AR5500 Wall-mount AC with Faster Cooling, 24000 BTU/h 58 / 123 / 14325 000 BTU Room Air Conditioner Reconditioned (1 from $ 398.93) Kenmore 25,000 BTU Room Air Conditioner - Efficient and Powerful Cooling The large-capacity 25,000 BTU Kenmore room air conditioner 70251 features electronic controls with full function remote, a slide-out chassis and location-sensing technology. Large capacity, 25,000 BTU air conditioner cools more than 1600 sq. ft. of area Sleep mode helps you save energy Auto Cool features one-touch controls Filter check reminder signals when it is time to clean the filter so maintenance easier Electronic controls with full-function remote make for easy operation 8-way air direction control provides efficient cooling Location sensing maintains temperature based on the location of the remote Slide-out chassis allows quick and easy window installation Tilt-out filter access makes removing the filter easy The 410A refrigerant used for this unit is earth-friendly Kenmore air conditioner 70251 has a 9.4 EER rating

Kenmore 25 000 BTU Room Air ConditionerWritten This is a tough question to answer. I regularly check A/C's for power consumption and BTU output.  First of all, the label rarely relates to actual use.  Your home voltage can vary widely depending on your location. House voltage can vary from 105V to 130V based on my experience.  The SEER rating is an idealized number based on factors that may or may not exist in your home.  Think of this as the MPG rating you get on cars.  car ac leak detection dyeYou never get what is advertised.  portable ac units ductlessIf you want to find out how much your unit uses, find an HVAC company that can do efficiency testing and air balancing.  portable air conditioning unit self evaporating

here is a linkhttp://www.nationalcomfortinstit...Most HVAC companies are not familiar with this type of testing.  Make sure you ask for this specifically.  Most will do this for free or a small fee.Written That can be determined by looking at the efficiency rating.  Assuming you are using residential or light commercial equipment, here are the efficiency ratings and how to convert.SEER = Seasonal Energy Efficiency Ratio = Total seasonal Btu of cooling divided by total seasonal Watt-hrs of energy consumed.This is the rating used to describe residential systems (5.4 tons or less).  Its also used to determine the annual operating expenses listed on those yellow EnergyGuide stickers.Example:  For a 24,000 btu/hr (1 ton) unit with a 14 SEER rating, it would be consuming       (24,000 btu/hr / 14 btu/watt-hr) x 1kW/1,000 watt = 1.7 kWIf that same unit ran full out for 2 hours, that would be:      1.7kW x 2 hours = 3.4 kWhAssuming you have an electric rate of 10 cents/kWh, that would be $0.34.EER =  Energy Efficiency Ratio = Total Btu of cooling divided by total Watt-hrs of energy consumed.

This is the rating used to describe commercial systems (greater than 5.4 tons).The calculation is similar.  Just be aware that not all power sources may be included in this rating so you may have to include motor horsepower of the evaporator fan.Also be aware that both of these ratings are at specific conditions.  Much like the mpg of your car, your actual usage will vary considerably based on how much it is used and the conditions of the inside and outside air/water the unit has to work with.Much larger commercial systems (heat pumps and chillers) becomes much more complicated.  Even for medium sized commercial calculators, you may want to try this one out:http://www1.eere.energy.gov/femp...Written Estimating Power consumption (1.5 ton Non Inverter AC)The AC's power consumption depends on its star ratingListed below is the BEE star rating chartThe EER is calculated by the following formulaCOP = amount of heat removed in W/ power consumed in WEvery 1 ton of cooling power (commonly known as heat removed by a 1 ton AC in one hour) is also expressed as 3500 wattsHence 1.5 ton AC will be rated at at least 5275 WattsWe can calculate input

wattage using the above chart for various star ratingsThus if 5 star split ac with 1.5 tons cooling capacity is rated for 1507 watts it will consume 1507 watts per hour1000 watts per hour is one unit of power consumedThus the AC will consume 1.507 units per hourYou can apply the above calculation for any AC - but only for non inverter ACsThis is rated input power which is just calculating power usage when compressor is runningUsually during an average 8 hour usage the AC compressor runs about 70 percentSo an Ac rated 1000 watts will in practical terms consume 5600 watts in 8 hours of operationThe Inverter AC with EER of 3.5 and above if used, will consume a further 20–30 percent less power if used over 6 hours timeThe Inverter AC consumes slightly more power in initial hours to bring doun Temp of RoomRefer to Vivek Ravindranath's answer to How much power will a 1 ton inverter air for more detailsWritten All A/C units have a tag on the compressor, already with the calculation much electricity usage it takes.