The direct-fired L.B. White® Guardian® is designed to protect pig producers' investments when the weather turns cold. Guardian pig building heaters provide consistent, dependable heat that helps control pig house climate. The direct-fired L.B. White® Classic® forced air heater is a reliable pilot ignition design that pig producers have relied on for over 40 years. Both Guardian and Classic series heaters can be used in all swine production environments and phases including gestation, nursery, and wean-to-finish.