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We want an air conditioner that has just the right amount of cooling effect. That’s why by knowing the square footage of the area we want to cool down, we can calculate how many BTUs should our air conditioner have. Hello Sue, the 13’2” by 14’5” room has about 190 sq ft. Let’s assume that the cathedral ceiling has a height of 13 ft. Such a bedroom has the same volume as a 310 sq ft room with an 8 ft ceiling height. That would, roughly speaking, require a 6.200 BTU portable AC unit. With that big sliding glass window and a lot of sun, the safe estimate for the most optimum AC unit would be 7.000-8.000 BTU. Hello Daryl, the biggest residential portable AC units have a maximum cooling capacity of 15,000 BTU. It’s an electrical thing; if you want 15,000 BTU+, you would need 220V instead of 115V, or alternatively, you would have to double the Amps, which is not ideal. In your situation, you would probably need two units, yes. 2 x 10,000 BTU would make sense. Maybe a combination of 14,000 BTU and 8,000 BTU would be smarter; you only run 14,000 BTU most of the time but during a really sunny day, you also turn on the 8,000 BTU unit. Reply of walls are all glass top to bottom. ( room built 1963 ) It also has a very heavy Sun exposure. Located above this added on room is an open attic… can you help Reply
Hello Julio, for 280-340 sq ft, 15,000 BTU would be an overkill. You’re correct to be concerned about the 32 ft length; you want to have a conditioned air throughout the fifth-wheeler. The best solution here would be a 10,000 BTU unit with a strong airflow. Strong airflow – something above 300 CFM – is better for long spaces because it can push the air along the space much better. Reply Portable units running of 110/120V go up to 15,000 BTU (above that, you’ll need 220/240V voltage). Obviously, dual hose units are better (higher efficiency, lower long-term costs; based on EER rating). Would a 14,000 btu window unit be adequate for an added on den (no windows-only a skylight) that has insulated walls but not roof, 24×14, morning sun exposure, adjacent to kitchen, very hot in Louisiana ! Thanks much ! Look forward to hearing from you soon. Reply
BTU in air conditioners is simple a metric of how much cooling effect that particular AC unit can produce. Hello Tommy, if we apply the EPA recommendations for 8 ft ceiling we get 640 sq ft * 20 = 12,800 BTU. Now, 18,000 BTU would definitely do the job but it might be an overkill. According to the calculation, the 12,000 BTU is nearly enough. Basements tend to be colder because they have less sun exposure and are located near the ground. 12,000 BTU might just cut it, especially if you have a 7 ft ceiling. Reply I just bought a little single wide in Texas. 2- 130ft sq bedrooms 1- 48sq ft bathroom, living room and kitchen 338 sq ft and ceiling is 7 ft. I am thinking of buying a mini split. Is it possible to just use one console to heat/cool the whole place? If yes, how many btu’s do you reccomend? Given these this range of uses–one for the whole upstairs and one for the south bedroom only–do you think I need a unit with more than 10,000 BTUs? For several reasons, I’d rather not install a unit for each bedroom.
Here is an example of how you can calculate how many BTUs you need to cool down a 500 sq. ft. area with 8 feet ceilings, average sun exposure, average climate, and not including kitchen (you can find this BTU calculator below and use it for your situation; with 4,000-24,000 BTU room size table):It does not show anywhere,but it says 430m/h with a little 3 on the 430M.I dont know it it is sq.ft or sq.meters.Just want to know the BTU. It also says 3266W. The name is PROKLIMA M110 Cools, dehumidifies and ventilates over two-speed modes, keeping you cool during different types of heat, with an LED display for easy control
Hello Sivaram, a 660 sq ft room with low sun exposure would need, roughly speaking, 14,000 BTU AC unit. The only standard for BTU size is the EPA recommendation of about 20 BTU for every 1 sq ft of a room; other factors may apply as well. In your situation, a 14,000-15,000 BTU should do the job well. Reply This is not intended to be a full statement of your rights under the Consumer Contracts Regulations. Full details of your rights are available from your Local Authority’s Trading Standards Office. How To Return A Product Hello Grace, for the (roughly speaking) 350 sq ft living room you would need a 7,000-8,000 BTU AC unit. However, the kitchen is additional space and for kitchen you usually have to add 4,000 BTU. All in all, 12,000-14,000 BTU would make sense in this situation. You can opt for portable or window AC unit; mini-split unit would be a bit too much. Reply How many BTU’s ASHRAE for 250 square feet, 8 ft ceiling, standard room, no sunlight or windows except for the AC vent, located in California? Hello Ruth, for 850 sq ft you would need a 17,000 BTU device and 6,000 BTU device for the 300 sq ft room. The best option would be to use a 2 zone mini split AC unit (1 outdoor unit with 2 indoor units, one in each room). 2 zones should have a capacity of 17,000 BTU and 6,000 BTU respectively. Such a combination, quite frankly, is hard to find; the most common 2 zone unit is 12,000-12,000 BTU. ReplyI am looking to cool down a room that is 12x10ft with 9ft ceilings with one window that gets the sun in the morning, for two people sleeping and living in it. I might be able to buy a used 6,500 (DOE) BTU unit (10,000 ASHRAE) at a good price, but I was wondering if it would be too much for my room and would cause problems? Hello Missy, 8,000 BTU is the optimum capacity. The 10,000 BTU would be overkill; it would cool the space better due to 2,000 BTU more cooling power but the electricity bill and the initial portable AC cost would be higher. Reply There are different ways to cut this where I could calculate anything from 7,500 to 15,000 units, but am considering to go with a 12,000 unit on balance. Does this seem reasonable?
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