NOTE: When calculating AC efficiency over 16 SEER, you will get replacement cost for Central Heat Pump systems, instead of regular Central AC. Besides flexibility, mini split systems offer a far superior energy efficiency compared to central AC systems. You can get the smallest below 1 ton units (9,000 BTU mini-split) for as little as $2,400 (that includes the installation). text-align: left; We will get into these below, and show you a more accurate way to do the estimate. .DarkTabForm { What is more, if they do break down, HVAC installers will know how to repair a Goodman, Trane, or Lennox central air conditioner. If your house is well insulated and energy efficient, you can estimate down. The smallest AC unit 1 ton (12,000 BTUs) costs $1,300 $1,700. The Best Energy Efficient Air Conditioners of 2023 - Picks from Bob Vila Trane Technologies is one of the oldest and best-known HVAC brands. The 2.5 ton MXZ-3C30 can deliver 28,600 BTU/hr @ +5F if it has the right heads/cassettes (~27K if all mini-ducted.) However my recommendation would then be to get two 4-zone Fujitsu ductless mini split systems (36K each). margin: 30px -5px 35px; Start Here - Enter Your Zip Code, See more about Remodeling Calculator team here. 2nd and 3rd is 2000 sq ft per. The guy is not a magician and has no way of making a real estimate without using professional software. On average, homeowners report spending $3,900 5,000 to install a 2.5 ton central air system in a house that has functional ductwork. Kathleen your AC running for under 30 minutes with a cover on it is no fiasco. Champion Cooler. The best course of action is to hire a licensed installer who has a comprehensive, professionally designed HVAC calculator. This primarily depends on SEER rating and if you already have HVAC ductwork. padding: 30px 10px 40px; Both significant health problems. 3 ton AC units is capable of generating 36,000 BTU of cooling effect. While the unit is often less costly than other whole-house systems, installation makes up more than 65% of the total costs, so these units are much more expensive once installed. Ductless mini split systems provide targeting cooling (and heating) to a single room or a large area. Here is are the basic estimates of what area can 5 ton AC units cool down, depending on the climate: 5 ton units are one of the most expensive central air conditioning systems simply because they are bigger, need extensive installation, and can cool down larger areas. HVAC Size Calculator: What Size HVAC Unit Do I Need? We live in North Tulsa County OK. Our home is 12 yrs old. I love your info. } Obviously, these are rough estimates and you have to check with your local HVAC guys for the precise pricing. South- or west-facing homes typically take longer to cool because of heat from the sun exposure during the summer. font-weight: 600; They have a big HVAC department as well. They should be checking and recording on your invoice the condition of electrical connections, contactor points, the microfarad rating on your capacitors compared to the actual reading on a meter. display: inline-block; A 2000 sq ft house has a maximum requirement of 30,000 BTUs. Energy-Efficiency Of Central Air Conditioners (SEER Rating). or more. } If they find anything unsatisfactory have them show you and explain it to you. 12,763 satisfied customers my wife and i purchased a 3000 sq ft including basement 1964 my wife and i purchased a 3000 sq ft including basement 1964 ranch style brick house in winston salem,nc. You can add cooling output by installing 1 ton (12,000 BTU) window or portable AC unit, for example. An undersized unit will run overtime to reach your desired home temperature and consequently cause your unit to wear out quicker. Heat transfer between walls and through the concrete slab, Costs more upfront you can overspend by about $800+, Doesnt get rid of humidity as well as a properly sized unit, especially in very hot climates, Cycles on and off many times throughout the day, thereby creating more wear and tear on the unit, Will not keep your house at a comfortably cool temperature on the hottest days, Running all the time instead of cycling will drastically increase your electric bill. font-size: 23px !important; He didnt know my husband covers our compressor every fall to keep out debris, leaves, wet, etc. Generally, its best for any HVAC or air conditioner to have 20 BTU per square foot. The original installer was an alcoholic who did a poor job of installation. Ask them the condition of your condenser coils and your evaporator coils. Moving Air Conditioner Unit Cost | MyCoffeepot.Org from media.improvenet.craftjack.io Unit sizes go up in half ton air conditioner room size calculator. Right? Well, for one, many of them have been in the business of producing air conditioners for 30+ years. Better than builder grade insulation batts in walls and blown in attic insulation, not skimpy. We