2005 Evapco Stacked Freon Freezer Evaporator Blower. Model: TFCS6 74123-750M. Approximate rated capacity: 31 tons using Freon R-507 at a 15°TD in a -20°F room with a -35°F SST. Features include the patented, Thermal Pak aluminum finned coil with 73.5, sq. ft. face area, and 19.8 cu. ft. of coil volume. Fins are 12 rows deep with 3 fins per inch. Other feature include: stainless steel tubes and top water defrost. Approximate overall dimensions: 13 ft. 6 in. L x 3 ft. W x 5 ft.10 in. H.