There are several options for heating a sunroom during cooler months, including expanding the home's HVAC vents, installing baseboard or underfloor heating, or using a space heater. Baseboard heaters circulate warm air along the room's edges through convection, while underfloor heating warms the floor directly to transmit heat through the body. Portable space heaters provide economical heating of a sunroom but must be removed during warm weather. Properly selecting glass with a higher solar heat gain coefficient can also help exploit passive solar heating in the sunroom.