Rolling Mill Motor Room/Electrical Equipment Room Air handler is often used in the MRC-4 system. These Units are stand alone and fully wired. Modular design permits engineered units up to 250,000 CFM. Units can include louvered intakes, filters, heat exchangers, cooling coils and a variety of fan types selected in accordance with system pressure and duty requirements. Materials of construction include carbon steel, painted, galvanized steel, stainless steel, aluminum, as well as more exotic alloys where required. Heating may be steam, hot water, gas, oil or electric. Cooling may be refrigerant, chilled water, or evaporative types. Filtration from in all ASHRAE MERV ratings available.