Qmark CDFSE surface enclosures are designed to mount flat on the ceiling and extend only 6 in. into the room CDFRE recessed enclosures have no protrusions outside recess box, allowing the heater to recess only 7 in. into ceiling space. Mounts in T-Bar or permanent ceiling with trim ring 208V and 240V heaters can be field-converted from single- to three-phase operation. 5,000-watt heater can be field-converted to 3,800 or 2,500 watts and 4,000-watt heater to 3,000 or 2,000 watts BMS-compatible with use of relays Three adjustable airflow patterns from 14 ft. ceilings: wide, narrow or asymmetrical patterns Automatic fan delay eliminates cold drafts on start-up and discharges residual heat from the heater body during shut down Automatic thermal cutout: shuts off the heater in the event of over-heating and reactivates heater when temperature returns to normal Easy installation: Thumb pins align and temporarily *