Ideal Airflow Calculator for Indoor Spaces

With rising global warming concerns, modern building structures are designed to be energy-efficient. Almost all commercial spaces, whether compact or large, use HVACs. However, improper air ventilation in such spaces may lead to poor air quality, directly impacting our health.

Based on 5,000+ reviews from

What is the importance of Airflow?

It is critical to manage the airflow within closed spaces for HVACs to function efficiently. There are many ways to regulate the airflow in a confined space, ventilation being one of the most efficient approaches. Ideally, to ensure a healthy airflow, the total amount of air being pulled into a space must be equivalent to the amount of air being ducted out. Managing airflow improves the quality of air, and it is significant because closed spaces do not have other sources of ventilation.

Air changes per hour or ACH is a significant factor in the evaluation of airflow. ACH refers to the number of times the air within a space is entirely replaced. In simpler terms, ACH specifies how many times the HVAC can completely suction out and fill out the air in your room. An HVAC system with ACH capacity of 5 indicates that it replaces the air within your room five times in one hour. For a 10 ft x 10 ft x 10 ft cubical space, the ideal airflow for an HVAC with an ACH of 1 should be 16.67 cubic feet per minute or 16.67 CFM, as estimated by our Airflow Calculator below.  

In HVAC, what does ACH stand for?

Air changes per hour or ACH is a significant factor in the evaluation of airflow. ACH refers to the number of times the air within a space is entirely replaced. In simpler terms, ACH specifies how many times the HVAC can completely suction out and fill out the air in your room. An HVAC system with ACH capacity of 5 indicates that it replaces the air within your room five times in one hour. For a 10 ft x 10 ft x 10 ft cubical space, the ideal airflow for an HVAC with an ACH of 1 should be 16.67 cubic feet per minute or 16.67 CFM, as estimated by our Airflow Calculator below.  

Overview

Why use our Airflow calculator?

  • Ease of use
  • Increase HVAC efficiency
  • Flexibility for different room dimensions
  • Quick and accurate results
Resource tags

How to Get the Free Download

Get the calculator sent to your inbox and also check out ArcSite's pro HVAC estimate software on a free trial.

Where should we send it?

You're a few seconds away from your free download!

First name *
Last name *
Email *
By submitting this form you agree with our Terms and Privacy Policy

Trusted by the Pros. Honored for Innovation.

Based on 13,000+ reviews from

FAQs

Q. What is Airflow?

A. Airflow is measured in cubic feet per minute or cfm.

Q. How to measure airflow?

A. Airflow is the total air flowing through your HVAC system. Knowing the right airflow for your homes helps improve the performance of cooling systems. A. Airflow is the total volume of your space multiplied by the air changes per hour.

Q. What is the unit of airflow?

Airflow is measured in cubic feet per minute or cfm.