Energy conservation is a reason to consider solar heat for swine buildings. Money must be spent to insulate a building before solar heating can be effective. Also, check the winter ventilation rate to prevent overventilation, wasting much valuable heat. Before purchasing a solar energy system know the economics associated with this type of system. Two types of systems are used to collect solar energy for swine buildings – passive and active. Solar planning in terms of building design, collector placement, air leaks/insulation and ventilation are all outlined by the author.