The Nitro Fuzer Welding System combines hot air and nitrogen welding for maximum versatility. It incorporates several upgrades, including fine‐flow control regulators on both air and nitrogen sides that are combined with output pressure gauges and a flow gauge to give users the ultimate control over how much gas is used in the welding process. It also has a pressure safety circuit to help prevent burned-out heating elements, an electrically actuated air-nitrogen switch, and a melt-proof silicone and fiberglass braided hot air welder hose. It also features an integrated airless welding system to allow for smoothing out the nitrogen weld and for repairing thermoset polyurethane. Finally, a compact, easy-to-handle welding torch gets into tight spots with no user fatigue.