suggest having the inspection complete rather than simply replacing your old HVAC unit with the same size system. Average 1-6 Person Home kWh Usage, Gas Vs Electric Water Heater Monthly Cost Comparison (State-By-State), Water Heating Costs For 1,2,3,4,5,6 Family Homes (State-By-State Analysis), Electric Water Heating Cost, kWh Usage Per Month (State-By-State RECS Analysis), What Is W2 Wire On Thermostat? SEER = (1 EER100% + 42 EER75% + 45 EER50% + 12 EER25%)/100, Total Heat (BTU/hr.) It has a 2 ton unit for upstairs and a 2 ton unit for downstairs. Plan 120-267. Our product reviews and recommendations are researched and backed by real buyers and industry experts, not dictated by our partners. width: auto !important; Rather, size is a measure of its capacity to generate cool air. Tonnage is the basic measurement of central air conditioner capacity. color: #fff; Over 40% of all HVAC systems, including central air conditioners, fail due to incompetent, hack job installation. Especially if you are willing to spend extra money on a premium brand name AC unit, such as Carrier, dont try to squeeze a few hundred dollars of savings by hiring a sub-par installer. These rooms will require more BTUs to cool down. Would you round up to a 5 ton unit? They are very useful in cases when 2 ton AC is not quite enough powerful and a 3 ton unit would be overkill. } width: 100%; The new highly energy-efficient air conditioners you will find in the table below can have a 20+ SEER rating. They offer 3 lines of Energy Star rated central AC units: Trane central air conditioners have two proprietary features that set them apart from the competition. Choosing the right size air conditioner for your home requires more than knowing the square footage. We will also show you how to do a DIY estimate to figure out the right size for your central AC unit. To control the thermostat, Lennox has developed Lennoxs iComfort S30 Ultra-Smart smart feature that enables the connection of the thermostat to a smartphone. Costing more to run will depend on your thermostat setting. On the down side, if you install this advanced, higher efficiency AC, you may not see the payoff for many years. Based on rough estimates, here are the basic square footage list for 4 ton units: Because they are bigger, they also cost more; the unit price, as well as installation, is pricier. When we will go through all the best central air conditioner brands, you will see the cost of installed units. The Hisense AW0822DR1W window air conditioner with heat is best suited for smaller rooms (350 sq ft or less), delivering 8,000 BTU of cooling power and 4000 BTU of heating power. As another example, to cool a two-room apartment (living room and bedroom) of 800 sq/ft, you would need a 16000 BTU air conditioner. They offer these mini-split lines in 2021: The key to extremely high energy-efficiency is the incorporating of Mitsubishis inverter compressor that is controlled by Kumo Cloud controller. display: block; LG LW8016ER 8,000 BTU 115V Window Air Conditioner 2. I installer recommended a 2 ton unit. padding: 10px 0 0 0; The newer central AC brands try to complete with, most predominantly, lower prices of the central AC units themselves. .DarkPrice { A 3000 square feet showroom is available at a price point of Rs 3,30,00,000. . The best 2 ton AC units can cost between $1,500 and $5,000 (with installation). How Much Does Central AC Replacement Cost In Clearwater, FL? House square footage/ AC unit size estimate, 1,500 sq. The industry standard for central air conditioning units is that they begin from a minimum size of 1.5 tons and get larger in half-ton sizes.So, 1.5-ton, 2-ton, 2.5-ton, and so on For a 3000 square foot home, you're likely going to need a larger system. 60,000 BTUs 5 tons. Lets presume that you will run an AC for 1000 hours (8.5 h per day for 4 summer months) and that the average cost of electricity is $0.1319 kWh (national average). They have been in business since 1924 (close to 100 years now), and have made quite a few very successful series of central air conditioning systems. float: left; Some high-end 5 ton Trane air conditioners can cost more than $10,000 (complete with installation and ductwork). ft . background: #ff6d19 !important; margin: 0 10px 0 0; Compare Quotes From Top-rated Air Conditioner Installers. Most residential air conditioners range anywhere from 18,000 to 60,000 BTUs. .DarkSubmit { Once you determine your climate zone and schedule your Manual J inspection, its time to choose the best HVAC brand.Once you know the size unit you need you can start comparing different leading products that are the same size keeping your price estimate right on the money. The SEER rating is the single most important specification when picking a new central air-con. font-family: 'Raleway', 'Open Sans', sans-serif; 700-1000 square feet = 18000 BTU per hour 12. The chart below can guide your BTU choice: The larger your home, the higher BTU you'll need to support your comfort. text-align: left; Tankless Water Heater Breaker Size Calculator: What Size Breaker? On the other hand, installing a central AC that is too small will not keep your house cool! 48,000 BTUs 4 tons The company keeps telling me its not made to cool to 75 in 100+ temperatures but ive never had this issue and been here since 1996 (Note: Had new blown insulation in 2016). 