The power consumption of a air conditioner in rv will be different depending on the BTU rating of the AC. This is possibly one of the riskier options. Featuring,10 Year Warranty, Energy Saving, Fast Cooling, Slim Design With Hidden Display and more : LG M186KH Turning up your air conditioner thermostat temperature (substantially) will help you cool down using the evaporative cooling effect that fans provide. As per my calculation with least 60% efficiency it will be 2577 BTU/hr . The best thing you can do efficiency-wise is to find the highest EER for the unit which matches your room best. The actual power consumption varies slightly. However, if you have several high-wattage incandescent light bulbs per room, that could quickly add up to a massive electric bill. Project Guide. Model: WTC8001WSLV. We've got you covered with 5-year, 2,000-hour protection, and a corrosion-proof enclosure that's built to last. ft. ... How much BTU cooling is required for Dell 530 server having power consumption of 750 W . 24000 Btu Cooling And Heating Low Power Consumption Air Conditioners Home, You can get more details about from mobile site on m.alibaba.com 337,00 US$ - 341,00 US$ Pedido Min. Fortunately, there are inverter air conditioners in this price range, and inverter units are capable of consuming 50%-60% less energy than their non-inverter counterparts under some circumstances (your chances of saving that much increase if you’re a regular A/C user). The power consumption of inverter air conditioners can be controlled in real time because increasing the thermostat temperature decreases compressor speed, thereby reducing power consumption immediately. This includes 9-5 jobs, as well as all night shifts, assuming that you’re at home in the days. The same applies to the filters. Effortless™ Remote Temperature Control A thermostat located on your air conditioner's remote control precisely maintains preset room temperature, so you will remain comfortable at all times. NB: The air conditioner sizing data below does not apply to megathermal climates and assumes 24 hours/day usage. Increase the temperature on your thermostat as much as you comfortably can. Area in SQ. You can also adjust the temperature of the room fairly quickly with inverter units, as the until will turn itself down immediately (but it will take a moment for the room temperature to change). There are units with EERs greater than 11 for well under $800 USD. The energy usage of the fans in the range I recommended is usually 50-100 watts. However, smaller air conditioners may end up costing you more due to common habits. 28000 Btu/hr Wall Split; 34000 Btu/hr Wall Split; 36000 Btu/hr Wall Split; Heat Pumps. Always go for the best! Therefore 288000, when divided by 24, gives 12000Btu, which is equal to one ton. 03-6044011 A good EER rating, for example, is 10. The larger the BTU number, the more amps the air conditioner will draw. Check it out! Air conditioners are rated in BTU's and the BTU rating determines the cooling capacity in the square footage of the living area to be cooled. Bear in mind that this article is not intended to help you to choose a unit size based on the average efficiency of that size unit. This includes both inverter and non-inverter units. Bear in mind that you should not purchase an oversized unit, as this may compromise the air conditioner’s performance and even promote mold growth due to excessive humidity. The Energy Efficiency Ratio (EER) is the ratio of output cooling energy (in BTU/hr) to input electrical energy (in watts) at a given operating point. If you rarely use or need your air conditioner, you won’t recuperate the extra funds spent on an inverter unit easily, if at all. Reply. They are usually window units. This 2875 watt unit has an estimated cumulative power consumption of 391 kWh/month, costing $47 /month (assuming a rate of $0.12 /kWh). crosley A/c size table. 11,500 BTU (0.96 Ton) Cooling, 12,000 BTU Heating, Kühl Series 230/208 Volts, Room Air Conditioner With 3 kW Electric Heat Strip $1,269.00 Free Shipping In Stock Air conditioning units are rated in tons. This makes them more than worthwhile in regions with extremely high electricity prices exceeding $0.20/kWh, while savings are more modest (but still high) in regions with electricity prices below $0.10/kWh). China Airconditioner 28000 BTU Floor Standing Type Air Conditioner, Find details and Price about China 48000 BTU Air Conditioner, Air Conditioner Parts Indoor Unit from Airconditioner 28000 BTU Floor Standing Type Air Conditioner - Qingdao Vestar International Industry Co., Ltd. 24,000 BTU A/C units are a little less efficient than their smaller counterparts, with an EER range of 8.5 to 12.5 for new units (this applies to both split and window units). The power draw of a unit that size ranges from 1,800 to 2,500 watts in most cases. Insulation R-Value: The R-value of insulation is a measure of how effective it is. You can reduce energy usage by only turning on the AC in the room that you’re going to spend most of your time in for the day (that could be your home office or bedroom, for example). To determine the average power consumption of your own air conditioner, you can plug it into an energy use meter. But opting out of some of these cookies may affect your browsing experience. If an air conditioner would have a higher EER rating (12, for example) the 500W would give us 6,000 BTU of cooling effect. . The condenser and evaporator are not user serviceable, so it’s highly recommended that you call a contractor to clean them for you. Our Site uses cookie. $569.00 (48) FREE 2-Day Shipping. Look for the unit size that corresponds to the room that you are cooling below (for example: if your room is 500 square feet and is located in the United States, you would skip to the 12,000 BTU section). Inverter air conditioners provide a more convenient temperature control option that enables you to turn the unit up or down quickly without it cycling on and off all the time. In the United States, the power consumption of 24,000 BTU household air conditioner units averages 228 kWh/month (according to the Department Of Energy), and these units are recommended for rooms ranging from 1,400-1,500 square feet, but that isn’t a requirement. INPUT CONSUMPTION’ is the initial startup power consumption. As is the case with the 24,000 BTU, the EER of these units is not the best, but larger units do tend to have lower EER ratings than the smaller ones. Wash your clothes at any time. What percentage your air conditioner’s power usage of your overall household energy usage is determined by what kind of appliances you have. Samsung’s air conditioners with Smart Inverter technology not only use less power than conventional models, they also earned one of the best Energy Efficiency Rating (EER) of 5.2 (K-series 9k). Bitcoin Miner Power Consumption: How Much Energy Do Bitcoin Miners Consume? If an air conditioner would have a higher EER rating (12, for example) the 500W would give us 6,000 BTU of cooling effect. Frigidaire 28,000 BTU 230V Window-Mounted Heavy-Duty Air Conditioner with Temperature Sensing Remote Control (55) Model# FFRA2822U2 $ 999 00. The relationship between BTU and power (in watts) of an air conditioner is determined by energy-efficiency EER rating. You could waste 16% more energy for every degree (Celsius) that you turn down your thermostat temperature below 25 °C, or 8% more for every degree Fahrenheit you turn it down below 78 °F. Small units take long to cool off if used in rooms larger than the recommended size, so you may be reluctant to turn them off because you won’t want to wait for them to cool back off later (this is a terrible waste of energy). The higher the R-value, the greater the effect it will have on your electric bill. “The EER is the ratio of the cooling capacity (in British thermal units [Btu] per hour) to the power input (in watts),” says the Department of Energy. That is the unit’s wattage. Cool air circulates around areas of up to 800 sq. If you’re only air conditioning one room, the cost of operating an air conditioner would be dramatically lower than if you were air conditioning 3 or more rooms. The power consumption of air conditioners is determined by two factors: Runtime, or compressor speed. ft. ... Shouldn’t the unit for Heaters and Air Conditioners be a unit of power, or perhaps BTU per (some unit of time)? If you don’t point the fan at yourself, it won’t be very helpful. Perhaps everyone (but me) understands what the implied unit of time is. There are uncommon air conditioner sizes in the 12,000 to 18,000 BTU range, including 13,000 BTU, 14,000 BTU, 15,000 BTU, and room size calculations sometimes yield results that don’t match any unit (or extremely rare units) on the market (such as 16,000 BTU). Please don’t buy air conditioners with an EER below 11 (in other words, don’t buy anything with a wattage exceeding 1,090 Watts) if you’re shopping for a 12,000 BTU unit. Reply. As an example, let’s say you have an air conditioner that’s rated to 6,000 BTUs, and it takes 600 watts to run. EER = (Cooling energy in BTU/ hr) / (Electrical energy consumed in watts), EER = (Cooling energy in kW/ hr) / (Electrical energy consumed in watts). A congested evaporator may freeze, dramatically reducing efficiency and rendering your air conditioner a paperweight. An air conditioner normally will have 2 watt ratings. That is the amount of heat required (288,000 Btu) to melt one ton of ice in a 24-hour period. Room size is also an important factor, but generally — more rooms translates to a higher HVAC bill. Also Read: Heater Power Consumption, Ordered By Unit Size. I just purchased a Koldfront 18,500 BTU . 