As spring arrives and temperatures begin to rise, it is an ideal time to thoroughly inspect and maintain your swine barn’s ventilation system. A properly functioning ventilation system is essential for maintaining animal comfort, controlling humidity and gas buildup, reducing heat stress in warm weather, and ultimately supporting pig health and performance as the seasons change.

Why Spring Maintenance Matters
Spring brings unpredictable weather with wide temperature swings, which can challenge your ventilation system’s ability to keep pigs comfortably warm at night and cool during the day. Making adjustments now helps ensure the system operates efficiently as warmer temperatures and higher humidity increase.

Key Areas to Inspect and Maintain
1. Fans and Motors
• Clean thoroughly: Remove dust, dirt, and debris from fan blades, housings, and shutters — buildup can reduce airflow and fan efficiency.

• Check belts and bearings: Look for belt wear or improper tension, and ensure bearings are properly greased.

• Test operation: Run fans through all stages to confirm they start and stop correctly under controller commands.

2. Controllers and Sensors
• Calibrate and test: Ensure controllers are properly programmed for seasonal conditions and respond appropriately to temperature changes.

• Check sensors and thermostats: Spring’s variable weather makes accurate sensing crucial for balancing airflow and heat.

3. Air Inlets and Static Pressure
• Inspect for obstructions: Clean and ensure inlets are free of dust and debris so air flows smoothly.

• Balance inlet openings: Adjust them to avoid drafts over the pigs while ensuring sufficient fresh air exchange.

• Static pressure check: Proper static pressure helps maintain controlled air speeds that mix fresh air throughout the barn.

4. Sidewall Curtains and Vent Openings
• Remove winter covers: Open soffits and remove winter protection materials so ventilation can transition to cooling mode.

• Verify smooth operation: Ensure curtains move freely and that curtain run times/ settings are appropriate for spring thermal conditions.

5. Cooling Systems
• Evaporative cooling: Inspect pads and associated equipment if your barn uses evaporative cooling to reduce summer heat load.

• Fogging/misting systems: Check lines, nozzles, and water pressure now so they’re ready when humidity and heat increase.

Additional Best Practices for Spring Ventilation
Reduce Moisture Buildup
High humidity and moisture produced by animals
can lead to gas buildup and respiratory
issues. Improve manure handling and ensure proper drain flow to minimize moisture and ammonia levels.

Maintain Heaters and Backup Systems
While spring days can be warm, cool nights may still occur. Make sure heaters and thermostats are working properly to prevent drafts
and keep pigs comfortable during temperature swings.

Biosecurity and Barn Environment
Good ventilation contributes to biosecurity by reducing dust and airborne pathogens. Regularly monitor dust accumulation and consider air quality sensors for ammonia or CO2 if available.

Plan for Severe Weather
Spring storms and power outages can disrupt ventilation. Test emergency generators and alarms, and keep backup parts (fuses, belts, fan guards, etc.) on hand to reduce downtime.

Why Regular Inspections Pay Off
Conducting a seasonal ventilation review does more than just catch problems early — it can help:
• Lower electrical and heating costs
• Improve pig comfort and growth rates
• Extend the lifespan of equipment
• Reduce risks associated with heat stress and gas exposure

Spring maintenance sets a strong foundation for summer conditions and helps ensure year-round animal welfare and operational efficiency. Consult page 37 of The Advocator for a thorough inspection and maintenance checklist and contact the experts at Sioux Nation Ag Center for help with this important aspect of your operation.