FLAPDUCT SYSTEM

Improve dairy calf air quality with adjustable ventilation

• For Multiple Calves

• For Indoor Operations

Solve indoor barn airflow challenges with adjustable, season-ready ventilation control

Solve inconsistent airflow, drafts, and stale air in your calf barn with a system designed for precision control. The FLAP DUCT® Ventilation System lets you easily adjust airflow to match changing seasonal conditions, ensuring optimal air quality year-round.

Deliver gentle, draft-free fresh air in cold weather or high-speed cooling when temperatures rise—all with a simple lever adjustment. The result is a healthier, more consistent environment that supports stronger, more comfortable dairy calves.

Ventilation in Cold Weather

Lower the lever to adjust the cutouts in the inner membrane, restricting airflow through smaller micro-holes to deliver slow, non-drafty fresh air that helps protect young livestock from winter chills.

Variable speed fan set to LOW
Air flows through SMALL holes
Gently delivers slow, non-drafty fresh air to calves

Ventilation in Hot Weather

Variable speed fan set to HIGH
Air flows through LARGER holes
Delivers higher speed, cooler air improving air quality and despersing flies

Controlling Airflow Options

Hands-On Control:
Simply lower the lever as temperatures drop, and raise it as temperatures increase.

Hands-Free Control:
Connect to a smart thermostat for fully automated, hands-free ventilation control.

Ventilation Frequently Asked Questions

How do these systems work?

Positive pressure systems use a fan located at the end of the barn to deliver fresh outside air along a heavy-duty fabric tube. The tube carries fresh air the length of the barn and discharges it through holes located above each pen. Every tube is custom designed to each barn’s unique pen layout.

What are these positive pressure tubes made of?

Two materials are available based on the application required. Most commonly, the tube is made of a durable, ripstop high-density polyethylene. If the tube will be exposed to direct sunlight, a vinyl material is available.

How long can the tube be?

Experience has shown an operating length of 200′ / 61m for a single fan system is possible. Longer runs can be accomplished but will require specialized fan equipment and advanced design considerations. In most situations, a tube can ventilate a width of 20-25′ / 6-7.6m.

Won’t this added ventilation make it too cold in the winter?

Great care is taken in the design of each ventilation system to ensure that fresh air is delivered to the calf WITHOUT CREATING A DRAFT in cold weather. A properly designed ventilation system delivers a blanket of fresh air that gently settles over each calf. The use of variable speed fans and the internal membrane technology found in FLIP DUCT and FLAP DUCT offer unmatched air speed control.

I have fans in my barn already, isn’t that enough?

Having fans in a barn does not mean the calf pens are adequately ventilated. Often the air inside the calf pen is poorly ventilated despite having numerous fans throughout the barn. If you are unsure about the ventilation status of your calf barn, call and schedule a calf barn ventilation evaluation with Dr. Leiterman.

Are these systems easy to install?

Yes! The positive pressure tube system comes complete from the manufacturer with everything necessary for installation along with an installation diagram.