8000 Btu Covers How Many Square Feet 9,000 BTU: 400 Sq. Is a 10 000 BTU air conditioner good?. An 8,000 BTU air conditioner will cool a 350 square foot room. Your first step is to figure out the area, in square feet, of the garage you want to heat. Another quick and easy way to estimate the number of BTU's required is with this helpful chart:. How big of a room will a 8000 BTU cool? Between 300–350 ft² or about 30 m². 14,000 BTU’s: 250 sq. To help you figure out what size is best for each room, you will need approximately 20 BTUs for each. A good general rule to start with for finding the right size AC unit is to have 20 BTU for every square foot of house. If your home is 1,000 sq ft and you want to heat it in the winter, then a 2-ton mini-split would be able to do so for you. Convert the square footage into BTUs: To calculate the estimated BTUs needed to heat or cool the room, multiply the room’s square footage by 25. Simply measure the length and width of a room and figure the square footage. 10,000 BTU (5,300 BTU, SACC*) Portable Air Conditioner cools spaces up to 450 sq. The size of spaces is measured in square feet or square meters. An 8,000 BTU air conditioner will cool a 350 square foot room. There are 12,000 BTUhs in one ton. Here are some general guidelines for choosing the appropriate BTU for your room size: 150 to 350 square feet: 5,000 to 8,000 BTU 350 to 550 square feet: 8,000 to 12,000 BTU 550 to 1,050 square feet: 12,000 to 18,500 BTU 1,050 to 1,600 square feet: 18,500 to 25,000 BTU. Those two numbers multiplied by. The U-shaped design blocks the noise coming from the compressor outside. Once you’ve got that, it’s time to shop around and make your HVAC pick. House Square Footage: BTUs Needed: 100 – 150:. For example, if you’re trying to heat 1000 square feet in a cold climate, 30,000 - 40,000 BTU’s will add significant warm air to your home. It has all the extras that you would expect to find in a large and modern air conditioner. How Many BTU of Heating Per Square Foot Do I Need? That’s an important question to get a right answer to. For example, the 5200 BTU heater room size is 170 square feet. Furnace size for a 3,000 square foot home range from 105,000 BTU to 180,000 BTU, depending on the climate zone you’re in. You will probably need more than 20 BTU if you live in sunny Texas or if you have lots of windows. Here is a table with calculated 3,000 sq ft furnace sizes for all 5 regions: We hope everybody will be able to use the furnace capacity calculator and get a good estimate of the size of the furnace they need for winter heating. For example, the Manual J calculation may say you need 25,000 BTUs for cooling. According to the US Department of Energy directive, an air conditioner’s most appropriate size would be 2,880 BTU unit. To size your mini split air conditioner, the most important thing you need to know is the square footage of the room you’re looking to cool and/or heat. Air conditioners are clearly labeled with the amount of BTUs they need. For multi-zone systems, you will need individual air handlers for each room, with the specified BTU. A BTU rating indicates the amount of heat an A/C can remove from a room. STEP 1: Determine how many BTUs of heating and tons of AC you need Method 1: Manual J Calculation The best way to determine the perfect HVAC unit size is to have a Manual J calculation done for your house. However, a few other factors can influence how many BTUs you need: Do you live somewhere with extreme temperatures? Does your home have older insulation?. If the temperature outside is 30°F and you’d like it to be 70°F in your garage, the desired temperature change is 40°F. The chart below is a great starting point for sizing your AC. How to Calculate BTU Per Square Foot for Air Conditioners. (Example 2) How large is your air conditioner?. 