Page 13 of articles about farrowing room

Ventilation – heating and cooling
The purpose of a ventilation system is to remove excessive moisture and heat produced by animals in order to maintain an indoor climate within certain limits

One site and multi-site swine rearing systems
A new proposed system for terms to use in describing the various one site and multi-site production systems that have evolved in the pork production industry, and a simplified system for diagraming various types of pig farms.