Public Tunnels, Mass Transit, Sewage and Water Treatment


DMC's Cage Code: 4KM75

For an overview of DMC’s harsh-duty air conditioners, Click here.

If you have a specific application in mind, please complete our Project Data Form for Air Conditioners or Filtration. An engineer will then prepare a proposal with our recommended solution.

If you have questions about how hazardous/explosive areas are classified, Click here

For an overview of DMC's low-maintenance and no-maintenance filtration systems, Click here.

All DMC products retain their harsh-duty characteristics when modified for hazardous (“explosion-proof”) environments. Click here

If you have more general questions or comments, please use our Contact DMC Form.


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Proudly made in the USA

Municipalities and other governmental authorities must provide services within many kinds of harsh environments — corrosive, dusty, hot, cold, noisy, and even hazardous (explosive or flammable). If you must cool, heat or ventilate under any or all of these conditions, DMC can help you!

DMC designs and builds air conditioners specifically to handle each of these tough conditions individually — or all together! Standard 316L stainless-steel cabinets, corrosion protection on all evaporators and condensers, and incoloy tubular heating elements resist a huge variety of harsh agents. Its condensers and evaporators do not clog with dust or sand and they cool in ambient temperatures from 131°F (55°C) down to either 32°F (0°C) or -40°C/F as you specify — and without any sensitive or hard-to-find electronic controls.

I. Motor Vehicle Tunnels confine the heat and corrosive exhaust gases of trucks and automobiles. DMC specializes in air conditioners and ventilation systems to resist both. Toll booths and ferry terminals encounter similar problems.

II. Control Rooms for Underground Mass Transit Systems must endure high (and sometimes cold) ambient temperatures and metal dusts while operating sophisticated electronic control equipment. DMC equipment handles extremes of temperature as well as the dust, even if the dust is present in quantities great enough to constitute an explosion hazard.

III. Solid Waste Disposal, Recycling and Water Treatment Facilities constantly confront corrosion and the risk of hazards such as explosive materials or gases in refuse they process. Durable Machinery’s equipment protects against such risks because it is designed to handle many kinds of corrosion, dusts, and explosion and flame hazards.

Since DMC designs its units specifically for durability and operations under extreme conditions, they retain their energy efficiency under such conditions. DMC air conditioners are the “greenest” under harsh conditions.

Reminder about “Explosion-Proofing”: Even when DMC adapts its units for flammable and explosive environments, they retain all their other harsh-duty advantages and durability. Therefore, they afford a far better return on investment than do residential or commercial units modified for hazardous locations. In addition, DMC makes a special priority the development and production of robust Division/Zone 1 air conditioners, with and without heat.

DMC builds industrial air conditioners for public tunnels, mass transit, sewage and water treatment. DMC’s air conditioners are more durable and reliable than light-industrial and commercial-grade units in desert sand, high humidity, extreme heat, cold, hazardous (explosive) and other difficult environments. HVAC for harsh industrial, marine and military conditions, explosion proof air conditioners, severe duty air conditionersHazards Classified by Group