What Size Air Conditioner Do You Really Need?
|Area To Be Cooled (sq. feet)||→ Capacity Needed (BTUs per hour)|
|400 up to 450||10,000|
|450 up to 550||12,000|
|550 up to 700||14,000|
|700 up to 1,000||18,000|
How many square feet does a 24000 BTU air conditioner cool?
BTU Sizing Chart for Mini Split Systems
|Area To Be Cooled||Capacity Needed (BTUs Per Hour)|
|700 to 1,000 square feet||18,000 BTUs|
|1,000 to 1,200 square feet||21,000 BTUs|
|1,200 to 1,400 square feet||23,000 BTUs|
|Up to 1,500 square feet||24,000 BTUs|
Air Conditioning Square Footage Range by Climate Zone
|ZONE 1||ZONE 2|
|1.5 Tons||600 - 900 sf||600 - 950 sf|
|2 Tons||901-1200 sf||951 - 1250 sf|
|2.5 Tons||1201 - 1500 sf||1251 - 1550 sf|
|3 Tons||1501 - 1800 sf||1501 - 1850 sf|
The most common window air conditioning units come in cooling capacities ranging from 5,000 to 12,000 Btu. A 12,000 Btu air conditioner can cool between 450 and 550 square feet of floor space. A 12,000 Btu unit could cool a room 25 feet long by 20 feet wide that has 500 square feet of floor area.
2. Find the correct cooling capacity for your room size
|Area To Be Cooled (square feet)||Capacity Needed (BTUs per hour)|
|150 up to 250||6,000|
|250 up to 300||7,000|
|300 up to 350||8,000|
|350 up to 400||9,000|
1 Ton AC covers 80 to 120 sq.ft area. The 144 sq ft is on border range. If you have many windows or if your room sun facing then buying 1.5 Ton AC is good choice. Below table has summarized capacity chart.
Average AC Unit Prices by Size or Capacity
|Central AC Unit Size||AC & Coil||AC & Coil Installed Cost|
|2.5 Tons, 30,000 btu||$1,525||$2,695|
|3 Tons, 36,000 btu||$1,650||$2,990|
|3.5 Tons, 42,000 btu||$1,780||$3,250|
|4 Tons, 48,000 btu||$1,860||$3,350|
Furnace and Air Conditioner size for a semi-detached 2-storey home
|Semi-detached House square footage *||Furnace Output [BTU/hr]||Air Conditioner size [ton]|
|up to 1500 sq ft||40,000 BTU/hr||1.5 ton|
|1500 to 1800 sq ft||50,000 BTU/hr||up to 2 ton|
|1800 to 2200 sq ft||55,000 BTU/hr||2 ton|
|2200 to 3000 sq ft||60,000 BTU/hr||2.5 ton|
Understand here that the standard practice among HVAC contractors sizing air conditioners for new homes is to use a rule of thumb. It's often in the neighborhood of 1 ton of air conditioning capacity for each 600 square feet of conditioned floor area, usually abbreviated 600 sf/ton.
The formula for figuring this out is pretty straightforward, all you have to do is multiple the length of the room by the width. So if your room is 10 feet by 12 feet, 10 x 12 = 120 square feet.
1. Cooling Capacity
|Area To Be Cooled (Sq. Ft.)||Capacity Needed (BTUs Per Hour)|
|300 to 350 sq. ft.||8,000 BTUs|
|350 to 400 sq. ft.||9,000 BTUs|
|400 to 450 sq. ft.||10,000 BTUs|
|450 to 550 sq. ft.||12,000 BTUs|
A typical 2-ton central air unit that puts out 24,000 BTUs will draw between 15 and 20 amps.
SEER stands for Seasonal Energy Efficiency Ratio. The SEER measures air conditioning and heat pump cooling efficiency, which is calculated by the cooling output for a typical cooling season divided by the total electric energy input during the same time frame. A higher SEER rating means greater energy efficiency.
The right air conditioner helps you cool a room efficiently. You also need to know the air conditioner's BTU (British Thermal Unit) rating, which indicates the amount of heat it can remove from a room. A higher number means more cooling power for a larger room.
Homeowners can pay between $500 and $4,000 for central air conditioning. The final cost will depend on the unit, additional installation items such as ductwork and the professional's installation rates. Here are some additional factors that will determine the kind of system you will need, as well as its price.
To do so, use a tape measure to determine the room's length and width. Then multiply the length by the width to get your square footage. For instance, if the room is 12 feet wide and 12 feet long, you will need enough flooring for 144 square feet (12×12=144).
A refrigeration ton is approximately equivalent to 12,000 BTU/h or 3.5 kW. Air-conditioning and refrigeration equipment capacity in the U.S. is often specified in "tons" (of refrigeration). Many manufacturers also specify capacity in BTU/h, especially when specifying the performance of smaller equipment.
Multiply the total square footage to be heated by the heating factor. If you live in a 2,500 square foot home and a climate zone with a heating factor of 40 BTUs per square foot, you need a furnace with an output of 100,000 BTUs per hour.
A basic rule of thumb is that it takes 30 BTUs for every 1,000 square feet. At the most basic level, if you have a 1,000 square foot house, you'll look for a furnace that has 30,000 BTU output.
SEER stands for Seasonal Energy Efficiency Ratio. It's a measurement of an air conditioner's cooling capacity to power input, or simply, the ratio of cooling produced (in BTUs) divided by the amount of electricity used (in watts). The higher the SEER rating means the greater the unit's efficiency.
Assume you have a rectangular area such as a room and, for example, you want to calculate the square footage area for flooring or carpet. The way to calculate a rectangular area is by measuring the length and width of your area then multiplying those two numbers together to get the area in feet squared (ft2).