Electric Heater Accessories Gas Cylinder Storage Gas Heater Accessories Propane/Butane Hoses and Regulators What other heat sources are present in the room? For example, light bulbs, computers, and technical devices with power supplies, such as televisions or music systems. The number of watts you need more. To find the right air con unit, you need to get an understanding of the measurement of air conditioners. BTU means ‘British thermal unit’ and it measures the energy that indicates the cooling capacity of an air conditioner. For example, 1000 BTU per hour is approximately 293 Watts per hour.

It is a 137 square foot bedroom with 8 foot ceilings. There is also an additional raised platform space that is about 4 feet high from the platform to the ceiling and is 135 inches wide and 27 inches deep. Hello there, you’re right, you have quite a complex situation and therefore the BTU estimate is not a piece of cake. 5,000 BTU unit might be adequate but with so many variables the safer option would be 6,000 BTU (San Diego, raised platform space, and so on). Hope this helps. Reply 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 In any case, one air handler just can’t produce enough airflow for the air to reach all the rooms. If it would, that indoor unit would be ‘windy’ and noisy. Having 3-zone mini split, or even 3 individual 12,000 BTU Mr. Cool DIY units would be most optimal. ReplyNoise levels. All air conditioners in operation make a fan-like noise, but they vary by as much as ten decibels, which could make all the difference when you’re trying to sleep. The maximum cooling power of your air con in British Thermal Units. The greater the BTU, the larger the space the unit can cool. I have a 640 sq ft garage. The mini split system I am looking at comes in 12000 or 18000 btu. What is best for this size garage? Reply

I’m looking to use a portable air conditioner in my garage. Its 683 sq ft with an 11 ft ceiling. I live in central North Carolina. Direct sunlight on insulated garage doors during the afternoon. Garage walls are foam insulated. Four windows, three of which get direct sunlight. Windows are doubled pane. Cement floor. According to your BTU calculator I would need 18,837.5 BTUs. Not sure if they make that size AC in a portable? So, would two 10,000 BTUs work or 14,000 BTUs work just as well? Reply Smart Wi-Fi air conditioning, controllable with the HomeWizard Climate app, voice control and remote control b t u in each bedroom i would do the 3 in each bedroom and one in the living room you will save in the long run if you are not in the kitchen and living room at night turn that one off and save a lot ,but only one for the whole house would pretty much have to run 20 to 24 hour a day more expensive and in about 6 to 8 years would have to replace the unit to much work for one ac, now a good 2 or 2 1/ 2 ton central may last you 10 to 14 yearsa 3 bedroom unit or ranch with living room kitchen and bathroom you are talking about 2 choices a 1800 b t u or the second choice 12,000 220 volts outlet in the living room and 6000, How many people are in the room? One person gives off 100 watts of heat, which the air conditioner must compensate for.