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My girls just moved into a small 2 bedroom house without ac. We need to decide on portable ac or a window unit. Particularly in the case of heat pumps and air conditioners, the cooling capacity of appliances is often given in BTU. Therefore, BTU is defined as how much heat energy is needed to raise one British pound of water by 1 degree Fahrenheit. I want to be able to cool the garage down to 80 to 85 degrees from 100 to 110 degrees outside temp. 3 car garage, 9 foot ceilings, 660 square feet with one window…walls, ceilings and garage doors insulated…. is 18,000 BTUs enough? Reply I am living in the Caribbean, my entire house is 30 * 20 ft, one bed room is 11 * 9 ft floor to ceiling throughout the building is 9 ft. The house is elevated and has wooden floors now can you advise say if i should buy the 4000 BTU for my room or splurge and buy the 12,000/14,000 BTU for the entire house?
Hello Pond, your dilemma is understandable. An average 350 sq ft room would need a 7,000 BTU unit. However, the 3 big windows can really increase the size of the air conditioner you need. Beat the summer heat in the most effective way possible – say hello to this 765W mobile air conditioner from Zephyrus. A small and compact design that can fit into small and tight spaces easily, it features three functions over two speeds: cooling, dehumidifying and ventilating, allowing you to be in control and set to a mode that best suits you. A built-in 24-hour timer allows you to set the unit to run until a certain time – perfect for when you want to use it getting to sleep but don’t want it on as you wake up, with its auto shut-off function preventing electricity from being wasted when the tank is full. Remote control included, 2 x AA batteries required but not included. Features and Benefits Yes! The comment above for North and South is very correct. I live in Louisiana and I’m replacing a 18000 BTU in my 750 sq ft livingeoom/kitchen area in my mobile home with a 24000 BTU. Last summer was horrible , the lady who owned it before didn’t buy a big enough unit. After sweating through months of 95 degree days I had enough. We had a metal roof installed that helped, but the whole home is full sun. Yes min. requirements for a week or two up north will get you by, but months of 95+ heat with minimal BTU will just make you mad and kill your unit. I would go up a size atleast depending on your area. Another example my daughter had a 5000 BTU Ac in her 178 sq foot room. It only just cooled it enough to sleep at night. In the daytime it was useless. I often wondered how she could even sleep half her teenage day in there. We also upgraded it this summer. We moved the 18000 BTU to our room which is about 300sq ftThe wall ac just died since it is 13 years old and landlord isn’t going to replace it, so, it is up to me, but all i see are window ac units and 5,000btu is too big for the wall opening. Reply Note: Evaporative coolers and mini personal air coolers do not produce a cooling effect that can be expressed in BTU. They use water evaporation instead of the refrigerant-based system to provide a cooling effect. Hose length. Make sure the exhaust hose is long enough to reach the window you will be expelling the hot air through. Most are 1.5m long. Power cables are usually the same length, so bear that in mind too.
Cost Effective: The advanced sleep mode keeps you cool while minimising overnight energy consumption by gradually reducing fan speed. Hello Lindsay, it really depends on how much cooling output your central AC. In any case, the safer option is the 13,000 BTU unit; it will hardly be overkill, given only 3,000 BTU difference between 10,000 BTU and 13,000 BTU unit. Reply Hi, I’d like to change window AC unit to a new one. The old one I’m using is 5,200 BTU and it’s not cold enough for summer and now it fails to work properly. My room size (long shape / Studio with kitchen) is 32×11 ft. ( 350 sq.ft.) with 8 ft ceiling, highly sun exposure side of the building (3 windows size: 3×5.2 ft ). I have 2 choices of AC 8,000 BTU or 13,000 BTU. ( someone has extra AC and offer 1 from these 2 to me).Cools, dehumidifies and ventilates over two-speed modes, keeping you cool during different types of heat, with an LED display for easy control Mini-split AC units. Example: Mr Cool mini-split units have the highest SEER rating of above 20 EER. The running costs of around 25 to 35p per hour will seem reasonable value for money the next time temperatures rise. Most have a Class A energy rating. We have a 2,000 sf home in the upper midwest. The first floor is about 1350 sf with 9 ft ceilings. The second floor is the other 650 sf with 8 ft ceilings. Our south facing windows are about 140 sf and north facing are about 111 sf. We also have an extra refrigerator and a freezer along with the usual appliances. We estimate we would need a 4 ton AC unit. We are wondering what you would estimate with this info. Thanks. Reply Hello Karl, sufficiently cool even in Florida’s heatwave. That’s a very small room and quite a normal-sized air conditioner. You can set the temperature as cold as you wish; the 14,000 BTU AC will handle it. Reply
Hello Meg, the total area to cool down is 560 sq ft. According to the EPA, you would have to multiply that number with 20 to correctly size your air conditioner unit. Of course, other factors such as sun exposure and your location can significantly increase the size of the AC unit that would be most appropriate. I’m looking at installing split system. My house is 4 bedrooms plus lounge/ dining and family/kitchen just wondering how many systems and what size( was advised by store that I would need 1 for each bedroom and possibly 2 others) Expensive!! But not sure if this will be correct?? Reply Hello M, nice plan. Your calculations for the master bedroom with bathroom and another bedroom sound about right. The cathedral ceiling open concept area is fun indeed. 🙂 Calculating the full volume of that area is a bit complex. Let’s simplify it a bit; a 1,000 sq ft area with 16 ft average ceiling height. For that you would need somewhere between 40,000 and 50,000 BTU; depending on insulation, sun exposure, and so on. As recommended by The U.S. Department of Energy, the ballpark figure is 20 BTU per sq ft. That is a very good estimate already.Hello, I am trying to get an AC unit for my fifth-wheeler. It’s 32×9 in average (somewhere in between 280-340 sqft). The ceiling has a height of 8 ft. Do you think a 15,000 BTU unit would be an overkill? Also, I am considering that since it is pretty long (32 ft) 15,000 BTU could do a great job. Thank you Reply Hello Marlene, we’re talking about a 336 sq ft space. If it were a normal room in an average climate, you would need about 8,000 BTU minimum to cool it sufficiently. Add hot Louisiane, sun exposure, and so on, and you get to as much as 14,000 BTU. In short, 14,000 BTU is adequate AC sizing in your situation. Reply
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