Trystate provides HVAC construction and maintenance services in the New York metropolitan area. The company works in the education, healthcare, performing arts, residential, hotel, commercial office, and retail markets. All HVAC piping work is self-performed by the company's team of Local 638A Steamfitters. All HVAC start-up and HVAC maintenance work is self-performed by the company's team of Local 638B Metal Trades Mechanics.