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A/C
OPERATING COST CALCULATOR
AUTOMATIC CALCULATOR TO HELP
DETERMINE YOUR ESTIMATED MONTHLY AIR CONDITIONING USAGE COST
Created by Aldrin M. Villahermosa
With the constant increase in fuel cost, a major factor to consider when purchasing an air conditioning system for your is being able to estimate just about how much you are going to actually pay per month to run your new air conditioning system. Purchasing a unit based on the bottom line proposed cost alone is not a good idea, the efficiency rating should be just as important as the proposed cost for your air conditioning project. Use the following Automated A/C Usage Calculation tool to help determine your monthly usage cost.
Before running AMV Air Conditioning Inc. Automatic A/C Usage Cost Calculator you will need the gather and note down the four following information:
- BTU rating of your air conditioning equipment.
(i.e. 3 ton x 12,000 = 36,000 BTU’s or 5 ton x 12,000 = 60,000 BTU’S,
etc.). Want to know, “What is a ton of refrigeration?” simply click here to move to the bottom section of this page to help answer your question.
- Hours of operation.
240 hours per month is about average. If you plan to use your air conditioner during the summer from about 3:00 to 9:00 p.m. Monday through Friday and 11:00 am to 10:00 pm during the weekend, your usage will be around 240 hours per month during our typical warm summer and early fall months.
- The current cost per kilowatt hour that HECO is charging you.
Simply look at your most recent
HECO electric bill and look at the last two columns on the right hand side.
Divide the amount in the “$/DAY” column by the number indicated
in the “KWH/DAY”. Example to follow will show a customer that pays
around 16 cents per kilowatt hour, (i.e.: $/DAY @ $6.39 divided
by KWH/DAY @ 39.7 = $.16 per KWH)
- Hours of operation.
240 hours per month is about average. If you plan to use your air conditioner during the summer from about 3:00 to 9:00 p.m. Monday through Friday and 11:00 am to 10:00 pm during the weekend, your usage will be around 240 hours per month during our typical warm summer and early fall months.
Note down all four numbers from the above information and input it into the each respective box in our Automatic A/C Usage Cost Calculator:
Disclaimer: AMV Air Conditioning Inc.
Automatic A/C Usage Calculator
has been designed to give you an estimated usage
amount only. Design conditions will vary from home
to home based on the design and construction of
your home, the design of your air conditioning
system, the placement of the thermostat and whether
or not the unit is being properly maintained. Since
the thermostat job is to cycle the on and off operation
of your air conditioning unit, the actual run time
of your system will vary based on these mentioned
design conditions. Therefore this automatic a/c
usage calculator is to be used as a reference guide
only. The unauthorized use of this automatic calculator
as a link to any other website
is strictly prohibited. Legal actions will be taken
to the fullest extent of the law.
WHAT IS A TON OF REFRIGERATION?
The cooling capacity of older refrigeration units is often indicated in "tons of refrigeration". A ton of refrigeration represents the heat energy absorbed when a ton (2000 lbs.) of ice melts during a 24-hour day. The ice assumed to be solid as 32 degrees F. (0 degrees C.) initially and becomes water at 32 degrees F. (0 degrees C.). The energy absorbed by the ice is the latent heat of ice times the total weight.
Today, refrigeration units are often rated in Btu/hr. instead of tons. The Btu equivalent of one ton of refrigeration is easy to calculate. Multiply the weight of one ton of ice (2000 lbs.) by the latent heat of fusion (melting) of ice (144 Btu/lb.). Then divide by 24 hours to obtain Btu/hr.
One ton of refrigeration effect= 2000 X 144/24
One ton of refrigeration effect= 288,000 Btu/24 hours
One ton of refrigeration effect= 12,000 Btu/hr.
A 12,000 Btu/hr cooling capacity is equivalent to one ton of refrigeration.
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