This capacity is measured in British thermal units, or BTUs. Here’s how to quickly calculate square footage: Measure the length of the room. A British Thermal Unit, or BTU is a unit of measurement of energy. Posted on May 09, 2018 by Alison Prelusky When you're shopping for a new air conditioner, finding the best BTU level for the soon-to-be-cooled room is a very important step. If the room or house you are cooling is heavily shaded, you may need 10 percent fewer BTUs to cool it. Another way to look at it: many homes that are 2000 sq ft have a furnace that is around 100,000 BTU. Getting the right size heater for your garage saves money twice. 10 pts for some good advice, thanks. Air Conditioner Sizing Tutorial. This is the amount of cooling required so you need one or more air conditioning units to handle that amount of heat. Purchasing our top quality products, with the perfect sized air-conditioner, is as a long term investment. Measure the room’s LENGTH X WIDTH and you will have the square footage of the room. The amount of BTU’s required per radiator will depend on how many radiators are within the room – so divide the total BTU requirement by the number of radiators to calculate the average BTU’s required per radiator. A BTU is the heat needed to raise the temperature of one pound of water by one degree Fahrenheit. BTU Calculator - Room AC Size Guide. Use our BTU Calculator to determine the heat requirements of your room. We’ve rated and measured our units against a number of different room and/or home conditions that can effect the cooling power required. Use the dropdowns below to help you estimate what size air conditioner is best for your space. How Many BTUs to heat a 2000 sq ft house. Calculating the BTU for your room. Here are three good choices. Before buying an air conditioner, find out how many BTUs you need.. The first thing you need to do is determine the square footage of the room you are going to cool. 1. Take a look at the webpage below for a good chart to reference for how many BTU's are needed to cool different size rooms. In this case, do not hesitate to divide the total watts required by the number of the windows for each room. 48,000 btus is equal to 4 tons of air flow, 12,000 btus per ton. Southern California. If the house or room is very sunny, however, add 10 percent more BTUs. BTU Calculator: What Size Air Conditioner Do I Need? 1 BTU is the equivalent of 1,055 joules or .293 watts. The cooling power of different types of air conditioners is based on BTU’s. You need 144 sq in per ton. We need 143 BTU’s to melt 1 pound of an ice cube. How many tonnes of Air Conditioner is required for a room? How much air conditioner BTU's I need? How to Estimate the Heater Size for a Garage. You would need about 6,000 BTU's to cool a 12 x 14 size room. Then work out the size of those rooms and add them together. This means think of the size of the room, and what the room will be used for.Matching Btu requirements to room size is very important when you buying an air conditioner system. The larger the space, the more BTUs are needed. The best way to get an accurate calculation is to enlist the services of a plumber. As a general rule, an air conditioner needs 20 Btu per square foot of living space. To measure your room, multiply the room … I need to heat and cool a room that is 22.5′ x 22.5′ (506 sq.ft.) If you're considering a ductless split system installation, you probably have some questions. This will give you a general idea of what sized unit you need. How Many BTUs Are Needed for a Window Type A/C to Cool a 20x10 Room?. This is for upper midwest winters and good insulation. While selecting a system with too many BTUs will waste energy and increase your electric bill unnecessarily, choosing one with too little will be ineffective. Small air conditioning units have a cooling capacity of between 5000 and 10000 BTUs. Simply enter the details in the corresponding fields and we’ll show you how many BTUs you need to ensure your space is always warm, cosy and inviting. How you heat each room will depend on a number of different factors and where you are trying to heat. My living room is roughly 330 square feet, which the chart tells me means I need an AC unit with a capacity of 8,000 BTUs per hour — which was way less than I expected. The Rules for Keeping Cool As a rule of thumb, an air conditioner needs 20 Btu for each square foot of living space. Room Occupancy. Each room has a different heating requirement and a different ‘ideal’ temperature, so a radiator that is perfect for one room, may not be ideal for another. First you need to know how many square feet a ductless air conditioner can cool. footage. But other considerations, such as the ceiling height and the size of your windows and doorways, might call for more cooling power. However, calculating BTU is not an impossible task, and you can even do it … To find out how many lumens you’ll need in a given area, you need to start by measuring the room. The formula to convert BTU to kW is the following: P(kW)= P(BTU/hr)/ 3412.14. For example: A 3.5 kw air conditioner will cool a room size from 21 m 2 to 35 m 2 efficiently. Click to see full answer Simply so, how many square feet will 5200 Btu heat? BTUs per square foot x square footage = BTU output needed Many appliances come with charts that list how many BTUs you will need for different area sizes. Answer Save. Total Heat Load = Room Area BTU + Windows BTU + Total Occupant BTU + Equipment BTU + Lighting BTU. How to Calculate How Many BTU’s You Need. 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