NEW AIR CONDITIONERS. Our DTS 3641C (NEMA Type 12) new improved version of our former DTS 3641 indoor cooling units, have the highest Cooling Capasity Per Density (CCPD) available on the market. Housing: galvanized sheet steel. These units are ideal for high heat loads, especially high horsepower drive enclosures. Cover: electrostatically powder coated RAL 7035 (light grey) or ANSI 61 grey. 460 VAC.