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  1. #1

    2 Ton or 2.5 Ton

    1989 - When we had our AC installed we were advised to go with a 2 ton as the 2.5 ton would be too powerful and dry out the air too much. 25 year old house. 1,800 square foot back split with cathedral ceilings.

    Move ahead to 2008. We are replacing both our furnace and AC. The problem with our current AC is that when we get temps of 30C (86F) with a humidex of 38C, the current AC just can't get the house down below 25C.

    This is what we are going to be going with in either the Bryant or Carrier line.
    Bryant Preferred/Carrier Perfomance AC Units
    Bryant 355CAV/Carrier 58MVC Furnace
    Bryant Evolution/Carrier Infinity Control

    With newer technologies would you recommend staying with 2 ton or moving up to 2.5 ton? The only other figure I have is the design heat loss is 66,200 BTU/hr. at -25C.

    Thanks

  2. #2
    Join Date
    Jun 2004
    Location
    4H: Hot, Humid Houston H.O.
    Posts
    3,304
    Have you been told that a larger AC removes more humidity? That is the opposite of what I have been told. I am a homeowner in S.Texas (you are Canadian I am guessing) and believe our climate is very different from yours, but believe this issue is from the laws of physics.

    As a prospective customer, if I were in your shoes I would ask the installer what he is going to do to ensure airflow will be acceptable, if and when you install a new AC with 25% more airflow. Perhaps your heating system already uses a greater airflow than the AC requires.

    Best wishes -- Pstu

  3. #3
    Join Date
    Nov 2004
    Location
    North Carolina
    Posts
    443
    Opposite on the humidity.

    If the unit you have now isn't keeping up, why would you want the same size put back in? Either the load calculation was wrong or the ductwork is. Have both re-figured.

    BTU's are constant no matter what new technoligy comes along.

  4. #4
    Join Date
    Jan 2004
    Location
    Lancaster PA
    Posts
    68,095
    You were told wrong about the bigger A/C drying out the air too much. Larger units don't remove as much humidity. You should be fine with a 2.5 ton Infinity with VS blower and Infinity control. As far as it not allowing the hmidity get too high.
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  5. #5
    Join Date
    Feb 2008
    Location
    Dallas & Longview, TX
    Posts
    629
    The Infinity only comes in even ton sizes I believe. Does the Infinity controller control the Performance line of condensor?

  6. #6
    Join Date
    Jan 2004
    Location
    Lancaster PA
    Posts
    68,095
    The Infinty controller will contol the blower on the Infinity furnace. There are terminals in the furnace for non Infinity A/Cs.
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