U.S. Pat. No. 7,866,743 (Russell et al) titled “Temperature Adjustable Chair” discloses a chair with a thermoelectric cooler that can selectively generate or remove heat.
U.S. Pat. No. 9,155,398 (Arens et al) titled “Heated and Cooled Chair Apparatus” discloses a chair that can be heated and cooled, with an occupancy sensor that switches off the heating or cooling apparatus when the chair is unoccupied.