HVLS Fan Calculator

Check the number of fans required in your premises.

Note : Unit of measurement - Meter

Length

+ -

Width

+ -

Height

+ -

Fan Size (FT)

Name

Phone Number

Disclaimer : Actual quantity may vary depending on the obstructions and type of work inside the premises.

Industrial HVLS fan size-based selection

HVLS Fan Calculator: Estimate How Many Fans You Need

Use the KRISSVENT HVLS Fan Calculator to estimate the number of fans needed for a warehouse, factory or other large indoor space. Enter your building dimensions and choose a fan diameter to get a starting estimate for planning your installation.

Note: Enter length, width and height in metres. Select the fan diameter in feet. Results are estimates and may change after an on-site layout and clearance review.

How to Use the HVLS Fan Calculator

Get an initial estimate in four simple steps.

Enter length and width

Measure the area where airflow is needed, in metres.

Add building height

Enter the measured height of the building in metres.

Choose a fan size

Select the preferred fan diameter in feet.

View your estimate

Fill in your contact details and submit to see the total fans required.

How Is the Required Number of Fans Estimated?

Start with your floor area. It tells you how much space needs air circulation, but it does not determine the fan count on its own.

The final quantity also depends on fan diameter, mounting height and whether air can move freely through the building.

Floor Area = Length × Width

60 m × 30 m = 1,800 m²

Example: a warehouse measuring 60 m by 30 m has a floor area of 1,800 m². This is not the number of fans.

What Can Change Your Fan Estimate?

Two buildings with the same floor area may need different arrangements. Review these factors before finalising your selection.

Floor Area

Defines the total space requiring airflow.

Mounting Height

Decides whether a model has suitable installation clearance.

Fan Diameter

Affects how air moves across an open area.

Obstructions

Racks, machinery and partitions can interrupt airflow.

Work Zones

Show where circulation and fan placement matter most.

KRISSVENT HVLS Fan Sizes & Installation Heights

Compare the fan diameters available in the calculator with the published installation height range of each model.

Fan Diameter	Model	Installation Height
12 ft	DX 3.6 E	4–8 m
16 ft	DX 5.0	5–11 m
18 ft	DX 5.5	5–11 m
20 ft	DX 6.1	6–15 m
24 ft	DX 7.3	8–20 m

Installation height ranges are model-specific and are not coverage areas or minimum ceiling heights. See the KRISSVENT HVLS fan specifications before ordering.