How to Calculate Correct Central Air-Conditioning Unit Size Calculating the proper size for a central AC unit requires determining how much energy is required to pull heat out of the air. The calculation determines the BTUs (British Thermal Units), which can be easily converted to tonnage. Most central AC units are ranked by the tonnage of the units, such as 2.5 or 4.0 tons. The easiest method of determining the proper tonnage for your living area is to calculate the square footage of individual rooms and converting that to BTUs and tonnage. Measure each room individually for length and width including any hallways or storage areas that will be impacted by the central AC unit. Do not include rooms that are not connected or will not be impacted by the unit, such as closets, basements or attics. Multiply the length of each room by the width to determine the square footage. Convert the square footage of each room to BTUs. 100 to 150 square feet equals 5,000 BTUs. 150 to 250 square feet equals 6,000 BTUs.

250 to 350 square feet converts to 7,000 BTUs. Add 4,000 BTUs to kitchens and 1,000 BTUs to laundry rooms or bathrooms.carrier rv ac unit Add each room's BTU calculation together to determine the whole house BTUs.how does air conditioner work with furnace Divide the whole house BTUs by 12,000 to determine the tonnage. best energy efficient ac window unitsRound the tonnage up to the nearest 5/10ths. For example, 4.1 tons should be rounded to 4.5 tons. 3.8 tons should be rounded to 4 tons. Here is how you can calculate the size air conditioner unit you will need. Does this Spark an idea? Determining a central air unit size helps you save money on energy while ensuring you have the capacity that is needed to...

Calculate the size of your home in square feet. How to Size Central Air Conditioning Units. An air conditioner's size is... Sizing an AC unit refers to choosing a unit with the correct cooling capacity for the space to be cooled. If your air conditioning unit ... Frost developing on your central air conditioning unit may seem impossible when the unit is sitting... The proper size air conditioner impacts the life of the unit, ... Buying A Central Air Conditioning System; What Size Central Air Conditioning Unit Is Needed? How to Calculate Air Conditioner Size for a House; Comments You May Also Like.... How to Determine Central AC Size What to Ask When Replacing a Central Heat and Air Unit The following technique can provide you with an approximate size estimate for your new furnace or central air conditioner. Although you may reasonably use this estimate as a first pass when browsing through furnace or air conditioner models, you (or your HVAC contractor) should complete a thorough

load calculation before you make your purchase. 1. Square footage of your home: square feet (ex: 2400) 2. Which of the following statements best describes your home and its insulation? No insulation in walls, ceilings, or floors; windows and doors fit loosely R-11 insulation in walls and ceilings; no insulation in floorsdoors and windows fit fairly tight R-19 insulation in walls, R-30 in ceilings, and R-11 in floors; tight-fitting storm windows or double pane windows "Superinsulated" house with R-24 wall insulation, R-40 in ceilings, and R-19 in floor; or double pane windows; vapor barrier sealed carefully during Earth-sheltered house with little exposure; Our BTU (British Thermal Units) calculator will help you to work out the heat requirement for your room, and recommend the number of radiators you will need to comfortably heat it. A British Thermal Unit (BTU) is a measure of heat output from a radiator. Depending on the size of your room, the number and type of windows and what the room is used for, you'll need more or less heat.