Coleman Mach 9430E715 RV Air Distribution Box Heat Strip Ready w/ Manual ControlsThis is the Air Distribution Box (ADB) for the interior of the RV. It connects to the air conditioner with four bolts, sealing the A/C to the roof. The ADB also acts as a divider for the interiors intake and discharge. The ceiling controls allow for simpler wiring and the convenience of the controls be easily accessible.Manual Controls: Adjust temperature and fan speed with simple turn knobsLow Profile Design: (just 2″ thick) leaves more headroom in the cabinSimple Wiring: 12V not required, only 115V AC power is necessaryHeat-Ready Design: Prepped for an optional electric heat strip (sold separately and not compatible with Mach 8 models), allowing you to add heating functionality to your air conditioning system for year-round comfortNon-Ducted ApplicationsA non-ducted Air Distribution Box is a ceiling assembly designed for RVs that do not have a built-in ducted air system