All Gas Regulators is your online source for thousands of Reznor products. With over 125 years of experience in gas heating and air conditioning, Reznor (Nortek Global HVAC) manufactures a wide range of industrial and commercial HVAC products for gas fired unit heaters, air handlers, and rooftop units. Whether you need light commercial heating & cooling parts, or residential packaged HVAC applications, new and genuine Reznor replacement parts are available to ship direct to your door.