Achieving Optimal Air Exchanges per Hour for Different Room Types

Creating a comfortable and healthy indoor environment is a top priority for any space, be it a residential dwelling, an office, a school, or a healthcare facility. Adequate ventilation is a key factor in achieving this goal.  Ventilation ensures a continuous supply of fresh air and helps remove pollutants. In this blog article, we will explore the recommended air exchanges per hour (ACH) for various room types to assist you in optimizing ventilation. Need help call 07 3271 4415 or use the Air Changes Per Hour Calculator below.

Residential Spaces:

Bedrooms:  For a restful sleep and a rejuvenating atmosphere, it is recommended to aim for an air exchange of 0.5 to 1.5 ACH in bedrooms. This range strikes a balance between maintaining indoor air quality and preventing excessive heat loss or gain.
Living Rooms: In living areas where families gather and spend significant time, a recommended air exchange per hour falls within 1 to 2 ACH. This rate supports fresh air circulation, while ensuring a pleasant environment for relaxation and socializing.

Offices and Commercial Spaces:

Office Spaces: In offices, where productivity and well-being are paramount, a recommended air exchange per hour ranges from 3 to 5 ACH. This rate promotes good indoor air quality, helping employees stay focused, alert, and comfortable throughout the day.
Meeting Rooms: For meeting rooms, where discussions and presentations take place, it is advisable to achieve an air exchange of 4 to 6 ACH. This higher rate ensures adequate ventilation during periods of increased occupancy, facilitating clearer thinking and effective communication.

Educational Institutions:Air changes per hour

Classrooms: To create an optimal learning environment, classrooms should strive for an air exchange per hour between 4 to 6 ACH. This range helps reduce the concentration of pollutants and supports students’ cognitive function. It also fosters a healthy atmosphere for teaching and learning.
Laboratories: Given the nature of experiments and potential exposure to hazardous substances, laboratories require enhanced ventilation. A recommended air exchange rate for labs is typically from 6 to 12 ACH. This also depends on the specific requirements of the experiments and the level of containment needed.

Healthcare Facilities:

Hospitals: Hospitals demand rigorous ventilation measures to maintain patient health and prevent the spread of infections. General patient rooms benefit from an air exchange of 4 to 6 ACH. While operating rooms necessitate a higher rate of 15 to 20 ACH and consequently minimize the risk of airborne contaminants.
Waiting Areas: To create a comfortable environment for patients and visitors, waiting areas in healthcare facilities should aim for an air exchange per hour of approximately 4 to 6 ACH. This range promotes fresh air circulation, reducing stuffiness and providing a welcoming atmosphere.

Restaurants and Food Service Areas:

Dining Areas: For enjoyable dining experiences, dining areas in restaurants are recommended to achieve an air exchange rate from 6 to 8 ACH. This rate helps eliminate cooking odors, maintains air quality, and ensures a pleasant ambiance for customers.
Kitchen and Food Preparation Areas: Due to the nature of food preparation, kitchens and food service areas require robust ventilation. Air exchanges of 10 to 20 ACH helps effectively remove heat, smoke, grease, and odors, promoting a safe working environment.


Appropriate ventilation, as indicated by recommended air exchanges per hour, is vital in creating a comfortable and healthy indoor environment. By implementing these guidelines, you can enhance air quality, promote well-being, and improve the overall experience for occupants and visitors. In residential spaces, offices, educational institutions, and healthcare facilities, optimizing ventilation contributes to a pleasant and thriving environment for everyone.  Need help call 07 3271 4415