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Casals > Ventilation tools

Calculation help

Tools to help you in the design of installations with fans, both industrial and building ventilation.
 
Among these documents you will find:
  • A chart for determining the air resistance in sections of straight circular ducts made of sheet, in function of diameter and speed of air passage through the duct.
  • Table of equivalences between circular and rectangular duct based on the Huesbsher equation.
  • Load loss of accessories.
  • Similarity rules for fans.

Calculation help

Online pressure drop and air-flow calculations

Calculation of flow rate for air renewals according to type of premises

Calculation of flow rate for air renewals according to type of premises:

This tool allows you to calculate online the flow rate required for the ventilation of a premise based on a given number of standard or customised air renewals.

> more information
Extraction hood airflow calculation

Extraction hood airflow calculation:

This tool allows you to calculate the flow rate to be extracted from a kitchen hood taking into account its open sides and dimensions.

> more information

Help documents

Load losses

Load losses:

Chart for determining the air resistance in circular ducts made of sheet

> more information
Calculation of the equivalent hydraulic diameter

Calculation of the equivalent hydraulic diameter:

Equivalence table between circular and rectangular duct diameter to calculate the load loss

> more information
Load loss calculation in accessories

Load loss calculation in accessories:

Calculation of the load loss caused by an accessory in an installation with fans.

> more information
Fan laws

Fan laws:

Fan laws to determine the features of a fan similar to another tested under standard conditions.

> more information
Air change rates in typical rooms and buildings

Air change rates in typical rooms and buildings:

How to calculate the renovations per hour for a typical premise? Air renovation in farms, stables, gyms, kitchens, laundry rooms, libraries, changing rooms, etc.

> more information
Calculation of correct flow rate for fireplaces smoke extraction

Calculation of correct flow rate for fireplaces smoke extraction:

What should be taken into account to install a fan that fuels the circulation of a fireplace, barbecue or home and prevent smoke from filling the room?

> more information
Constant airflow calculation for household ventilation

Constant airflow calculation for household ventilation:

How to calculate the necessary extraction flow for a house taking into account the number of rooms and type of rooms.

> more information
Forage dehydrators, how to calculate your ventilation system

Forage dehydrators, how to calculate your ventilation system:

Proper ventilation system design in a forage dehydrator is crucial to ensuring process efficiency and the quality of the final product. In this guide by Casals Ventilación, we show you how to perform the necessary calculations to determine the type and number of fans required.

> more information
Building security systems in case of fire
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