10. Your average energy saving from replacing a 9 SEER AC with a 16 SEER ac will be $450-780 / year, plus you can get Energy Efficiency Rebates in most states! (Calculated), AC Compressor Replacement Costs In 2023 ($700 to $3,400), 12 Most Energy-Efficient Portable Air Conditioners In 2023 (Based On EER), MrCOOL DIY Mini Split Reviews: Exactly How Good They Are? Before we get into sizing a residential central air unit, lets take a quick look at pricing. .DarkZipBox { Nearby homes similar to 2303 17th St NW have recently sold between $2M to $2M at an average of $555 per square foot. Even before purchasing a central air conditioner, it makes sense that you get the key information you need and talk to HVAC people competently (and not get fooled into choosing overpriced and malfunctioning central AC systems). Average Heat Pump Costs by Type Get Estimates from Heat Pump Experts in Your Area Typical Price Range: $3,500 - $7,500 Get Free Estimates (std. 11 years is a bit on the low side, hope your next central AC survives for 20+ years. Size: Air conditioner capacity is measured in British Thermal Units (BTUs). Air conditioning cost with installation for a 1,000 sq ft house can cost anywhere from $2,000 to more than $10,000. display: block; (Looking for how to properly size a window AC?). They are usually used as small house air conditioners. number of people in your home Heres how much would these two AC units spend during 1 summer season: As you can see in this 14 SEER vs 20 SEER comparison, the more energy-efficient central air conditioner will cost about $100 less every season. We allowed the compressor to cool completely before turning it on to cool off our too hot native Minnesotan. They offer two lines of central air conditioners: The GSXC20 is Goodmans newest and best model. The outdoor cabinet is typically placed on a concrete slab outside the home. color: #fff; Dont settle for a ball park estimate based on a quick visual assessment, as it will not be accurate. Calculator + Chart (Natural Gas), Average Gas Bill For 1-Bedroom Apartment: State-By-State Cost Analysis, Average Electricity Bill For 4 Person Household (Survey Analysis), How Many kWh Per Day Is Normal? padding: 5px 0 0; number of heat generating appliances Mitsubishi is the oldest HVAC company. DC Wire Gauge Calculator: What Gauge Wire (12V, 24V, 48V)? This duplex plan gives you cottage curb appeal and two units, each with an open floor plan, three bedrooms, and a two-car garage. font-size: 30px; The national average is thus $5,638. The information and savings numbers depicted above are for demonstration purposes only, and your results may vary. Thank you for taking your time to advise us. 3,000 Square Foot Duplex Plan. However, the high energy-efficiency units (that make a smarter and eco-friendly long-term investment due to energy-savings) can cost up to $5,600. Use the following conversion information to determine your existing system size (use the system model number NOT the serial number) 18 = 1.5 tons. The company Mitsubishi Group is a global conglomerated. I have a 1996 sq ft 2 story home and just had the outside unit replaced. It is like buying a 5 Amp power supply to power a 0.5 Amp device. .DarkTabMSG { I cant see the brand or SEER rating due to that famous cover on the outside compressor. Take this number of square feet and divide it by 600. } } If there is poor insulation/efficiency in your home, its best to estimate higher tonnage. .DarkAvg { There are 12,000 BTUhs in one ton. Furnaces are the most common type of heating system and work by forcing air through your home's ducts and vents to warm the house. 1 Ton = 12,000 BTUs per hour, or the amount of energy it takes to melt 1 ton of ice in a day. One-stage systems are the most common, and only operate at a single speed. 18,000 BTUs 1.5 tons The only loss is a little bit in the line set, but its the same for central systems. Anything bigger, requires a commercial roof-top AC, which are in most situations not suitable for residential use. A Manual J calculation is like an energy audit of your home. Other FAQ about central air conditioners such as how long does a central air conditioning unit last, what is the ultimate best SEER rating, and who to call for central AC unit installation. . width: auto !important; display: block; .DarkPrice { . $1,695: $3,345: 2 tons: 1000 - 1300 sq. I bumped up to a 31/2 Ton mainly because of the den. Cannot tolerate heat. Heavy-duty generators for home and construction sites can deliver more than 10,000 watts. While we work hard to provide accurate and up to date information that we think you will find relevant, Forbes Home does not and cannot guarantee that any information provided is complete and makes no representations or warranties in connection thereto, nor to the accuracy or applicability thereof. 