Reduce wasted energy and keep food cold during overnight hours by using this Avantco night curtain in conjunction with your Avantco WHAC-63 or BHAC-63 63" air curtain merchandiser. This night cover is designed to cover most of the front of your air curtain merchandiser so that you don't need to worry about cold air escaping during off hours. It also helps to make sure your food stays cold between shifts. Merchandisers require 2 night curtains to cover the entire unit.