12,000 BTU is an Energy Star recommended size of AC for 450-550 sq ft areas. (Example 2) How large is your air conditioner?. Simple answer to ‘how many BTU per square foot’ is 20 BTU per sq ft. And in cold climates multiply the square foot number by 30 - 40. To find the cooling area for each BTU number, the BTU number is divided by 20, which is the standard number of square feet that one BTU can cool efficiently. To help you figure out what size is best for each room, you will need approximately 20 BTUs for each square foot of room space. If you live in a warmer climate, 40,000 BTU will heat more than 1,000 sq ft area. You get 1,800 sq ft * 30 BTU per sq ft = 54,000 BTU or 4. Air conditioner size for 500 sq ft is between 10,000 BTU to 12,000 BTU. 5,000 BTU: 200 Sq. 5 ton air conditioning unit can be used up to 2,000 square feet. The chart below is a great starting point for sizing your AC. (Example 1) What is the 5000 BTU air. House Square Footage: BTUs Needed: 100 - 150: 5,000: 150 - 250:. As a general rule, an air conditioner needs 20 Btu for each square foot of living space. 1 BTU = 1,055 joules, 252 calories, 0. The wrong sized ducts will cause similar problems to having an. According to the US Department of Energy directive, an air conditioner's most appropriate size would be 2,880 BTU unit. , you will to need multiply by the difference. Your first step is to figure out the area, in square feet, of the garage you want to heat. 30 BTU per sq ft = 270 sq ft; 8,000 BTU unit could cool down 270 sq ft room. When it comes to an 8,000 BTU air conditioning unit, it will generally be able to cool spaces from 350 square feet in size to 550. And in cold climates multiply the square foot number by 30 - 40. If you have a room that is more than 1,200 square feet, you can use a 2 ton air conditioner. What is the 8000 BTU air conditioner room size? Type 8000 into the calculator, and the answer is 400 square feet. What is a BTU? The British Thermal Unit, or BTU, is an energy unit. In more moderate climates, multiply by 20 - 30. For example, a 12000 BTU air conditioner will cool an area between. First you need to know how many square feet a ductless air conditioner can cool. Conversely, reduce the BTU by 10% if the room is heavily shaded. Quick & Easy Installation It includes a quick-snap bracket and can be installed in 3 simple steps. 3 Select an A/C unit with a lower capacity if you don’t have a lot of sun exposure. May 13, 2014. It is approximately the energy needed to heat one pound of water by 1 degree Fahrenheit. How Many BTU of Heating Per Square Foot Do I Need? That’s an important question to get a right answer to. An 8,000 BTU air conditioner is able to cool a 350 square foot space (the size of an average hotel room) in under an hour and comfortably maintain the temperature. Multiply the two together to get 150 square foot room. 3 Select an A/C unit with a lower capacity if you don't have a lot of sun exposure. When it comes to an 8,000 BTU air conditioning unit, it will generally be able to cool spaces from 350 square feet in size to 550. How to Calculate BTU Per Square Foot for Air Conditioners. For example, 10 foot high ceilings are 25% taller so you will need to increase your BTU total by 25%. How Much Should You Expect To Pay In Electricity Costs For Your Air Conditioner? Energy costs for running your 8,000 BTU unit depends on several factors. Let's say it is a 10 foot by 15-foot room. BLACK+DECKER BPACT08WT Portable Air Conditioner. The larger the space, the more BTUs are needed. 450-550 square feet = 12000 BTU per hour 11. Once you have the square footage, multiply it by 25 to get the BTUhs needed to. Sunlight – if the room gets lots of sun, add 10%. Obviously, if you live in colder climate, a 40,000 BTU heater will heat an area below 1,000 sq ft. A good general rule to start with for finding the right size AC unit is to have 20 BTU for every square foot of house. So a 1,000 square foot home would need a 20,000 BTU air conditioner. Department Of Energy recommendation for the size of room air conditioners: “…an air conditioner generally needs 20 BTU for each square foot of living space. Given that there's no ton unit indicated, we can use the estimation of 20 BTU equals to a square foot. Square Footage 100 - 150 150 - 250 250 - 300 300 - 350 350 - 400 400 - 450 450 - 500 500 - 700. You do that by measuring the length and width of the space, and multiplying them together. The largest mini split heat pump systems are ideal for 2,500 to 3,000 square feet. This capacity is measured in British thermal units, or BTUs. Simple answer to ‘how many BTU per square foot’ is 20 BTU per sq ft. Ideally, an 8,000 BTU-rated air conditioner will sufficiently cool the air in a room that measures anywhere from 300 square feet to 400 square feet. On the other hand, if you live in a 5,000-square-foot home, get a unit with 100,000 BTUs. BTUs, square footage, and more are key to helping you decide what size HVAC unit your home needs. 