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  1. #1
    Join Date
    Jul 2006
    Posts
    8
    Hi, i did a load calculation on my house and one of the dependant factors was the temperature outside. As that temperature goes up i noticed that the tonnage would go up by 1/2 ton. Now my question is how do u get the best of both worlds. I understand that u dont want too big but how do u compensate for those hot hot days; or do u not just worry aobut them


    thanks

  2. #2
    Join Date
    Jul 2006
    Location
    Southern CT
    Posts
    552
    You enter the summer design temp for your area, that's what to go by

  3. #3
    Join Date
    Aug 2002
    Location
    Office and warehouse in both Crystal River & New Port Richey ,FL
    Posts
    18,836
    Originally posted by psychometric
    You enter the summer design temp for your area, that's what to go by
    That's what to do.Plus there is a saftey factor built into the calculation,so it will do better then you might think above the design temperature.

    Another factor is say you need 26,000 btus total,and you select a 2.5 ton that's 28,500 btus total,you have even more extra capacity.Just and example ,as total btus is not the correct way to select equipment,Manual s is.


    If your indoor design is less then 78 to 80°,it's important to adjust capacity ,for those wanting 72 to 76° indoors.

  4. #4
    Join Date
    Feb 2003
    Location
    Huntsville,AL
    Posts
    4,125
    your choice --
    design for hottest ever recorded;
    design for 99% of time;
    design for 97% of time;
    or less -- if you are willing to let temp drift upwards, like me -- today my kit @82, 96F outdoor -- but, 5000btu/h for 2133sf - [3 bdrm closed off in trilevel]
    harvest rainwater,make SHADE,R75/50/30= roof/wall/floor, use HVAC mastic,caulk all wall seams!

  5. #5
    Join Date
    Apr 2002
    Posts
    11,808
    Originally posted by buzz427
    Hi, i did a load calculation on my house and one of the dependant factors was the temperature outside. As that temperature goes up i noticed that the tonnage would go up by 1/2 ton. Now my question is how do u get the best of both worlds. I understand that u dont want too big but how do u compensate for those hot hot days; or do u not just worry aobut them


    thanks
    When it is a real heat wave out, just go outside for 10 minutes and make sure the condenser air is blowing hot. Then go back inside and realize it is pretty cool inside afterall and be thankful you have central air.

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