"Engineers and on-farm innovators have tried for years to recover heated ventilation air before spilling it into the environment. Dust, gases and moisture combined make this a big challenge. The very best attempt at this is the AirWorks® Building System, where heat recovery is a large component of a specialty barn design and ventilation system..."

-Excerpt from Building Designs to Mitigate Environmental, Energy Concerns, National Hog Farmer, April 15, 2010

"(An) option being considered is to construct wean-finish facilities with smaller rooms. Each of the rooms is all-in/all-out, but the overall facility is never empty. The advantage of this system (often with 16 rooms) is that pig sales can occur from multiple rooms, so you can always put the heaviest pigs on a load to slaughter. You can clean and fill a room (often by double stocking) while you are still selling from other rooms, meaning facility utilization goes up. If you receive weaned pigs every 4 weeks, vs 2x per year in a typical wean-finish facility, market risk management is easier as you have pigs for sale in all months of the year."

-Excerpt from Is there an optimal production unit size?, Brumm Speaks Out, April 21, 2010