300 to 350 sq ft: 8,000 BTUs: 350 to 400 sq ft: 9,000 BTUs: 400 to 450 sq ft: For a 2,000-square-foot house, about 5 tons of air conditioning is best. 32 BTU per sq ft = 250 sq ft; 8,000 BTU unit could cool down 250 sq ft room. How to Calculate BTU Per Square Foot for Air Conditioners. 5 tons of air conditioning is needed for a 1,500 square feet room. 1 BTU = 1,055 joules, 252 calories, 0. The "5,000 - 60,000 BTU Cooling Area" table below shows how various values of BTUs can cool a specific area, starting at 5,000 BTUs and going up to 60,000 BTUs. For example, if you're trying to heat 1000 square feet in a cold climate, 30,000 - 40,000 BTU's will add significant warm air to your home. 8,000 BTUs will cover 200 sq. To do that you need to measure the length, width and height of the room so you can then calculate the cubic footage of each room by multiplying the length, width and height of the room. 20 BTU per sq ft = 400 sq ft; 8,000 BTU unit could cool down 400 sq ft room. How do I calculate what air conditioner size I need? To estimate the air conditioner size you'd need to cool a specific room:. Small rooms: A 7,000-to-10,000 BTU unit can effectively cool rooms up to 300 square feet. 5 tons or 42,000 BTU, since there are 12000 BTU per ton: In other words, to convert 1 ton of cooling to BTU, multiply ton by 12000. Window Air Conditioners / 5,000 to 24,000 BTUs: Best suited for up to 1,000 square feet, but if the floor plan is open, they can be used in spaces up to 1,400 square feet. STEP 1: Determine how many BTUs of heating and tons of AC you need Method 1: Manual J Calculation The best way to determine the perfect HVAC unit size is to have a Manual J calculation done for your house. The BTU per square foot heating rule of thumb varies widely based on your climate and the size of the house or space you want to. Area = 40,000 BTU / 40 BTU per sq ft = 1,000 sq ft In a standard climate, 40,000 BTU is enough to heat a 1,000 sq ft area. Using our formula from above, a 1,000 square-foot workspace with 8-foot ceiling height means you’ll be heating 8,000 cubic feet of space. 350 to 550 square feet: 8,000 to 12,000 BTU. The point is this – even though Danbydoes the right thing by listing the lower SACC rating too, it bases the room size on the old ASHRAE rating that is inaccurate for portable ACs. Eight thousand BTU air conditioners are some of the best-selling, as they can cool rooms that are 16 x16, 18 x 18, 20 x 20, and even cool small apartments. (2,400 cubic feet) 12,000 BTUs will cover 400 sq. In order to size your mini split correctly, you will need to know the square. The Manual J calculation is the most precise measurement available because it considers factors like: Square footage Climate zone Ductwork. How many feet are 8000 square inches? 8000 square inches is approximately 55. If your plants need 20-30 watts/square foot, and your canopy takes up 4’ x 4’ of that space, you will need 320-480 watts of grow lighting. Choose the 30,000 BTU unit to make sure your comfort needs are covered. For instance, if you live in a home that's 800 square feet, you'll need a unit with 16,000 BTUs. Samantha is an editor who covers all. A 100- to 200 square-foot room, such as a small home office, will have an average recommendation of 4,000 to 8,000 BTUs. So a 1,000 square foot home would need a 20,000 BTU air conditioner. If your BTU requirement is between sizes, simply go with the bigger unit. For a space of 800 to 900 square feet, such as a small home or. But your HVAC dealer only has air conditioners that handle 24,000 or 30,000 BTUs. Generac offers homeowners a range