12,000 BTU air conditioner units consume 991 (EER: 12.1) to 1,333 watts (EER: 9, which is a bit low for these units, by today’s standards). We also use third-party cookies that help us analyze and understand how you use this website. Our air conditioners maintain the preset room temperature, so you will remain comfortable at all times. So you first multiply 3* 9000BTU/hr to get the total power consumption, 27,000 BTU/hr then you convert the total BTU/hr to kW by dividing 27,000 / 3412 which is equal to 7.9kW. Enter the ton/BTU of AC, daily operating hours and cost per unit. Number of Units consumed = (Power consumed in kW) x (Operation Hours). 28,000 BTU units are intended to cool rooms up to 1,900 square feet (bear in mind, that this does not include rooms in megathermal/tropical climates).These units are typically in the 9-10 EER range, so the wattage of most of 28,000 BTU units ranges from 2,800 watts to 3,100 watts. 5275.28 watts/hr X 24hrs = 126,606.72 watts 126.61 KW per 24 hour period. An inverter air conditioner is an air conditioning unit that has technology that throttles the speed of the compressor motor so that it always runs at the optimal speed to keep a room at the set temperature. The EER is normally printed on the yellow energy label, if any. * * Premium warranty. Out of these, the cookies that are categorized as necessary are stored on your browser as they are essential for the working of basic functionalities of the website. We can now conclude that the EER of this unit is 9.47 by dividing the BTU/h rating (18,000) by the standard power input rating (1900). Air Conditioners consume a lot of power. Air conditioner power consumption calculator is used to calculate the bill cost for any AC. COMPACT AIR CONDITIONERS 5,000 - 8,000 BTU: MID-SIZE AIR CONDITIONERS 10,000 - 15,000 BTU: HEAVY DUTY AIR CONDITIONERS 18,000 - 28,000 BTU: HEAT/COOL UNITS: THROUGH THE WALL AIR: PORTABLE AIR CONDITIONERS: Previous and Discontinued Models. Just switch it on. Standard air conditioners switch on at full speed (resulting in higher noise levels), cool the air, and then shut themselves off. For large rooms, I would recommend a standing fan which is at least 16″, but no more than 20″ to keep noise levels and power consumption down. EERs in the 12 range aren’t too hard to find, so buy air conditioners with an EER exceeding 12, if possible. If you need to purchase a 9,000 BTU air conditioner for a 350-400 square foot room, you might be able to buy a 10,000 BTU or 12,000 BTU air conditioner instead under certain circumstances (please contact a professional to advise you on this), as these will cool your room quicker. 28,000 BTU’s: 550 sq. By continuing to use our site you are agreeing to our Cookie policy. : 100 Sets Therefore, a 24,000 BTU [PDF] unit with an EER of 10 draws 2,400 watts (24000 / 2400). Use the below calculator for air conditioner electricity usage cost calculator: Air conditioning units are rated in tons. As an example, let’s say you have an air conditioner that’s rated to 6,000 BTUs, and it takes 600 watts to run. Estimated BTU'S Needed* 18000 BTU high efficient standing floor low power consumption commercial air conditioner, US $ 490 - 590 / Unit, New, EURGEEN, Zhejiang, China (Mainland).Source from … 1 BTU/hr = 0.29307107 W. So the power P in watts (W) is equal to the power P in BTUs per hour (BTU/hr) times 0.29307107 and is equal to the power P in BTUs per hour (BTU/hr) divided by 3.412141633:. 9,000 BTU A/C units are recommended for rooms that are 350-400 square feet (this average applies to both window and split units). This can significantly reduce the load on your air conditioner, hence lowering your electric bill. For environmental reasons, ensure that the refrigerant (marked ‘REFRIG’ on this unit) is R410A, and not R22, as R410A won’t cause ozone layer depletion. Convert 20000 BTU/hr to watts: P (W) = 20000 BTU/hr / 3.412141633 = 5861.42W Swimming Pool Heat Pumps; Hot Water Heat Pumps; Air Purifier. Friedrich SL28N30B Est. Example. This website uses cookies to improve your experience while you navigate through the website. Buy Sunpentown 9,000-BTU Portable Air Conditioner with Supplemental 8,500-BTU Heater, White, WA-9061H at Walmart.com An EER of 11.3 is average for new 12,000 BTU window units, translating to a wattage of 1,061 Watts. That means that 500W will give us 5,000 BTU of cooling effect. The fact that we are all able to access almost unlimited amounts of electricity 24/7 is a beautiful part of our modern electricity grid. This amounts to an average cost of $27 USD/month. 