# Air Exchange Rates For Various Types Of Premises. Online Ventilation Calculator

## Video: Air Exchange Rates For Various Types Of Premises. Online Ventilation Calculator

The online calculator for calculating the hood for certain rooms, depending on the purpose, will allow you to choose the right fan according to the performance and air exchange parameters. Calculation of m 3 / h of fan performance depending on the rate of air exchange in an apartment in an office or other household premises of different directions. The correct calculation of ventilation is based on the correct choice of a fan that is suitable in terms of such parameters as productivity in terms of the pumped volume of air and measured in cubic meters per hour. The main indicator is the calculation of the duct performance and the frequency of air exchange cycles. The air exchange rate shows how many times the complete air change in the room occurs during an hour. Examples and air exchange numbers are translated in the table below.

## Room air exchange rate calculator

 Room area, m 2: Room height, m: Air exchange rate: Required productivity (m 3 / h):

Calculators from wpcalc.com

### L = n * S * H, where:

L is the required productivity m 3 / h;

n is the rate of air exchange;

S is the area of the room;

H - room height, m.

## What determines the frequency of air exchange

At certain values, air exchange is calculated according to the standard rate. Regardless of the type of room, the formula for calculating air exchange by frequency will be the same:

L = V pom ⋅ K p (m 3 / h), where V pom - room volume, m 3;

K p - standard rate of air exchange, 1 / h.

The volume of the room must be known, while the multiplicity number is regulated by the norms. These include building codes SNiP 2.08.01-89, sanitary and hygienic standards and others.

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