of backup-power solutions including generators and transfer switches capable of protecting every circuit in any size home, for complete whole-house protection. The best way to determine the perfect HVAC unit size is to have a Manual J calculation done for your house. Another quick and easy way to estimate the number of BTU’s required is with this helpful chart:. To find the square footage, multiply the length times the width of the rooms in your home, then add them together. However, a few other factors can influence how many BTUs you need:. How big of a room will a 8000 BTU cool? Between 300-350 ft² or about 30 m². If you've figured that you need a 60k BTU of heating and you buy a 60k BTU gas furnace, you're going to wind up with only 48k BTU of heat which is not enough. The “5,000 – 60,000 BTU Cooling Area” table below shows how various values of BTUs can cool a specific area, starting at 5,000 BTUs and going up to 60,000 BTUs. What is the 8000 BTU air conditioner room size? Type 8000 into the calculator, and the answer is 400 square feet. Mini split coverage starts at about 300 square foot for a single zone system designed for a small room like a bedroom. For example, a 400 square foot room should have an 8,000 BTU AC for optimal cooling. For a space of 800 to 900 square feet, such as a small home or. We get 10,000 BTU by using the AC rule of thumb sizing method (’20 BTU per sq ft of living space’; hence 20×500 sq ft = 10,000 BTU). It says: 10,000 BTU (5,300. An 8,000 BTU air conditioner doesn’t have enough power to cool a lot of rooms. 7,000 BTU: 300 Sq. ” (DOE, Room Air Conditioners) Simple answer to ‘how many BTU per square foot’ is 20 BTU per sq ft. Units in the 6,000 BTU to 8,000 BTU are ideal for use in a small room like a bedroom or office. Using the example from above, to find the BUTs needed for a 144 square foot room, 144 x 25 = 3600 BTUs. If your space is 300 square feet, you want to find a model capable of producing at least 6,000 BTUs. (3,600 cubic feet) 14,000 BTUs will cover 500 sq. BTU Chart for Sizing an Air Conditioner. (Example 1) What is the 5000 BTU air conditioner room size? Use the calculator to determine that a 5000 BTU window AC will cool a room up to 250 square feet. A good general rule to start with for finding the right size AC unit is to have 20 BTU for every square foot of house. If your space is 300 square feet, you want to find a model capable of producing at least 6,000 BTUs. Mini split coverage starts at about 300 square foot for a single zone system designed for a small room like a bedroom. Units in the 6,000 BTU to 8,000 BTU are ideal for use in a small room like a bedroom or office. How to Calculate BTU Per Square Foot for Air Conditioners. Moreover, the size of this bedroom can be efficiently cool with an 8,000 BTU window air conditioner or a portable air conditioner. In a standard climate, 40,000 BTU is enough to heat a 1,000 sq ft area. (1,600 cubic feet) 10,000 BTUs will cover 300 sq. You will probably need more than 20 BTU if you live in. So, for instance, if you have a garage that is 20 feet long and 15 feet wide, your square footage is 20 X 15, or 300 sq ft. You will probably need more than 20 BTU if you live in. 6,000 BTU’s: 1,000 sq. Consult the following chart to see where your square footage lands in relation to the amount of BTUs. For example, 10 foot high ceilings are 25% taller so you will need to increase your BTU total by 25%. But other considerations, such as the ceiling height and the size of your windows and doorways, might. Using the example from above, to find the BUTs needed for a 144 square foot room, 144 x 25 = 3600 BTUs. Here are some general guidelines for choosing the appropriate BTU for your room size: 150 to 350 square feet: 5,000 to 8,000 BTU. What is the 8000 BTU air conditioner room size? Type 8000 into the calculator, and the answer is 400 square feet. Choosing the right sized air conditioner can be as easy as using a tape measure and a little mathematics. If the room is higher than 8 feet, however, you need to add 1000 BTU per foot over that height. 