sides of the exterior furnace wall panels and also on the front panel, even on the evaporator coil box.
    That has absorbed significant noise sound from Carriers blower motor.

    Is that Dynamat on the side panels of the furnace going to cause any problem? As I understand it, the side panel of todays furnaces get no
    hottter than 120F which the Dynamat is supposed to handle, seeing as
    Dynamat is used in cars which can get up to 140F (windows closed, hot day)

    I can always peel it off if you guys recommend I do so.

    Thanks.

  2. #2
    Join Date
    Feb 2003
    Location
    Huntsville,AL
    Posts
    4,125
    don't restrict the air flow eg: adding bends, material inside of ducts

    probably, after 6 months, you will consider this to be white noise.

    when I switched from oil to gas, the gas valve switching on awakened me for 1st week!
    harvest rainwater,make SHADE,R75/50/30= roof/wall/floor, use HVAC mastic,caulk all wall seams!

  3. #3
    Join Date
    Mar 2006
    Posts
    254
    I've not had much help here.

    I've quieted my entire small condo (furnace in the hall) on my own.

    I ask if dynamat (it's a synthetic rubber sound absorbing mat) will be
    OK to attach to my furnaces side panels.

    I get jack here.

    Dig this. I have gotten Jack here from the moment I dug this forum and asked questions.

    I got jack crud back and that is no big deal. I got more info about sound from an install theatre forums than I ever got from you yokels.

    Between each one of you (tech experts)...I did it on my own,

    I quieted my system WITHOUT YOU SO CALLED EXPERTS.
    And you telling me to get 15 other companies to come out and do me right.

    I guess that makes me the most popular guy around here.

    New System.

    When it comes to quieting an AC system, I did it your way...ON MY OWN.

    30 threads here asking, and I did it on my freaking own. Quieted it down on my own.
    Sometimes this place is a joke. Then again..who isn't perfect. Emotional equity here.

    GUYS...THANKS...but noone here helped me but myself.


    Now...after I've insulted you all to the extreme....(really I had to sound proof on my own).
    Do ya think my condo is going up in smoke by attaching Dynamat on my furnace side panels?

    I suppose I should have waited untill everyone was here.

    (It's a son of a ***** to quiet down a small condo system). I succeeded on my own!

    Small 887 sq. ft condo with new Carrier 2 ton and Performance 80 furnace.

    Just for reference...I got no help here. None that was usefull..None that I used.

    And I still freaking got it done.

  4. #4
    Join Date
    Aug 2002
    Location
    Office and warehouse in both Crystal River & New Port Richey ,FL
    Posts
    18,836
    You have likely used an unapproved material,contactors can't do that,due to liability issues.

  5. #5
    Join Date
    Mar 2005
    Location
    Houston, Texas
    Posts
    11,847
    Quote Originally Posted by caslon View Post
    I've not had much help here.

    I've quieted my entire small condo (furnace in the hall) on my own.

    I ask if dynamat (it's a synthetic rubber sound absorbing mat) will be
    OK to attach to my furnaces side panels.

    I get jack here.

    Dig this. I have gotten Jack here from the moment I dug this forum and asked questions.

    I got jack crud back and that is no big deal. I got more info about sound from an install theatre forums than I ever got from you yokels.

    Between each one of you (tech experts)...I did it on my own,

    I quieted my system WITHOUT YOU SO CALLED EXPERTS.
    And you telling me to get 15 other companies to come out and do me right.

    I guess that makes me the most popular guy around here.

    New System.

    When it comes to quieting an AC system, I did it your way...ON MY OWN.

    30 threads here asking, and I did it on my freaking own. Quieted it down on my own.
    Sometimes this place is a joke. Then again..who isn't perfect. Emotional equity here.

    GUYS...THANKS...but noone here helped me but myself.


    Now...after I've insulted you all to the extreme....(really I had to sound proof on my own).
    Do ya think my condo is going up in smoke by attaching Dynamat on my furnace side panels?

    I suppose I should have waited untill everyone was here.

    (It's a son of a ***** to quiet down a small condo system). I succeeded on my own!

    Small 887 sq. ft condo with new Carrier 2 ton and Performance 80 furnace.

    Just for reference...I got no help here. None that was usefull..None that I used.

    And I still freaking got it done.
    Get over it & go away please.

  6. #6
    Join Date
    Mar 2006
    Posts
    254
    I got more doing on my own than all the pics I provided and all the detailed asking here.

    ON MY OWN.

    I think a lot of you are just installers. When it comes to NIC type tuning or suggestions...most of this place is nuts and freaking bolts mentality.

    Before you ban me....I offered up pics, detailed descriptions.

    I made out on my freaking own better than this place.

    I GOT NOTHING OF VALUE here. Well meaning, maybe, but I ended up
    doing better on my freaking own!

    I just asked if it was OK to attach Dynamat to the side of a new furnace. It redused a lot of the blower motor noise. I asked if the side panels of furnace will be to hot to keep the Dynamat on there, and if it will get too hot. Noone here has a freaking clue and didn't respond.

    I did better on my own than here.

  7. #7
    Join Date
    Mar 2005
    Location
    Houston, Texas
    Posts
    11,847
    Quote Originally Posted by caslon View Post
    I got more doing on my own than all the pics I provided and all the detailed asking here.

    ON MY OWN.

    I think a lot of you are just installers. When it comes to NIC type tuning or suggestions...most of this place is nuts and freaking bolts mentality.

    Before you ban me....I offered up pics, detailed descriptions.

    I made out on my freaking own better than this place.

    I GOT NOTHING OF VALUE here. Well meaning, maybe, but I ended up
    doing better on my freaking own!

