For example, a 10 x 12 room with 10-foot ceilings would require a 1500 watt space heater. The more BTUs a model has, the faster it will burn up your fuel, so it is wise to only go for a grill with the amount of BTUs you need to get the job done. Knowing the amount of energy, measured in BTU’s, is necessary to keep your home comfortable in the both heating and cooling seasons. Simply measure the length and width of a room and figure the square footage. Cool or The size of the air conditioner to be installed in your room depends on the size of the room that needs cooling. . Understand that these are rough estimates only and that actual BTU’s will depend on several factors:  the number of windows, the climate, the age of the building, orientation to the south, the type and amount of insulation, construction techniques, etc. Total Area of the Room = 10 feet X 15 feet = 150 Square Feet. 1 BTU is the equivalent of 1,055 joules or .293 watts. We’ll look forward to providing you with worthwhile information and great service . Calculate the BTUs You Need Once you have completed steps 1 through 5 above, you’re ready to calculate the BTUs you need. Area by 30 (Constant) = 150 X 30 = 4500 BTUs. Here’s how many BTUs you need for your room or house. What size radiator do I need? Aircon Experts offers you a way to calculate the perfect air-conditioner size (Better known as BTU size) required for your rooms and/or offices. When it comes to your living room the look of your radiator is probably as (if not more) important as the heat output, but still, you want to get it right so you have a warm and inviting space in which to relax and entertain. Obviously, there are several other variables that are difficult to quantify when estimating the energy required to heat your space. So many people face this problem: “I have a small 12 x 12 room, how many BTU air conditioner do I need? Also, how many BTU do I need to cook a steak? This calculator can only gauge rough estimates. Step 1 Find the Area of the Room,. If the room has cement or tile floors, it may feel colder. To calculate your total square footage for a room , just multiply your room width and length together. Using the sizing chart to calculate the appropriate BTU rating needed to cool that area of the home, it's an easy selection choice from there. 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. Say your room is 10 ft. long and 20 ft. wide then 10 x 20 ft= 200 square ft. Now multiply the height 200 sq ft. x 10 ft. and 2000 cubic ft. is the volume or the amount of space in the room. Therefore, a room with lots of windows normally means poor insulation. Generally, in Australia you will need 120 to 150 Watt of power per square meter of floor area. We often refer to the British Thermal Unit as a BTU, but the rating is actually the BTUs per hour, or BTU/h. You need an 850-watt radiator to produce the 2,898 BTUs per hour needed by the 12-by-10-by-7 foot room … Alternatively, if you have a BTU measurement and would like to find out the heat output of your radiator in Watts all you would need to do is divide the BTU’s by 3.41. A friend is offering me a 6000 btu AC only 2 months old for $80. It could mean reducing humidity levels. An air conditioner suitable for a 12 by 15 room has a minimum cooling capacity of 4500 BTU. Use our BTU Calculator to determine the heat requirements of your room. For small rooms, even the smallest 3,000 BTU air conditioner would suffice. BTU Chart Based on Room Size Don’t want to use the BTU calculator above? However, calculating BTU is not an impossible task, and you can even do it all by yourself. 1 BTU = 1,055 joules, 252 calories, 0.293 watt-hour or the energy released by burning one match. Shape of the home. 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