The Therm-O-Disc B1256559 309837 Heat Sequencer is a central furnace heating system designed for use in homes. With a multicolor design, this model (H10-20 C-30-70 B12565-59) from Therm-O-Disc offers efficient heating solutions for spaces requiring a central furnace system. This product is ideal for those looking to improve their home's heating system with a reliable and trusted brand like Therm-O-Disc.