# Quick Answer: How Many CFM Do I Need Per Room?

## How many CFM do I need for a 12×12 room?

The rule of thumb is that you need at least 1 CFM per square foot of room area..

## How many CFM do I need for 600 square feet?

As a practical example, if your room has a square footage of 600 square feet with three windows and two inhabitants, you need 18,800 BUT to cool the room. When divided by 30, the result indicates you need an air conditioner capable of 627 CFM. An air conditioner’s capacity is measured in BTUs and CFMs.

## How many CFM does a 6 inch duct have?

100 CFM“For example, most techs will tell you that a 6” duct will provide about 100 CFM.”

## How many CFM is a kW?

The kilowatts unit number 0.048 kW converts to 1 atm cfm, one atmosphere cubic foot per minute.

## How do you calculate cfm of air flow?

To calculate Air Flow in Cubic Feet per Minute (CFM), determine the Flow Velocity in feet per minute, then multiply this figure by the Duct Cross Sectional Area.

## How many CFM are in a BTU?

Now if you want to reduce theoretical concepts down to rules of thumb, the standard volume flow rate per unit of power in the HVAC industry is 400 cfm per ton, and a ton is 12,000 BTU’s per hour, so 400 cfm per 12,000 BTU’s per hour of cooling capacity.

## How do you calculate CFM for a room?

How to Calculate the CFM of a RoomMeasure the room’s width and length. … Multiply the three measurements from step 1 to determine the cubic footage of the room. … Multiply the cubic volume of the room by the number of times you want the air to turn over or exchange in an hour. … Divide your answer from step 3 by 60 to calculate CFM.

## How many CFM do I need for 1000 square feet?

50 CFMHeat and energy recovery ventilatorsTotal area of home (square feet)Continuous ventilation rate1,000 square feet50 CFM2,000 square feet100 CFM3,000 square feet150 CFM

## Is more CFM better?

A: Airflow quantifies the amount of air a ceiling fan delivers and is measured in CFM which stands for cubic feet per minute. … This means that the higher the CFM, the more efficient the fan, and the more air it moves.