What Size Central Air Unit Do I Need

If you need a unit that has more than 5 ton cooling capacity then it is likely you will need multiple ac units.

Indeed it s often the only factor listed in rule of thumb guides. The manufacturers do not list the air conditioner size on the unit. What s underneath and on top of the room. Getting the right size ac unit for your house is very important if you want to have the desired level of comfort and good energy efficiency.

The number 24 in the model number indicates the unit is 24 000 btu s divided by 12 000 btu s per ton equals 2 tons. To figure out what size air conditioner you require you first need to determine the amount of btus you require. Instead of subtracting 1 0 instead subtract zero to get the appropriate ac size for hot and arid climates. The max for heat pumps is 25 since it handles both cooling and heating.

For example a typical residential unit is a 2 ton unit that cools 24000 btu hour and a larger 3 ton unit cools 36000 btu hour. Air conditioner sizes are rated in tons of cooling capacity. There are 12 000 btu s per ton. The system capacity will be coded into the model number of the outdoor unit.

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45 000 12 000 3 75. What s the length width and ceiling height. 1 500 x 30 45 000. For example model gsx140241k is a 2 ton unit.

Rule of thumb the maximum size unit you should buy would be 15 over the btus you need for cooling and 40 of the btus for heating. These four things have the biggest impact on what size air conditioning unit you ll need. Most residential units range from 1 5 to 5 tons or 18 000 to 60 000 btu. If you ve ever wondered what size central air unit you need or how to size a window ac unit be aware that square footage is the number one factor.

Are the ceilings and walls insulated. This is done by calculating your square footage. Contact your local trane comfort specialist to learn more about your heating and cooling options. Residential central air conditioners come in a range of sizes from 1 5 ton to 5 ton models.

Back in the days of cheap electricity accurately sizing residential central air conditioners wasn t a high priority. Break up each room into as many squares and rectangles as you need to be able to measure the entire space accurately. 3 75 0 0 3 75 so you d need a 3 5 or a 4 ton sized central air conditioning unit in hot and arid climates southern california arizona etc. This means separating out closets bump outs and hallways each as their own separate area.

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Builders simply covered for any shortfalls by installing an ac unit.