Time to Phase Out Rules of Thumb - High Performance HVAC Today - Hvac sizing rule of thumb
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The rule is usually something like this: Install one ton of air conditioning capacity for every (or ) square feet of conditioned floor area. On the vertical axis, I plotted the cooling load divided by the floor area, or square feet per ton. Remember, when HVAC contractors. Air conditioner sizing rules of thumb must die. That's what I wrote in my last article. The most common rule of thumb is to use square feet.