Features of DFC/IDFC-Series Custom Units Wide Range of Applications: Units can be designed to heat, cool, ventilate, humidify, dehumidify or filter. Efficient Operation: Units are customized to address needs of facility. In-House Expertise: All design work performed by staff who work one-on-one with client. Rigid, Heavy-Duty Construction: Built on unibody base design with welded double wall construction cabinet. Improved Indoor Air Quality: Helps dilute and expel airborne contaminants making exhaust systems operated more efficiently. Flexibility: Variety of outdoor air/return air arrangements available.