2006 New York Code - General.

 
    §  27-879 General. (a) Vent systems of gas-fired equipment shall be so
  designed and constructed  as  to  completely  exhaust  the  products  of
  combustion to the outdoor air.
    (b)  When  required  by the commissioner, gas vents shall be tested to
  determine fire safety and the adequate exhausting  of  the  products  of
  combustion.
    (c)  Vents  shall  be  installed  if  required, in accordance with the
  applicable standards for gas-fired equipment. See reference standard  RS
  15-2 for a tabulation of these standards.