Heat recovery systems and solar panels are two options to save energy and cost for heating. Producer experience in the nursery allowed the ventilation rate to be raised, obtained consistent and the proper inlet air speed when a duct was installed, and reduced the supplementary heat needed. In grow finish rooms, a heat exchanger allowed minimum ventilation to be run with no supplementary heat needed, and the best results were when an inlet duct was used and a portable heater used for the first few days. Heat recovery systems also allow gestation and breeding to have good air quality and temperature without additional heating. Individual stalls should have a duct system, but group housed sow systems can just use a diffuser. Solar walls in all rooms are beginning to be explored, and may provide heat that allows ventilation to be improved.