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Why is it Necessary to Install the Correct Capacity Air Conditioner?
Before installing an air conditioner, careful consideration and calculations are essential to ensure optimal cooling efficiency and cost savings. Here's why:
+ If the air conditioner's operating capacity is too small for the area it's cooling, it will have to run continuously, resulting in overload, increased power consumption, and reduced lifespan.
+ Conversely, installing an air conditioner with excessive capacity for the space leads to wasteful energy consumption and higher purchase costs.
Reveal 3 Most Accurate Methods to Calculate Air Conditioner Capacity
The formula for calculating air conditioner capacity primarily relies on the area or volume of the space to be cooled. The capacity of the air conditioner is typically measured in BTUs – the British thermal unit.
1. Calculating Air Conditioner Capacity Based on Room Area
The formula for calculating air conditioner capacity based on room area applies to rooms with ceilings averaging 3 meters or lower. This is a common ceiling height seen in Vietnam.
Example: For a room with an area of 15m2, you will have: 15 m2 x 600 BTU = 9,000 BTU. Meaning you should purchase an air conditioner with an operating capacity of 9000 BTU, equivalent to 1HP. Below are some suggestions when buying an air conditioner based on room area:
+ 1 HP air conditioner ~ 9000 BTU: Rooms under 15 m2.
+ Air conditioner 1.5 HP ~ 12,000 BTU: Rooms from 15-20 m2.
+ Air conditioner 2 HP ~ 18,000 BTU: Rooms from 20-30 m2.
+ Air conditioner 2.5 HP ~ 24,000 BTU: Rooms from 30-40 m2.
2. Calculating Air Conditioner Capacity Based on Room Volume
The advantage of calculating air conditioner capacity based on room volume is higher accuracy compared to calculating based on area. You should apply this method when the house has high ceilings, loft rooms open from above,...
Example: For a room with a volume of 50m3, you will have: 50 m3 x 200 BTU = 10,000 BTU. Meaning you should choose an air conditioner 1.5 – 12000 BTU for a room with a volume of 50m3. Below are some suggestions for air conditioner capacity based on room volume you can refer to:
+ Air conditioner 1 HP ~ 9000 BTU: Rooms under 45 m3.
+ Air conditioner 1.5 HP ~ 12,000 BTU: Rooms under 60 m3.
+ Air conditioner 2 HP ~ 18,000 BTU: Rooms under 80 m3.
+ Air conditioner 2.5 HP ~ 24,0000 BTU: Rooms under 120 m3.
3. Calculating Air Conditioner Capacity Based on External Conditions
Both area-based and volume-based AC capacity calculations have overlooked external factors and provide relatively accurate estimations. However, AC operating capacity can be influenced by various external factors such as direct heat sources, building materials, electronic devices in the room, the number of people in the room, windows in the room...
Therefore, you can rely directly on the actual conditions of your room to choose an air conditioner with a capacity larger than 0.5-1 HP based on scenarios: ceiling up to 5m, attic floors, including kitchen, windows facing west and south, rooms with multiple occupants,... The goal is to offset heat loss that will affect the operating capacity of the air conditioner.
Recommended air conditioner capacities in different room spaces
+ 1HP air conditioner: Family room 45m3; café/restaurant 30m3; hotel 35m3; office 45m3. Some 1HP air conditioner models you can consider: Comfee 1 HP SIRIUSB-9E; Beko Inverter 1 HP RSVC09VT; Panasonic Inverter 1 HP CU/CS-PU9XKH-8M; Daikin Inverter 1 HP FTKB25WMVMV; Daikin Inverter 1 HP FTKY25WMVMV…
+ 1.5 HP air conditioner: Family room 60m3; café/restaurant 45m3; hotel 55m3; office 60m3. Some 1.5HP air conditioner models you can consider: Beko Inverter 1.5 HP RSVC12VT; Daikin Inverter 1.5 HP FTKB35WMVMV; Panasonic Inverter 1.5 HP CS-PU12XKH-8M; Funiki Inverter 1.5 HP HIC12TMU.ST3; Panasonic Inverter 1.5 HP CU/CS-XU12XKH-8; LG Inverter 1.5 HP V13WIN new 2023…
+ 2 HP air conditioner: Family room 80m3; café/restaurant 60m3; hotel 70m3; office 80m3. Some 2HP air conditioner models you can consider: Daikin Inverter 2 HP FTKB50WAVMV; Panasonic Inverter 2 HP CS-PU18XKH-8M; Sharp Inverter 2 HP AH-X18XEW; Nagakawa Inverter 2 HP NIS-C18R2H10…
+ 2.5HP air conditioner: Family room 120m3; café/restaurant 80m3; hotel 100m3; office 120m3. Some 2.5HP air conditioner models you can consider: 3 Air Conditioners: LG Inverter 5 HP ATNQ48GMLE7; LG Inverter 5 HP ZTNQ48LMLA0; Daikin Inverter 3 HP FTHF71VVMV; Daikin Inverter 3 HP FTKY71WVMV…
We hope that with the information we've provided above, you now know how to calculate the most accurate air conditioner capacity to easily choose the most suitable air conditioner for your room and living conditions.
