Profile: Durable Machinery Company, LLC. designs and manufactures harsh-duty standardized products for severe industrial, marine & military conditions. We focus on corrosive, dusty, hot, cold, humid, and hazardous environments. We are specialized in the manufacture of standardized heating, ventilation, air-conditioning and related products. Our products include roof mount air conditioners, industrial & hazardous duty bottles, water coolers, through-the-wall air conditioners, compressors for refrigeration & air-conditioning in hazardous locations and split unit air conditioners. We offer five basic models of roof-mount harsh-duty air conditioners ranging in cooling capacity from 12,000 BTUH through 36,000 BTUH. Thermostats in our air conditioners can be adjusted to maintain temperatures inside the cooled space as high as 105°F to 110°F. Roof-mount air conditioners include a plenum that passes through the roof/ceiling of the conditioned space. The section of the air conditioner mounted on the roof allows both the top and side access to facilitate maintenance & repair. Our through-the-wall air conditioners can be mounted through a window. We offer optional 316L stainless-steel support brackets for these air conditioners. They have all key components mounted on a slide-in insert so that they can be removed for maintenance and repair & remounted quickly.