How to estimate the cost of running an airconditioner Your electric service bill is primarily based on the amount of electrical energy consumed which is measured in watts. (KWh) means one kilowatt or “1000 watts” per 1 hour. The cost of electricity (cost per KWh) will depend on how much you use, when you use it and for what purpose it’s used. During peak demand periods electric companies charge higher rates. Your electric bill should include the methods used to calculate the bill and the rates used. For the purpose of this post I will use an avg rate of $0.11 per KWh. So? How to calculate what it costs to run an air conditioner? That’s usually a two-step process. The compressor & condensing unit (outside) and a furnace blower motor are separate, so you have to make 2 calculations and add them together. There’s two ways to find out what your a/c is costing you to run. 1. You can use the electric meter and a stop watch, or 2, you can use a math formula. First, determine watts being consumed. Every electrical appliance has a data plate on it somewhere that lists the maximum wattage used or the voltage and amperage flow. Watts equals the product of Volts X amperage. Example; 240v X 16.5 amps = 3960 watts or 3.96KWh. 3.96KWh. @ a rate of $0.11per KWh this = $0.44 per hour or $5.23 for 12 hours. That’s about $160 per month +- 10% for the “Energy Efficiency Rating” (EER). Note: Regular inspections and routine maintenance is essential to preventing excessive consumption of electricity. A dirty air filter or a dirty coil reduces the volume of air flow which may cause the a/c to run continuously and can double the cost of air-conditioning. Generally there will be 2 air filters; one behind the fresh air grill (intake), and another one at the furnace. Keep grass clippings, weeds and leaves off of the condensing unit coil.
Posted on: Tue, 16 Jul 2013 07:11:30 +0000
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