Interior unit The evaporator coil suits inside the furnace plenum. The plenum will be the part of the furnace on both facet of the air handler, in which air is introduced in and despatched back out into the home. Seal up the hole during the wall applying growing polyurethane foam. https://airconditionerinstallatio42963.blogadvize.com/36369886/rumored-buzz-on-restaurant-and-bar-ventilation