14.7kw or 50,000 btu.unlike many newer coleman furnaces, the coleman 3500a series was not built to be air. Coleman furnaces come with a standard. Web a wiring diagram provides a useful visual reference guide and can simplify the process of identifying potential faults. Web a wiring diagram is a detailed visual representation of the electrical system in your furnace, and it shows how each component is connected. Web read coleman central electric furnace model 3500a816 manual by ruthmalik3468 on issuu and browse thousands of other publications on our platform.