An energy efficient 12-crate farrowing house was designed and evaluated on a South Carolina swine farm. Pig performance was 9.2 pigs weaned per litter with 5% mortality, both were better than the national average. Energy consumption was less than estimates for a conventional 12-crate farrowing house with estimates of savings ranging between $288 and $467. Winter operation requires extra herdsman attention during farrowing periods.