Temco ARC 52 is the only label I find in this 1997 TW Lewis installed unit. It is gas, with a wall mounted square end turn key, a wall mounted rocker switch. On the inside I find an on-off-pilot turn and press knob. With the key turned all the way to the left, wall rocker switch off, and the pilot knob depressed, I do hear gas. I do not see an ignition button. I do not know the proper layout of the logs. Is there a manal avail? janicekoblinski@yahoo.com