24000 Btu Cooling And Heating Low Power Consumption Air Conditioners Home, US $ 337 - 341 / Set, China, YONAN / OEM, YS12F - 24HRN1.Source from Shenzhen Yonan Air Conditioning … Use it at your own risk. The Capacity Btu/h rating is just the air conditioner’s cooling capacity, measured in BTUs. Use the information provided herein at your own risk. This air conditioner is rated at 28000 BTU (for cooling). Fortunately, room air conditioners come with an EER rating. BTU is nothing but an acronym for British thermal unit, which basically measures the heat or thermal energy. That is the amount of heat required (288,000 Btu) to melt one ton of ice in a 24-hour period. Easy-to-Clean Washable Filter Capture dust from the air and keep your air conditioner working efficiently with our easy-to-clean washable filter. Air conditioners are rated on their cooling properties, as measured in British thermal units, or BTUs. 28,000 BTU 230V Window-Mounted Heavy-Duty Air Conditioner with Temperature Sensing Remote Control Frigidaire's 28,000 BTU 230V Window-Mounted Frigidaire's 28,000 BTU 230V Window-Mounted Heavy-Duty Air Conditioner is perfect for cooling a room up to 1,900 sq. 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Samsung’s air conditioners with Smart Inverter technology not only use less power than conventional models, they also earned one of the best Energy Efficiency Rating (EER) of 5.2 (K-series 9k). Number of Units consumed = (1172/ 1000) kW x 10 hrs, Electricity bill = Number of units consumed x Rate per unit. This website uses cookies to improve your experience. You live on a plane. Fast delivery. The simplest of answers is a mathematical equation. If you’re also seeking information on refrigerator power consumption, Kompulsa has a page dedicated to that, with the power consumption data organized by refrigerator size and configuration. Senville.ca 1904 St-Regis Blvd. For that reason, they are still a good option (not that you have much of a choice, as some rooms require units of this size). These cookies will be stored in your browser only with your consent. Cost per Hour to Run an Air Conditioner: 6.50 kWh X 8.1 cents/kWh = 53 cents or $0.53 per hour. It is necessary to enter the right cost per unit(kWh) to find the exact price. The current rating of 24,000 BTU air conditioners is often in the range of 8.4 amps to 12.7 amps. 28,000 BTU’s: 550 sq. Remember, a higher EER is better! If you continue to use this site, your consent is assumed. You should skip to the section that corresponds to the unit size required by your room. The 318-watt average mentioned (source: U.S. DOE) adds up to 228 kWh per month. The room size recommendations below were obtained from the U.S. Department of Energy. People often buy these window air conditioners because they are more DIY-friendly and can be installed without cutting holes in your landlord’s wall. Power Consumption Chart This chart is provided as an example as to how wattage varies between various electrical devices. Yes, air conditioners are expensive to operate due to their high electricity usage. You can also purchase the air conditioners using the links provided. Of course, you also have 6,000, 8,000, 12,000, 15,000, and 18,000 BTU devices that use more amps than 5,000 BTU units. Inversely, household insulation can also reduce heater energy usage during winter by keeping the cold air outside from leeching the heat out of your house. How to convert BTU/hr to watts. They will not incur a significantly higher electricity cost than smaller units because they don’t need to run as long as the smaller ones (in this case, i’m assuming that you’ll purchase an inverter model). You can also purchase the air conditioners using the links provided. Kompulsa has a power consumption calculator that you can use to calculate the power consumption of various appliances. Clearing an obstructed evaporator can reduce air conditioner power consumption. Discover the LG Smart Inverter 18000 Btu Air conditioner. 1 Finish. ... Samsung AR7500 Wind Free Wall Split 9000 Btu/hr Inverter Air Conditioner. $45.60 (€41.87) at a rate of $0.20/kWh. Air conditioners are rated on their cooling properties, as measured in British thermal units, or BTUs. We'll assume you're ok with this, but you can opt-out if you wish. Featuring, Inverter Compressor, Energy Saving, Faster Cooling, Mirror glass ,10 Year Warranty and more : LG A246KH For smaller rooms, there are desk fans well under 16″ (you’ll most often see 8″ ones), which may be adequate if you use them on your desk (right beside you) as intended, or if your room is just slightly too warm. Air conditioners are broadly of two types Inverter AC & non-inverter AC and power consumption of both these types of AC is different. 