Replaces Advent / Atwood
Advent and Atwood Air Command rooftop units share the standard 14 x 14 in opening, so a Coleman-Mach replaces one without roof work. Replacement parts for the old units are hard to find, which is usually what brings people here. The Mach 3 Plus replaces a 13,500 BTU Advent; the Mach 15 Plus replaces a 15,000. Complete kits include the Coleman-Mach ceiling assembly and control, since the Advent parts do not carry over.