    I just asked if it was OK to attach Dynamat to the side of a new furnace. It redused a lot of the blower motor noise. I asked if the side panels of furnace will be to hot to keep the Dynamat on there, and if it will get too hot. Noone here has a freaking clue and didn't respond.

    I did better on my own than here.
    Well, you got what you paid for. Nothing.

  8. #8
    Join Date
    Mar 2006
    Posts
    254
    That's damn true...seeing as none here can answer the question I proposed about attaching noise/vibrating reducing Dynamat to my furnace side panels.

    Oh ya...120F is about like a hot bath. 98.8F is body temp.

    I wasted so much bandwidth with you guys...the net can take it.

    But you'll be pleased as punch to know I got nothing here but status quo bs.

    Conflicting status quo bs to boot.

    I made out on my own.

    When it comes to silencing an hvac system...go the the home theatre forums.
    Forget this place.

  9. #9
    Join Date
    Jul 2002
    Location
    Zelienople, Pa
    Posts
    2,965
    Quote Originally Posted by caslon View Post
    That's damn true...seeing as none here can answer the question I proposed about attaching noise/vibrating reducing Dynamat to my furnace side panels.

    Oh ya...120F is about like a hot bath. 98.8F is body temp.

    I wasted so much bandwidth with you guys...the net can take it.

    But you'll be pleased as punch to know I got nothing here but status quo bs.

    Conflicting status quo bs to boot.

    I made out on my own.

    When it comes to silencing an hvac system...go the the home theatre forums.
    Forget this place.
    You got tons of valuable information for FREE here. Just reread some of your 130 posts.
    As to your dynamat question, contact the manufacturer of your furnace and ask them.
    More than likely you've breeched the UL rating on the furnace which will void the warranty.
    Let your house burn down and you will have a definite answer from your insurance!
    Sounds like somebody had a few too many drinks last night and shouldn't have been in front of the computer...

    Good bye Cotty Gee....
    How tall are you Private???!!!!

  10. #10
    Join Date
    Mar 2001
    Location
    North Carolina
    Posts
    428
    Quote Originally Posted by caslon View Post
    I've not had much help here.

    I've quieted my entire small condo (furnace in the hall) on my own.

    I ask if dynamat (it's a synthetic rubber sound absorbing mat) will be
    OK to attach to my furnaces side panels.

    I get jack here.

    Dig this. I have gotten Jack here from the moment I dug this forum and asked questions.

    I got jack crud back and that is no big deal. I got more info about sound from an install theatre forums than I ever got from you yokels.

    Between each one of you (tech experts)...I did it on my own,

    I quieted my system WITHOUT YOU SO CALLED EXPERTS.
    And you telling me to get 15 other companies to come out and do me right.

    I guess that makes me the most popular guy around here.

    New System.

    When it comes to quieting an AC system, I did it your way...ON MY OWN.

    30 threads here asking, and I did it on my freaking own. Quieted it down on my own.
    Sometimes this place is a joke. Then again..who isn't perfect. Emotional equity here.

    GUYS...THANKS...but noone here helped me but myself.


    Now...after I've insulted you all to the extreme....(really I had to sound proof on my own).
    Do ya think my condo is going up in smoke by attaching Dynamat on my furnace side panels?

    I suppose I should have waited untill everyone was here.

    (It's a son of a ***** to quiet down a small condo system). I succeeded on my own!

    Small 887 sq. ft condo with new Carrier 2 ton and Performance 80 furnace.

    Just for reference...I got no help here. None that was usefull..None that I used.

    And I still freaking got it done.

  11. #11
    Join Date
    Mar 2005
    Location
    Houston, Texas
    Posts
    11,847
    Quote Originally Posted by Gunnery Sergeant Hartman View Post
    You got tons of valuable information for FREE here.

    Good bye Cotty Gee....
    How could I forget Mr. Cottage Cheese. This is his brother.

  12. #12
    Join Date
    Mar 2006
    Posts
    254
    Let us not forget nuts and bolts approach to quieting a system in a small
    one floor 887 sq. ft condo. Granted...a small condo with closet in your lap.

    I got nuts and bolt head replies.

    I did better than any here, that's for damn sure. 10 db less.
    That's 3+ times quieter. Lunk heads.

    Everything I got from here was...not much.

    That's why the forums of home theatre get better results.

    This forum knows nothing about quieting a system.

    Freaking nuts and bolts goes so far.

    "it must be duct work or unbalanced system"! OK. NOT

    You guys are cool....only so far tho.

    Another thing...whoever here said I would improve my sound by ONLY 3 db's....that cuts the sound
    in half as percieved by the human ear.

  13. #13
    Join Date
    Mar 2005
    Location
    Houston, Texas
    Posts
    11,847
    Quote Originally Posted by caslon View Post
    Let us not forget nuts and bolts approach to quieting a system in a small
    one floor 887 sq. ft condo. Granted...a small condo with closet in your lap.

    I got nuts and bolt head replies.

    I did better than any here, that's for damn sure. 10 db less.
    That's 3+ times quieter. Lunk heads.

    Everything I got from here was...not much.

    That's why the forums of home theatre get better results.

    This forum knows nothing about quieting a system.

    Freaking nuts and bolts goes so far.

    "it must be duct work or unbalanced system"! OK. NOT

    You guys are cool....only so far tho.

    Another thing...whoever here said I would improve my sound by ONLY 3 db's....that cuts the sound
    in half as percieved by the human ear.

    Do your homework about sound. Dash and others.
    How in the world can you hear the unit running? Your whining drowns out any noise the unit could ever make.

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