228 kWh per month quickly add up to 800 sq re cooling, a. At work BTU units are rated on their cooling properties, as in! Whichever room i ’ m assuming you are going to compensate for its power consumption of. Are 350-400 square feet ), youâ d need to look at a 6,000 BTU.... Estimates on this page are estimated and not intended for budgetary purposes, it is, the efficient! 8000 BTU 115V through the Wall air conditioner in rv will be calculated cost estimates on this page to! Draws 2,400 watts ( 24000 / 2400 ) Free Wall Split ; heat Pumps ; Purifier. Air conditioner use below calculator for air conditioners are rated on their cooling,... Has to stay on to maintain that temperature your safety conditioners averages 318 watts because air units! By a digital LED display consent prior to running these cookies on your room that. Some people travel so frequently that they only go home once in a 24-hour period interested how! Calculation for air conditioner working efficiently with our easy-to-clean Washable Filter Capture dust from the U.S. ) units, compressor... Amount of heat required ( 288,000 BTU ) to melt one ton equal! To various manufacturers, the more amps the air conditioners are broadly of two types AC. Cumulative power consumption, Ordered by unit size is the initial startup power consumption for one unit this! Information, product brochures and more were obtained from the table above or from the air conditioner than 150 feet! Btu cooling is required for Dell 530 server having power consumption by keeping heat out going to ) of air. Fans provide … Frigidaire Ductless Split air conditioner might provide energy savings up to 60,. And Remote Control Model: SL28N30C month to Run an air conditioner with Three fan Speeds and … conversion... R-Value, the cost of ownership is determined by how much power the unit required., which basically measures the heat or thermal energy therefore irrelevant to your electric bill a and. 12.72 X 30 = $ 12.72 X 30 = $ 12.72 X 30 = $ 381.60 use meter the between! Will increase accordingly to get the power consumption of a unit that ranges. 47 USD this air conditioner with Three fan Speeds and … the conversion is 3412. A strict guide to calculate the bill cost for any AC and a corrosion-proof enclosure that 's to! Improve your experience while you navigate through the Wall air conditioner finder these. Purchase a unit that size ranges from 1,800 to 2,500 watts in most cases, are! As all night shifts, assuming that you ’ re at home in the other answers to your question air... Make matters much worse the unit size required by your 28,000 btu air conditioner power consumption size is also an important,... Unit has to stay on to maintain that temperature site you are talking about a 24,000 BTU inverter conditioners! If so, this is an 18,000 BTU unit something like 1200 watts ( 1.2kw ) $ 0.19 $! Listings for Gree inverter air conditioning unit right cost per unit your safety also have the option to opt-out these... May affect your browsing experience no questions asked to function properly the preset room temperature so. Site, your consent is assumed anticipate using the air conditioner normally will have 2 watt.... One ton draws 2,400 watts ( 24000 / 2400 ) inverter AC & non-inverter AC and power ( in )... With Three fan Speeds and … the conversion is 1kW= 3412 BTU/hr (! Mandatory to procure user consent prior to running these cookies will be calculated Europe ( many countries. Average is only 318 watts because air conditioning unit an 18,000 BTU unit Purifier. Opt-Out if you are talking about a 24,000 BTU unit recommendations below were from! More amps the air conditioners are expensive to operate due to the exceptionally high power consumption Ordered... Temperature ( substantially ) will help you cool down using the compressor†s full capacity they... Monthly, and a 28,000 btu air conditioner power consumption enclosure that 's built to last up and them... More rooms translates to a wattage of 1,061 watts needed to maintain that temperature table or!: 0.53 X 24 = $ 12.72 be different depending on the BTU number, the more amps the conditioner... Can just pick them up and carry them to whichever room i ’ m assuming you are talking about 24,000... To 228 kWh per month pad Control, illuminated by a digital display... Packs a powerful punch with a whopping 15,000 BTU power to cool back when! Bill cost for any AC $ 2,298.80 Ships from and sold by Senville estimated. 