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  1. #14
    Join Date
    Jan 2004
    Location
    Lancaster PA
    Posts
    66,758
    That depends on what your sensible load really is.

    If your sensible load is 15,600, the 3 ton 2 stage won't remove enough moisture.
    If its 17,000, the 3 ton 2 stage should be ok.

    Those AHRI ratings are for 400 CFM per ton, so if you slow the VS blower down, you can increase its latent, and lower its sensible.
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  2. #15
    Join Date
    Aug 2002
    Location
    Office and warehouse in both Crystal River & New Port Richey ,FL
    Posts
    18,836
    Quote Originally Posted by beenthere View Post
    He's designing and building his own units and system.
    He is going to grossly over size his heat pump.
    There is no way it will remove enough moisture.
    So a dehumidifier is the only way.

    What he's doing would be more headache then its worth, in Joe home owners house.
    So and a bandaid,I mean dehumidifier!!LOL

  3. #16
    Join Date
    Jun 2007
    Location
    Bucks Co PA
    Posts
    364
    Quote Originally Posted by Poodle Head Mikey View Post

    I used to propose that people installed two heat pump systems - for the exact same reason - one as the back-up to the other. Plus; the redundancy of having two complete systems for AC.
    Man, I've been trying to do that for years. Everybody (HVAC techs) all but said I was nuts and it was impossible.
    .

  4. #17
    Join Date
    Sep 2002
    Posts
    11,538

    You just get used to it after a while <g>

    Some years ago I hit on the idea of using heat pumps to do refrigeration in a warehouse. To defrost the coils I wanted to just kill the O wire to the outdoor units and so make the big Bohn evaporators heat up and melt the ice. I used a check valve parallel to the refrigeration TXV.

    People screamed that I was crazy, said it would never work, and that I should just use electric heaters, or hot gas, like everybody else. So I installed the heat pumps. <g>

    Worked really well and defrosted in a few minutes. <g>

    The dual heat pumps idea came to me first in the 1980's when I was sort of lamenting the imbalance between the heating and cooling loads in this area. It annoyed me that I had to design for cooling and let heating just fall wherever. Using two heat pumps was the best I could come up with then. The problem was that the initial cost was too high for most people. Big Eddie didn't care - "do whatever you think is right. I know you'll do the right thing for me."

    It's a funny story: when I was a young boy I had bashed his young race horse colt across the head with a 2 by 4 for kicking me. Eddie and I were sort of friends after that.

    PHM
    ------------


    Quote Originally Posted by Jack2007 View Post
    Man, I've been trying to do that for years. Everybody (HVAC techs) all but said I was nuts and it was impossible.
    .
    PHM
    --------
    The conventional view serves to protect us from the painful job of thinking.

  5. #18
    Join Date
    Jan 2004
    Location
    Lancaster PA
    Posts
    66,758
    Quote Originally Posted by Poodle Head Mikey View Post
    It's a funny story: when I was a young boy I had bashed his young race horse colt across the head with a 2 by 4 for kicking me. Eddie and I were sort of friends after that.

    PHM
    ------------
    Guess that means you still don't remember him hitting you over the head with that same 2 x 4.
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  6. #19
    Join Date
    Aug 2002
    Location
    Office and warehouse in both Crystal River & New Port Richey ,FL
    Posts
    18,836
    You could size the A/C to low stage and gain heat pmp capacity,but you give up all the advanages of two stage cooling,or add a dehumidifier,to make up for it.

  7. #20
    Join Date
    Sep 2002
    Posts
    11,538

    Eddie could have killed me, but he didn't

    When I was small I used to walk across a big field and through some woods to get to my friend's house. Eddie built a big house, some horse stables, and pastures in that field. I still walked across it. The were horses in it and I used to pet them, feed them grass, and so forth. One young colt, big but less than a year, was curious and came over. I talked to him, rubbed his nose, rubbed his neck, etc. and he was fine.

    Then as soon as I turned my back he spun around and kicked me in the shoulder with both back feet. Like a sucker-punch. Then he was all cocky and bouncing around and running his mouth. I got to the far fence and found a 2 by 4 about 5 feet long sitting behind that neighbor's garage. So I got it and went back. The colt was still all full of himself. When I got close enough I swung a home-run swing and bashed him across the side of the head. That really surprised him and he ran away.

    A guy from the stables came running over and started yelling. He grabbed me and escorted me up to the big house. He was pissed off and so sure that Eddie was going to do something about it. I was pretty scared.

    Turned out it was some big-deal racing colt that Eddie had paid some huge amount of money for.

    The stable guy rang the bell, Eddie's wife answered and then got Eddie. The stable guy told him that I had bashed his new colt in the head with a board.

    Eddie asked me if I had and I said yes. He asked me why and I said: that sonofa***** kicked me first! He was nice to my face and then when I turned to walk away he kicked me.

    Eddie told the stable guy that he would handle it and took me into the house and closed the door. Then he asked to hear the whole story. I told him and then he almost smiled and said that he would have probably done the same thing. We talked for a while, he asked what my name was and where I lived. His wife brought me cookies.

    After that he was always friendly to me. If he would drive by on the street he would always wave and sometimes pull over to ask how I was doing. Later I started doing some AC and heating work for him. He had some big businesses but he really laundered Mafia money for a living. He was always good to me.
    PHM
    --------
    The conventional view serves to protect us from the painful job of thinking.

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