Ventilation Calculation

Ventilation Calculation

Air Exchange

Invalid input
Enter dimensions in mm:
Invalid input
Invalid input
Invalid input
Invalid input
Invalid input
Invalid input

Calculation Methodology:

Ventilation calculation by air exchange rate

L = n * S * N, where:

L — required performance m3/h;

n — air exchange rate;

S — room area;

N — room height, m.

Ventilation performance calculation by number of people

L = N * Lnorm, where:

L — performance m3/h;

N — number of people in the room;

Lnorm — standard air consumption per person:

at rest — 20 m3/h;

for office work — 40 m3/h;

for active work — 60 m3/h.

Information

Ventilation calculation is a precise and diligent process that demands the consideration of multiple critical factors. A fundamental parameter in these computations is the “air exchange rate,” which quantifies the complete turnover of air masses per unit of time (typically per hour). Depending on the room’s design and function, this measure may emphasize either the frequency of air renewals or the volumetric air exchange.

Ambient air temperature during colder months is also taken into account to counterbalance the reduced humidity when heating systems are active. Various types of ventilation systems—such as natural, supply, exhaust, and mechanical—each introduce unique calculation nuances. Generally, this comprehensive evaluation is challenging and requires meticulous analysis. Expert research has demonstrated that selecting equipment capable of meeting the required airflow volume is paramount before fine-tuning the air exchange rate in line with building standards and regulatory codes.

The technical design of an effective ventilation system begins with a detailed calculation process that can be broken down into five main steps:

  1. Evaluating the performance and capacity of the ventilation system.
  2. Determining acceptable noise levels while verifying the facility’s electrical capacity.
  3. Performing aerodynamic computations to establish resistance forces and to select optimal duct sizes and diameters.
  4. Calculating the thermal output required for the heating component.
  5. Selecting the appropriate ventilation equipment (including fans, heaters, and noise dampeners) based on noise control standards, resistance criteria, volumetric flow rates, and the necessary pre-heating of incoming air.

We have developed an online area and volume calculator that simplifies the evaluation of both natural and mechanical ventilation systems through just a few intuitive steps. By simply entering the initial data, the computation is executed instantly using automated formulas to ensure precision—whether addressing supply or exhaust systems. Recognizing that efficient room ventilation is a critical aspect of construction, our tool delivers comprehensive and reliable assessments for private residences as well as commercial facilities.

What benefits does our calculator offer you?

  • Automated calculations that virtually eliminate the potential for errors
  • Considerable time savings when computing such essential parameters as airflow requirements
  • An intuitive interface designed to be easily navigated by both novices and industry professionals
  • The flexibility to analyze various ventilation configurations for any room layout

In summary, our ventilation system calculator provides rapid and precise evaluations, even for complex industrial applications, ensuring superior outcomes. With this tool, you can accurately determine the required airflow volume and room area for designing an efficient and effective ventilation system, while also accounting for the utilization efficiency of ventilation equipment and the overall system power needed for optimal performance.

See also: