Heatcraft Back Bar Unit Coolers are compact, wall-mounted units whose low height makes them ideal for undercounter reach-in or drawer-type fixtures. The unit draws air from the bottom and discharges air out of the front. An optional air deflector, which can be field formed to direct air where needed, is included and can be mounted over the center of the fan to direct air up and out. The BBL low temperature model comes with an automatic electric defrost option. The BBL has a sheath heater embedded in the bottom fin surface for efficient and fast defrosting. A drain pan heater is included to ensure complete condensate drainage.