You must pass two qualifying exams in orthodontic assisting and infection control to become a Certified Orthodontic Assistant. As of April 2011, DANB certification for OAs was recognized in 38 states and required in four - Massachusetts, Maryland, New Jersey and Oregon.
American Standard Companies, Inc. was a global manufacturer of plumbing, heating, ventilating and air conditioning (HVAC) systems and services, bath and kitchen products and vehicle control systems.he company was formed in 1929 through the merger of the American Radiator Company and Standard Sanitary Manufacturing Company forming the American Radiator and Standard Sanitary Corporation. The group was renamed to the American Standard Corporation in 1967.
Plus, Trane air handlers make a significant contribution to the overall efficiency of your system. Thatâs because the more efficient your air handler is, the less work your outdoor unit has to do to make your home comfortable.hen matched with a heat pump, it circulates both cool and hot air, depending on the season. With properly sized Trane air handlers, your family has the right amount of clean, comfortable air all year round.