A room is 12` x 6` with an 8` ceiling. What is the maximum BTU per hour input rating of an appliance that may be installed when infiltration air is taken from the room where the appliance is installed?

A room is 12` x 6` with an 8` ceiling. What is the maximum BTU per hour input rating of an appliance that may be installed when infiltration air is taken from the room where the appliance is installed?