5 tons (this is the minimal figure; you have to add 4,000 BTU for kitchen and about 20% because Austin, TX is hot). How Many Square Feet Does a 2-Ton Mini Split Cool? Mini-splits with a power of 24,000 BTU per hour can warm or cool areas ranging from 1,000 to 1,500 square feet. The U-shaped design blocks the noise coming from the compressor outside. (3,200 cubic feet) 13,000 BTUs will cover 450 sq. 5 tons (this is the minimal figure; you have to add 4,000 BTU for kitchen and about 20% because Austin, TX is hot). According to the US Department of Energy directive, an air conditioner’s most appropriate size would be 2,880 BTU unit. If you live in a warmer climate, 40,000 BTU will heat more than 1,000 sq ft area. Using our formula from above, a 1,000 square-foot workspace with 8-foot ceiling height means you’ll be heating 8,000 cubic feet of space. Convert the square footage into BTUs: To calculate the estimated BTUs needed to heat or cool the room, multiply the room’s square footage by 25. Department Of Energy recommendation for the size of room air conditioners: “an air conditioner generally needs 20 BTU for each square foot of living space. Area = 40,000 BTU / 40 BTU per sq ft = 1,000 sq ft In a standard climate, 40,000 BTU is enough to heat a 1,000 sq ft area. The quick answer is 60,000-80,000 BTUs based on different climate zones. The quick answer is 60,000-80,000 BTUs based on different climate zones. 55 repeating square feet. No matter which method you choose, the goal is to estimate the number of BTUs you need to comfortably cool or heat your entire home. However, a few other factors can influence how many BTUs you need:. Mini split coverage starts at about 300 square foot for a single zone system designed for a small room like a bedroom. Is 8000 BTU enough for a bedroom? It is possible to cool most standard bedrooms and offices with a window AC or portable air conditioner. An 8,000 BTU air conditioner is able to cool a 350 square foot space (the size of an average hotel room) in under an hour and comfortably maintain the temperature. The digital displays and controls let you precisely decide the ideal temperature that the air conditioner should maintain. Obviously, if you live in colder climate, a 40,000 BTU heater will heat an area below 1,000 sq ft. This device is ideal for rooms that measure even up to 600 square feet based on the ambient air conditions. An 8,000-BTU air conditioner can cool up to 350 square feet, while an 18,000-BTU model cools up to 1,000 square feet. Answer: 8000 ft² = 0. The rule is that you need 30,000 BTU for 1,500 square feet. How Much Should You Expect To Pay In Electricity Costs For Your Air Conditioner? Energy costs for running your 8,000 BTU unit depends on several factors. These BTU calculations are based on a standard room with 8-foot ceilings, two windows and one door. For example, see the two ratings listed on this Danby model – the old rating of 10,000 BTUs plus the SACC rating of just 5,300 BTUs. For example, a 300 square foot room typically requires 7,000 BTUs to maintain a comfortable temperature, while a 1,000 square foot room requires 18,000 BTUs. Purchase the unit that best corresponds to the amount of square footage you have. Then use the obtained square footage to. There are calculators available to help homeowners factor the right sized unit, but there are also some rules of thumb that can be followed. Portable Air Conditioners / 6,000 to 14,000 BTUs: Best suited for up to 400 square feet in most areas. See this window air conditioner on Amazon. Where to Buy Features % buffered 3-Step Quick & Easy Installation. This 8,000-BTU Midea unit claims to cool rooms up to 150 square feet. Will a 10000 Btu air conditioner cool a living room?. If the room has more windows, doors or higher ceilings, adjust the BTUs upward. When you insert 12,000 btu into the calculator, you’ll get an answer that’s between 500 and 650 square feet. How many square feet CAN 8000 BTU cool? 8,000 BTUs will cover 200 sq. There is no waya 5,300 BTU air conditioner will serve 450 square feet. What AC Tonnage Do You Need If the Area Is 1,100 Square Feet?. Simple answer to ‘how many BTU per square foot’ is 20 BTU per sq ft. Another example shows that a 12,000 BTU heater, one 1 ton heater, serves up to 400 square feet. Area = 40,000 BTU / 40 BTU per sq ft = 1,000 sq ft In a standard climate, 40,000 BTU is enough to heat a 1,000 sq ft area. The best you can do here is to buy a small 5,000 BTU. Look for a unit with a higher BTU rating to cool a larger room. An 8,000 BTU air conditioner is able to cool a 350 square foot space (the size of an average hotel room) in under an hour and comfortably maintain the temperature. 