An HVAC Oxygen Tank (New) is a high-pressure gas cylinder designed to store and supply oxygen (O₂) for use in HVAC service operations, particularly in brazing, welding, cutting, and other processes that require an oxygen-acetylene or oxygen-propane flame.

These tanks are typically steel or aluminum cylinders containing compressed oxygen gas under pressures up to 2,200 psi. They are not used for air supply or ventilation — they serve technical/maintenance roles in HVAC systems.