Dierks Heating Company, Inc. (DHC) has been family owned and operated since 1917. We are a New York City and New York State Certified Woman's Business Enterprise (WBE) and are signatory with Steamfitters Local 638 and Teamsters Local 1205. We are WBE certified with The Port Authority (PANYNJ), Dormitory Authority (DASNY), and the School Construction Authority (NYCSCA). We are members of the Mechanical Contractors Association of America (MCAA), Mechanical Contractors Association of New York (MCA), the Greater New York Welding Chapter Bureau (GNYWCB) and Subcontractors Trade Association (STA) where we are active participants and serve on various committees and/or boards.