Which of the following is an example of how active and passive solar heating designs differ? O Passive solar heating systems work during the day, and active solar heating systems work during the night. O Active solar heating systems are retrofitted in old buildings, and passive solar heating systems are created in new buildings. Active solar heating systems require pumps and pipes, and passive solar heating systems do not. Passive solar heating systems work best during the summer, and active solar heating systems work best during the winter