450-550 square feet = 12000 BTU per hour 11. Air Conditioner Size Calculator accurately estimates the size in Tons & BTUs, as well as Cost to Install Central Air in different climate zones (regions), based on your house size and AC SEER rating, house size, heat load and other parameters. Expect to need 60,000 BTU. Here is another very quick and basic way to figure out the size of an AC unit based on the number of square feet in your house. You can your local HVAC company, ask for some quotes, and they will recommend you the central AC unit to use as well as calculate the coverage area you need, ductwork, and so on. While your mini split equipment may not look as attractive as invisible central air, you need to consider that you have a significant loss energy in the ducts of a central air system. What Size HVAC Unit Do I Need? | Calculate Furnace Size - Trane font-weight: 400; .DarkTabForm { The summary at the bottom is definitely great so they can work with a local installer and use a brand and model supported by the installed. Ft. 1845 Irving St NW, Washington, DC 20010. Rheem Manufacturing is a US company, based in Atlanta, Georgia. By choosing an HVAC size based on square footage alone, you may purchase a unit thats too small or large for your needs, and that can come with a hefty cost. Failing to choose the right central AC unit for your home can result in: Ultimately, you cant be without a right and properly functioning central air conditioning system when the summer heatwave hits. When we remodeled 28 yrs ago we added a den, bed room and bath. The U.S. Department of Energy offers a guide to help homeowners easily determine their climate zone. If you need to repair your central air conditioner, you would like for HVAC guy to have some experience with that brand. Furnace for 2,100-square-foot house: 63,000 to 126,000 BTUs Furnace for 2,400-square-foot house: 72,000 to 144,000 BTUs As you can see, the BTU usage recommended for each house size is not a single number but rather a broad range, so square footage alone is not particularly helpful. The only reasons you dont want a larger size unit is because it costs more upfront. When estimating your air . Ft Home: $5,205. In short, when in doubt, always go for a central air conditioner with a higher SEER rating. Currently, it employs about 30,000 people and generates more than $8 billion in annual sales. Commissions do not affect our editors' opinions or evaluations. Lets look at the most well-known ones, compare their models spec-by-spec, and get to know them a bit. The overall total average for a standard unit and installation together is around $4,500 to $8,000. This is the only way to avoid choosing a bad central air conditioner or get swindled by buying an unnecessarily pricy unit. } In HVAC lingo, this is known as tonnage. Showroom in Sen House for Showroom Property for Sale at 3.3 Cr. In addition to being a contributing writer at Forbes, she writes for other leading online home improvement, DIY, and garden media outlets and online retailers. } The company gets far fewer repair calls for its' AC systems than most of the other AC units in the business. Did you say there is a tax credit for replacing our HVAC? Very helpful for those who want to be a expert ac technician. Low-end central air systems cost around $3,800, while high-end ones cost $7,500. The average cost to install central air conditioning in a 2,000 square foot houses is $7,800 for a 3.5 ton system The average cost of new central air for 2,400 square foot houses is $8,600 for a 4 ton AC system The average cost to add central air in a 3,000 square foot house is $9,300 for a 5 ton system Those AC prices are way too high! The 1-ton units are very rarely installed as they are too small for a CENTRAL AC application. float: left; 4 ton AC unit costs $2,500 $2,900 Despite the same dimensions, quality of insulation, ductwork, windows, and doors, the Michigan home needs a smaller tonnage unit than the house in Texas. I plan to get an AC system installation for my home soon because noon times can still get very hot in my area despite it being December. Lennox Central AC Prices 2023 - Central Air Conditioner Prices RA20 units are capable of achieving a 20+ SEER rating, are EcoNet enabled (Rheems proprietary smart integration feature), and have a powdered coat paint system. However, high SEER central AC systems are expensive, and are typically the more advanced Central Heat Pump type (18 SEER+ systems). Which are the best HVAC brands that produce central air