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  1. #1
    Join Date
    Oct 2005
    Posts
    70
    I posted here a while back about an Ameristar hvac system that was installed in my attic w/the evap. coil facing the wall and completely inaccessible. It turns out there are several other problems w/this install, not the least of which is that the installer flat out lied about having a permit for the job. Another problem is that the furnace he installed - a CDX080 - is not as quiet as he promised it would be. The attic is my office and having this thing kick on and off right next to me is going to be a problem. It turns out my installer can't fix the problem w/the coil and can't (or won't?) get a permit, so I'm thinking I might have to let him go and bring in someone who can do it right.

    I called in the company that does my hvac servicing to take a look and their guy said this Ameristar furnace is crap and recommended pulling it out and putting in a Carrier Infinity 96. He said this unit is so quiet I won't even know it's running most of the time. And the coil will face forward so it can be serviced, if need be.

    My questions are, is the Infinity 96 as quiet as he says it is? Is there an American Standard unit that is just as quiet? And, if so, would it be better to stick w/American Standard given that the outside unit (which he doesn't plan to change) is American Standard? In other words, is there any problem w/compatibility between a Carrier furnace/coil and an American Standard condensing unit?

    Thanks!





  2. #2
    Join Date
    Feb 2003
    Posts
    65

    mvp or b

    very quiet if noise is a problem consider oversizeing furnace and lock in low also duct siziing is very importantThe MVP is now MVB 2dbs Quieter

  3. #3
    Join Date
    Feb 2004
    Location
    Central Kansas
    Posts
    1,145
    It doesn't really cause problems with a mixed marriage of brands in a case like this. The Carrier won't mind if it is tied to a Am. Standard condensor. It WILL be quieter. I'm sure A/S makes a quiet unit, but it sounds like your Carrier guy is the one of the two I'd be dealing with.
    Don't confuse me with facts, my mind is already made up.

  4. #4
    Join Date
    Nov 2004
    Posts
    35
    My Infinity 96 is extremely quiet.

  5. #5
    Join Date
    Jun 2001
    Location
    Louisville, KY
    Posts
    12,189

    Re: mvp or b

    Originally posted by a7a
    ...if noise is a problem consider oversizeing furnace and lock in low...
    huh? why would you do this? what exactly is this accomplishing?

  6. #6
    Join Date
    Apr 2004
    Location
    Midwest
    Posts
    2,682

    Re: Re: mvp or b

    Originally posted by jrbenny
    Originally posted by a7a
    ...if noise is a problem consider oversizeing furnace and lock in low...
    huh? why would you do this? what exactly is this accomplishing?
    This way you can sell them a very expensive single stage unit.
    Live each day like it is your last, for one day you will be right!

  7. #7
    Join Date
    May 2000
    Location
    Indianapolis, IN, USA
    Posts
    34,109
    Now how did you get that post in so quick? Run right up to your laptop?

    The CDX isn't that noisy of a furnace. It is a builder grade but still... I'd guess it is oversized or underducted. Make sure whatever dealer looks at replacing it takes this into consideration. A variable speed could make it worse with air noise since the ECM will push harder to move the air.

    The Freedom 90 2 stage variable speed is also a very quiet furnace when you stand beside it. Ours is a downflow in the 2nd floor. Right in front of it you barely hear it. Below it on the first floor above the salesmens' desks, you get a good hum of air noise.

  8. #8
    Join Date
    Oct 2005
    Posts
    88

    Re: Re: mvp or b

    ...if noise is a problem consider oversizeing furnace and lock in low...
    huh? why would you do this? what exactly is this accomplishing?
    it's too hard to explain to anyone who couldn't see why the guitar amps in _This is Spinal Tap_ went up to 11.

  9. #9
    Join Date
    Apr 2004
    Location
    Midwest
    Posts
    2,682
    Originally posted by BaldLoonie
    Now how did you get that post in so quick? Run right up to your laptop?

    Hey, I have nothing better to do while sitting in this hotel room!

    Whats your excuse?!
    Live each day like it is your last, for one day you will be right!

  10. #10
    Join Date
    Jun 2001
    Location
    Louisville, KY
    Posts
    12,189
    Originally posted by hvac r us 2
    Originally posted by BaldLoonie
    Now how did you get that post in so quick? Run right up to your laptop?

    Hey, I have nothing better to do while sitting in this hotel room!

    Whats your excuse?!
    So, that's why res tech support didn't return my call today! Too busy hanging with you. Did you learn anything today?

  11. #11
    Join Date
    Jan 2004
    Location
    Lancaster PA
    Posts
    67,935

    Re: mvp or b

    Originally posted by a7a
    very quiet if noise is a problem consider oversizeing furnace and lock in low also duct siziing is very importantThe MVP is now MVB 2dbs Quieter

    ZOOOOOM, right over my bald head.



    Would a proper sized furnace, and duct system be better.
    Contractor locator map

    How-to-apply-for-Professional

    How many times must one fix something before it is fixed?

  12. #12
    Join Date
    Apr 2004
    Location
    Midwest
    Posts
    2,682
    Originally posted by jrbenny
    Originally posted by hvac r us 2
    Originally posted by BaldLoonie
    Now how did you get that post in so quick? Run right up to your laptop?

    Hey, I have nothing better to do while sitting in this hotel room!

    Whats your excuse?!
    So, that's why res tech support didn't return my call today! Too busy hanging with you. Did you learn anything today?
    Nah, just got into town...class starts tomorrow. So after tomorrow I will be smart.
    Live each day like it is your last, for one day you will be right!

  13. #13
    Join Date
    Oct 2005
    Posts
    70

    Re: mvp or b

    Originally posted by a7a
    very quiet if noise is a problem consider oversizeing furnace and lock in low also duct siziing is very importantThe MVP is now MVB 2dbs Quieter
    Thanks, but I have no idea what this means. Any translators in the house?

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