25 BTU per sq ft = 320 sq ft; 8,000 BTU unit could cool down 320 sq ft room. Medium rooms: For rooms between 350 and 700 square feet, you’ll want a 11,000-to-14,000 BTU unit. In order to size your mini split correctly, you will need to know the square footage of the room, and check it against our table. 133 reveals you’ll need a little more than. As a guide, consider 5,000-BTU models for rooms 150 square feet or smaller, 8,000. Ceiling height – if it’s higher than 8 ft. ” (DOE, Room Air Conditioners) Simple answer to ‘how many BTU per square foot’ is 20 BTU per sq ft. To properly estimate the size of an air conditioner for your square footage, you can use the BTU calculator here. How many BTUs are needed to heat a room? To get a basic estimate of the heating requirement you then multiply the cubic feet by 3, 4 or 5 depending on the destination of the room starting with 3 for kitchens and common rooms, 4 for bedrooms and children rooms and 5 for dining and living rooms. A 2,000 square foot home is best served by air conditioning with around 40,000 BTU capacity, which would be 3. The best you can do here is to buy a small 5,000 BTU window or a small 8,000 BTU portable AC unit (more about the smallest AC units here). A 100- to 200 square-foot room, such as a small home office, will have an average recommendation of 4,000 to 8,000 BTUs. Note that 1 ton equals 12,000 BTU per hour of cooling capacity. Here is a table with calculated 3,000 sq ft furnace sizes for all 5 regions: We hope everybody will be able to use the furnace capacity calculator and get a good estimate of the size of the furnace they need for winter heating. So a "60,000 BTU" gas furnace that's 80% efficient will supply only 48,000 BTU to your home. Conversely, reduce the BTU by 10% if the room is heavily shaded. The BTU requirement will be for the whole room, so you need to calculate the total amount of space the room covers. In order to size your mini split correctly, you will need to know the square footage of the room, and check it against our table. So a 1,000 square foot home would need a 20,000 BTU air conditioner. The largest mini split heat pump systems are ideal for 2,500 to 3,000 square feet. As a guide, consider 5,000-BTU models for rooms 150 square feet or smaller, 8,000 BTUs for medium-size rooms (340 square feet), and 12,000 to 14,000-BTU models for rooms with. Long-distance Airflow up to 20 feet The strong airflow allows you to feel the cold air up to 20 feet away. For instance, if you live in a home that’s 800 square feet, you’ll need a unit with 16,000 BTUs. Determine how many BTUs of heating and tons of AC you need Method 1: Manual J Calculation This chart is a general guideline that covers tiny houses to average size homes. Hot Appliances If the room you are planning on installing an air conditioner in is the kitchen,. Each indoor unit will be capable of providing a set number of BTU’s of cooling and heating power. 1400-1500 square feet = 24000 Btu per hour. A typical bedroom measures between 132 and 219 square feet. 293 watt-hours, or the energy released by burning one match. The size of the area that a portable air conditioner will keep cool varies depending upon the number of BTU's the unit has. For a space of 800 to 900 square feet, such as a small home or two-bedroom. 