Ventilation Guidelines

With temperatures fluctuating this time of year, ventilation can be tricky business. ¬†Here’s some basic guidelines and checklists to keep your pigs healthy and you stress free.

room temperature curve guidelines

cfm output by fan
















Curtain Barn

1. Spread fans 1 degree per 10 CFM and max of 4 degree spread

2. Delay to drop curtain 2 degree after fans maxed out

3. Curtain timer

1. Off = 3 minutes

2. On = XX second to move 2″ to 3″ (site – specific calculation.)

4. Curtains move together, off probe average

Tunnel Barn

1. Fan spread = 10-12 degrees

2. Delay 3 degrees to go into tunnel

3. Leave in tunnel for 2 degrees

4. Target 300 ft./minute air speed in tunnel

5. Target <4 degree spread from end to end

6. Inlets close to 10% open in second stage tunnel setting


For a printable version of the information above with an easy Spring Ventliation Checklist, click here.

For additional questions on prepping your barn for spring, contact Hal Schmidt at 507.381.1340 or