Each floor had four glass sunrooms and ornate furnishings throughout. The downstairs contains three sunrooms facing south and the river. In cooler regions they were rapidly adopted to porches and sunrooms. Each floor of the hospital had three sunrooms. An affiliated company of J. Sussman, Inc., Sunbilt Solar Products, manufactures custom sunrooms and greenhouses. Specialized flooring, including radiant heat, may be adapted to both attached and integrated sunrooms. Sunrooms may feature passive solar building design to heat and illuminate them.