conditioners? The price breakdown for 60 ft of ductwork, insulation, and 5 vents (standard ductwork) will include: This is for a $2,000 complete ductwork. Alas, it is not immortal. The chart below can guide your BTU choice: The larger your home, the higher BTU youll need to support your comfort. AC units are not all created equal. For central, I recommend central heat pumps, which also provides efficient heating in the winter. the outside edge is 10 ft high then it goes up a little over 12 ft. Because of the high celling and the open beam it was suggested we have two registers and a return at a nearby hall way .this still remains the warmest room in the house. Here is the full structure that will get you acquainted with ins and outs of central air: There is quite a lot of material to go through here. Hope this helps. Our service company has always complimented him on the cleanliness of the compressor unit, saying it help it work efficiently if not full of leaves, debris. } .DarkSubmit { @media screen and (min-width: 640px) { Basically, even if the outdoor temperatures are above 100 degrees, you should be able to cool your home to 72 degrees, if you have sufficient cooling output. According to the Environmental Protection Agency, multiply your home's square footage by 20 to determine how many BTUs you need.Central ACs are usually sold by the ton. in Kankurgachi, Kolkata. . In almost all cases, it pays off to pay a little more for an established HVAC brand that has extensive experience with producing central air conditioners. Other low-end smaller 2 ton central air conditioners can cost as little as $2,000. These machines are designed to handle even the most opulent home, guaranteeing the comfort of everyone inside throughout even the warmest of months. They can cost $10,000+, have a complex installation process, and even the best central AC unit can leave you sweating in the summer if its not properly sized to your home. For more estimates, you can also use the AC tonnage calculator here. The most popular central AC size that works for the majority of residential homes is either 2 or 2.5 ton unit. Goodman units are considered to be reliable, durable, albeit the older models are less energy-efficient. Total newbie to central air, but my current unit has lasted for 11 years. Therefore, it only makes sense that your inputs were off. } Here is a shortlist of the best Energy Star-rated 2 ton AC units by renowned central AC brands: Lennox produces the 2 ton AC units with the highest 26 SEER rating. In most cases you can use the conversion information below to help in determining the size of your existing air conditioner system (use the system model number NOT the serial number) 18 = 1.5 tons 24 = 2 tons 30 = 2.5 tons 36 = 3 tons 42 = 3.5 tons 48 = 4 tons Also keep in mind, that its much more efficient to fix air leaks, insulate, etc., than to oversize your HVAC system. Here is a list of the best 4 ton AC units with the highest SEER rating in 2021: Carrier and Bryant create the most energy-efficient 4 ton AC units with a 21.5 SEER rating. To keep your family comfortable and avoid bank-breaking energy bills, were introducing the best way to answer, What size AC unit do I need?. HVAC AL #08093 REF AL #52466 So the new formula looks like this: ((2,350 x 25) / 12,000) + 0.5) = 5.39. So you would want to install a 3.5 ton unit. font-weight: 500; They are, however, a very good choice when 3 ton units are not strong enough and 4 ton units might be overkill. As far as I can tell 908 sg ft is the original house and only has the blown in insolation. font-size: 22px; You'll also see AC size measured in tons, which uses smaller numbers to express a unit's BTU output. Most homeowners would obviously prefer to pay less for a central air conditioner. How many HVAC Units does My House Need?, Air Conditioning Repair for The only reliable way to determine the size that best matches the needs of your home is to have your local Lennox Dealer perform a load calculation, which takes into account the square footage of your house, the insulation value of your windows, the amount of insulation in your walls and roof and many other factors. For a home that is 3000 square feet, you will need an AC unit that is at least 4 tons. To get a truly accurate size for central air that will work most efficiently in your house, you need to do a professional load calculation, known as the Manual J. Do You Have HVAC Ducts In Place That Will Accommodate Central AC? Window air conditioners: Ideal for use in individual rooms. margin-bottom: 0; Central AC units are made in a variety of sizes or capacities. 