5200 BTU is equivalent to 1500 watts of electricity, a very common heater size. Units in the 6,000 BTU to 8,000 BTU are ideal. These BTU calculations are based on a standard room with 8-foot ceilings, two windows and one door. Existing Ductwork The size of your air conditioning unit must be compatible with your ductwork. You get 1,800 sq ft * 30 BTU per sq ft = 54,000 BTU or 4. Obviously, if you live in colder climate, a 40,000 BTU heater will heat an area below 1,000 sq ft. An 8,000 BTU air conditioner is sufficient for a standard size bedroom. The chart above is very accurate if you’re considering a window AC. Other factors in determining the BTU size would be the room’s purpose. Determine how many BTUs of heating and tons of AC you need Method 1: Manual J Calculation This chart is a general guideline that covers tiny houses to average size homes. See computation below: BTU = Area x 20 = 400 x 20 = 8,000 BTU Answer: You need 8,000 BTU to cover the area of 400 square feet. 700-1000 square feet = 18000 BTU per hour 12. While many through-the-wall air conditioners use a standard. 293 watt-hours, or the energy released by burning. A BTU is the heat needed to raise the temperature of one pound of water by one degree Fahrenheit. If the room is higher than 8 feet, however, you need to add 1000 BTU per foot over that height. If the ceiling is 10 feet high, choose an 8,000 or 9,000 BTU heater instead. As a general rule of thumb, for every person over an initial 2 people, add 600 BTUs. First you need to know how many square feet a ductless air conditioner can cool. In short, the 3 ton AC system is undersized and not by a small margin. A 100- to 200 square-foot room, such as a small home office, will have an average recommendation of 4,000 to 8,000 BTUs. The BTU per square foot heating rule of thumb varies widely based on your climate and the size of the house or space you want to heat. If the ceiling is 10 feet high, choose an 8,000 or 9,000 BTU heater instead. The quick answer is 60,000-80,000 BTUs based on different climate zones. There are calculators available to help homeowners factor the right sized unit, but there are also some rules of thumb that can be followed. Take the total BTU of the indoor heads, to establish the total outdoor capacity needed. How to calculate LED wattage requirements If you are planning on using LED grow lights, there are a few things you need to know about calculating your grow light coverage. BTUs, square footage, and more are key to helping you decide what size HVAC unit your home needs. For instance, if you live in a home that’s 800 square feet, you’ll need a unit with 16,000 BTUs. You will probably need more than 20 BTU if you live in sunny Texas or if you have lots of windows. A good general rule to start with for finding the right size AC unit is to have 20 BTU for every square foot of house. So, if the Table says you need 6,000 BTU, the equation is 6,000 x 1. 25 = 7,560, or rounded up to 8,000. (4,000 cubic feet) Note: The guidelines above are not exact. Total Square Footage = Area “A” + Area “B” + Area “C” = 290 Total Square Feet Selecting the BTU Rating of Our Room Air Conditioner Comparing our calculation to the chart below, we see that 290 sq ft comes in at the high end of a 7,000 BTU unit. Air Conditioner Amperage Chart (From 5,000 BTU To 18,000 BTU) On the amperage chart above, we have charted the maximum estimated amps, an AC unit of 5,000 - 18,000 BTU is estimated to draw. 5,000 BTU’s: 700 sq. Furnace size for a 3,000 square foot home range from 105,000 BTU to 180,000 BTU, depending on the climate zone you’re in. Long-distance Airflow up to 20 feet The strong airflow allows you to feel the cold air up to 20 feet away. approximate square footage: up to 200: up to 400: up to 600: up to 800: up to 1000: calculate the btu you need here! recommended insulation: 4,000 btu: 8,000 btu: 12,000 btu: 16,000 btu: 20,000 btu: moderate. So you have to calculate the output when you buy a gas furnace. What is a BTU? The British Thermal Unit, or BTU, is an energy unit. The cooling capacity of air conditioners is expressed in British Thermal Units or BTUs. However, a few other factors can influence how many BTUs you need:. On the other hand, if you live in a 5,000-square-foot home, get a unit with 100,000 BTUs. There is no waya 5,300 BTU air conditioner will serve 450 square feet. 10,000 BTU (5,300 BTU, SACC*) Portable Air Conditioner cools spaces up to 450 sq. The reason is that there are 144 (12 *.