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  1. #14
    Join Date
    Nov 2001
    Location
    Seattle, WA
    Posts
    7,756
    Quote Originally Posted by jpsmith1cm View Post
    1 ton = 12,000 btu. You can surely convert from there.
    That's per hour.
    "The American Republic will endure until the day Congress discovers it can bribe the public with the public's own money.
    - Alexis de Toqueville, 1835

  2. #15
    Join Date
    Aug 2007
    Location
    Eastern PA
    Posts
    21
    Ton is a term left over from the ice house days. Imagine the early days of refrigeration when cold storage was converted from ice to mechanical systems. An operator knew how many tons of ice they needed. A mechanical system would have to provide the same cooling power as however many tons of ice. The term has stuck with us ever since. Maybe because its handy like shoe sizes. Supposedly a one ton block of ice would provide 288,000 Btu over 24 hours or 12,000Btu/h. Not sure how valid that is.

  3. #16
    Join Date
    Jul 2008
    Location
    Rochester NY
    Posts
    4,721
    Nice explanations. Very interesting!
    Quote Originally Posted by csealer View Post
    Ton is a term left over from the ice house days. Imagine the early days of refrigeration when cold storage was converted from ice to mechanical systems. An operator knew how many tons of ice they needed. A mechanical system would have to provide the same cooling power as however many tons of ice. The term has stuck with us ever since. Maybe because its handy like shoe sizes. Supposedly a one ton block of ice would provide 288,000 Btu over 24 hours or 12,000Btu/h. Not sure how valid that is.
    Quote Originally Posted by csealer View Post
    I think one of the biggest differences between the European and US heat pumps is that the US units are reversible providing heating and cooling with one unit. Our heat pumps could be sized to cover 100% of the heating load but would be grossly over sized for cooling. So we're forced to compromise. Size for cooling and make up the difference in heating with auxiliary heat. There is also a matter of economics. It's much more expensive to install a 2-speed 5-ton that will cover heating and cooling demand than it is to install a 2-ton with auxiliary heat.
    Which makes more sense to you?
    CONSERVATION - turning your thermostat back and being uncomfortable. Maybe saving 5-10%
    ENERGY EFFICIENCY - leaving your thermostat where everyone is comfortable. Saving 30-70%

    DO THE NUMBERS! Step on a HOMESCALE.
    What is comfort? Well, it AIN'T just TEMPERATURE!

    Energy Obese? An audit is the next step - go to BPI.org, or RESNET, and find an auditor near you.

  4. #17
    Join Date
    Sep 2002
    Posts
    12,253

    BTU's and Kilowatts do not really convert

    Because BTUs and kilowatts measure different types of quantities.

    A BTU is a measure of heat energy.
    A kilowatt measures power (energy per unit time).

    1 BTU equals 0.0002928 kilowatt-hour

    1 BTU/minute equals 0.01757 kilowatt.

    To convert a watt to BTUs, the factor is:

    1 kilowatt of power = 3412.1416 BTU/hr
    3.412 BTUs equal a watt.

    1 kW = 3412.1416 BTU/hour

    PHM
    ---------




    Quote Originally Posted by jpsmith1cm View Post
    1 ton = 12,000 btu. You can surely convert from there.
    PHM
    --------
    The conventional view serves to protect us from the painful job of thinking.

  5. #18
    Join Date
    Nov 2008
    Location
    Tranas, Sweden
    Posts
    41
    Lol, this is the greatest forum! I'm overwhelmed with answers and explanations!
    (not to forget the occasional history lesson )

    Thank you all for your great answers! They are helping me as we speak

  6. #19
    Join Date
    Nov 2008
    Location
    Tranas, Sweden
    Posts
    41
    With the facts from this thread I calculated that:
    1 kWh = 0,2842313 ton
    1 ton = 3,5182613 kWh
    Is this correct?
    Last edited by Recessor; 09-14-2009 at 06:04 AM.

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