2 returns in house with anti allergy filters changed regularly according to recommendation. However, it is important to realize that because there are so many factors that may impact this calculation, you will most likely not be able to take them all into account properly. Single-pane windows are less energy-efficient than double-pane, triple-pane or low-emissivity film-coated windows. Central air conditioners cost $3,800 to $7,700 An example of this is turning a light switch on and off. Single-zone and multi-zone systems are available and best serve homes where a different temperature is desired in specific spaces. fireplace, sunroom, etc. Get a unit thats too small, and youre home wont be properly cooled or heated. However two elderly people with serious medical issues running around in the middle of the night turning off thermostats and untying covers could accurately be described as such. Do keep in mind that those costs are only rough estimates with quite a big range; the price of central air conditioner and installation does vary from state to state, from home to home, and from brand to brand. They can generate 48,000 BTU of cooling output and are usually powered by 3,000+ watt power sources. } There are two types of Manual J calculations ( whole house and room by room) and your contractor will decide which one is best to do, depending on your particular situation. Installing central air for a 2,000 square foot home costs $3,100 to $7,800 or more. The total cost of any central air conditioner is primarily comprised of 3 factors: When we talk about how much does a central air conditioner costs, we talk about the unit + installation. width: 43%; It almost certainly did not cause any lasting harm to your equipment. 2303 17th St NW, Washington, DC 20009 | MLS# DCDC2086330 | Redfin Multi-zone mini split systems go as high as 24 SEER. Coverage-wise, 2 ton is enough to cool down: The best 2 ton AC units can cost between $1,500 and $5,000 (with installation). air). In those times, bigger really was better. If you live somewhere in Rust Belt, you will need at least a 3 ton central AC unit to properly cool your home during the heatwave. We also participate in our electric companys energy rebate program which connects our smart thermostat to them so on highest usage days so they turn off our unit for brief amounts of time as necessary to manage power grid efficiency in exchange for percentage off bill. We had offered to turn on the AC for him but didnt anticipate he would do it without telling us. Here are all the current Lennox Energy Star rated series of central air conditioners in 2021: All Lennox central AC units have a 1/2 degree thermostat preciseness. its like a rectangle measuring 17.5 x 19.5. the celling is on the longer side of the four walls. ft./3 tons The inside was replaced in 2017. Here are unit prices for different tonnage (prices do not include installation): 2 ton AC unit costs $1,700 $2,200 Thats it! Being on a fixed income with inflation and high medical bills means stretching our budget and doing without services we need. What Size Ac Unit for 3000 Square Feet - Katynel 4 Beds. Today electricity is very expensive (anywhere from $0.12 / kWh in most southern states to $0.25-$0.45 / kWh in CA, MA, NJ, and most of New England) and you dont want to waste it on running central air that is too big. padding: 10px 0 0 0; ), Home features that modify internal temperatures (i.e. } SEER is a way to rate the energy efficiency of air conditioners. font-size: 19px !important; NEC 310.16 Table: Copper And Aluminum Wire Ampacity Chart, NEC 310.12 Table: Wire Sizes For 100-400 Amp Services (83% Rule), kWh To Therms Calculator + Conversion Chart (1 kWh = 0.03412 Therms), MMBTU To Therms Calculator + Chart (1 MMBTU = 10 Therms), Therms To MMBTU Calculator + Chart (1 Therm = 1/10 MMBTU), AWG To Circular Mils Chart (For 4/0 AWG To 20 AWG). Do ductless mini splits make sense for a large house? One ton equals 12,000 BTUs. width: auto; Total cost of 5 ton units with installation starts at about $3,500 and can reach up to and even over $10,000. Total number of square feet is just one of these factors. Keep in mind if it is 80 outdoors the inside of your home will generally be several degrees warmer due to heat generated by people, appliances, etc. 5 ton AC unit costs $2,900 $3,500 ( a 5 ton unit is extremely powerful and is not required for most homes). We provide quality connections between homeowners who need HVAC help and top-rated pros who get the job done. For exact pricing, please request to compare quotes from HVAC companies near you. Replacing an HVAC system for a 2,000 square foot house costs $6,000 to $12,000. Buying a Mitsubishi mini-split will set you back anywhere between $2,900 and $6,100 (the cost of installation is included in this rough estimate). Best Modem Router Combo For 3000 Sq Ft House (2023 Updated) In 2021, they offer the most extensive portfolio of central AC units. float: left; To illustrate the electricity costs associated with the central air conditioners, lets compare the energy expenditure and cost of 14 SEER and 20 SEER central AC (3 ton units).
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