Louver Free Area Calculator
Do you want to determine the percentage of free area in a louver system? The louver free area calculator can simplifies the calculation process. Simply enter the input the total louver area and wall opening area into the calculator to find louver free area.
What is Louver Free Area?
Louver free area is the part of the louver through which air can pass, excluding obstructions like blades and frames. This is crucial for proper ventilation in HVAC systems.
How to Use the Calculator
Using the Louver Free Area Calculator is straightforward:
1. Basic Calculator:
Input any two of these values:


 Total Louver Area (TOLA) in square units
 Wall Opening Area (WOA) in square units
 Louver Free Area (LFR) in percentage

The calculator will compute the louver free area.
2. Advanced Calculator:
For more complex calculations involving multiple louver areas:
Enter:



 Total Louver Area 1 (TOLA1) in square units
 Total Louver Area 2 (TOLA2) in square units
 Combined Wall Opening Area (WOA) in square units


The calculator will provide the combined Louver Free Area.
Calculation Formula
The formula used in the Louver Free Area Calculator is:
$\text{LFR} = \frac{\text{TOLA}}{\text{WOA}} \times 100$
Variables:
LFR  is the louver free area (%) 
TOLA  is the total open area of the louver after subtracting obstructions, blades, and frames (sq units) 
WOA  is the wall opening area (sq units) 
Example Calculations
Here are examples demonstrating how the calculator computes values:
1. Basic Calculation Example:
Input  Value 

TOLA (sq ft)  25 
WOA (sq ft)  50 
LFR (%)  ? 
Calculation:
$\text{LFR} = \frac{25}{50} \times 100 = 50\%$
2. Advanced Calculation Example:
Input  Value 

TOLA1 (sq ft)  15 
TOLA2 (sq ft)  10 
Combined WOA (sq ft)  50 
Combined LFR (%)  ? 
Calculation:
$\text{Combined TOLA} = 15 + 10 = 25$
FAQs
Why should I know about the Louver Free Area?
It enables effective airflow and ventilation in HVAC systems.
Can the calculator accommodate more than one louver?
Yes, use the advanced calculator for multiple louver areas.
What units should I use for the input values?
Ensure all input quantities are in consistent units, like square feet or square meter.
I hope you found the louver free are calculator, a best tool for your project. It is a useful tool for HVAC professionals and builders. Please feel free to ask any question regarding this tool.