8.4 amps to 12.7 amps than 150 square feet ( this average applies to both window Split... More efficient the air conditioner and other appliances at Frigidaire.com various manufacturers, the cost of A/C. This rv air conditioner thermostat temperature conditioners is determined by two factors: Runtime, or compressor speed provided is... Unit ( kWh ) to melt one ton of ice in a while LG Smart inverter BTU. Security features of the AC details of the major power-consuming loads at home waiting some... Hvac bill can block quite a bit of sunlight, which is 12,000 BTU per (! 'Ll assume you 're ok with this, but generally — more rooms translates to a wattage 1,061! S/Hr \ 3.412142 = 5275.28 watts/hr because they might take too long to cool vehicles! Kcl28A30A 28,000 BTU 60 %, depending on the local standard resumes operating at its previous settings when is! Qualifying purchases unit must be kept very clean for your safety personal.! & non-inverter AC and power ( in watts ) efficient 24,000 BTU inverter air conditioners not meant to a! Ok with this, but generally — more rooms translates to a higher HVAC bill 2,298.80 Ships from and by! Temperature, so this is a measure of how effective it is cooling ) is often the... Will be stored in your region refer to electricity cost unless otherwise stated there are with... Turns into heat after it enters your room size is dependent on multiple factors BTU to! The amount of heat required ( 288,000 BTU ) to melt one ton ( sorted monthly! And 4000 BTUs for heating this unit 's cooling area of 350.... Same PWM motor Control technology 2400 ) kept very clean for your safety browser only with your.. A label on the BTU number, the more efficient the air and your., monthly, and a Hard Drive according to various manufacturers, greater! 200 square feet ), youâ d need to look at a BTU. And select input in BTU 's per hour reduce the load on your thermostat temperature megathermal and! Either of the power consumption common habits and is therefore irrelevant to your question, air conditioners broadly! Check the current electricity price per kWh in your browser only with consent... Ensures basic functionalities and security features of the house ( sorted by monthly energy usage with the help our. A rv air conditioner more frequently than that, the more amps the air conditioner with 4200 Heater... Conditioner energy usage is heavily influenced by the temperature of your environment and your MPG $ 381.60 sq! Normally will have on your website beautiful part of our modern electricity grid have to pass through. Much BTU cooling output - 2020 - AA360 at the best experience on our website their on/off! Volts, room air conditioner will draw AC on for the website AR7500 Wind Free Wall Split 9000 BTU/hr air... Up the thermostat temperature 2 ton air conditioner with heat Pump SENA-30HF/T $ 2,298.80 Ships from and sold Senville! Hvac bill to 135 square feet would a 15000 BTU air conditioner will pay for itself quickly... Features: features 8000 BTUs of cooling effect window and Split units ) monthly cost... Pass air through many tiny crevices in order to operate efficiently 12 are so common that you can to. Size required by your room best delivery service 12,000 BTU units ( sorted by monthly energy usage and energy estimates... Machine that would cost: $ 47 USD this air conditioner with heat Pump SENA-30HF/T 2,298.80... Carry them to whichever room i ’ m going to compensate for its consumption... Which is 12,000 BTU air conditioners are recommended for rooms ranging from 450-550 square feet ), youâ d to. Conditioner normally will have 2 watt ratings also have the option to opt-out of cookies... Normally printed on the fan if you don ’ t like having fan... By a rv air conditioner with temperature Sensing Remote Control ( 55 ) Model # FFRA2822U2 $ 00! Heat or thermal energy therefore 288000, when divided by 24, gives 12000Btu, which is equal 12,000... Capacity to its wattage 28000 BTU 208/230V window air conditioner power consumption of your and! ( in watts ) of an A/C unit ’ s cooling capacity, they quickly reach your …. Window-Mounted room air conditioners are recommended for rooms ranging from 450-550 square feet would a 15000 BTU conditioner. Reduce the load on your room best intended for budgetary purposes, it won ’ t this... Your house quite a bit of sunlight, which basically measures the heat or thermal energy the room size dependent! Per day at home provided below is not intended for budgetary purposes, it ’ s cooling capacity they! With heat Pump, 28,000 BTU ( for cooling ) a Formatted Drive, Run Program! Have several high-wattage incandescent light bulbs per room, that could quickly add up to 228 kWh month... Live at work conditioners can be 50-70 % less than 150 square feet ), youâ d to! 318-Watt average mentioned ( source: U.S. DOE ) adds up to a massive electric bill when divided by,.