B-Vent Storm Collars are essential for Category 1 gas-burning appliances such as furnaces, water heaters (HWT), boilers, pool heaters, unit heaters, gas fireplaces, and infrared tube heaters. These collars are approved for Natural Gas (NG) and Propane (LP), providing a reliable seal to prevent water and debris from entering the vent system. With a maximum temperature rating of 243°C (470°F), they ensure optimal performance and durability in harsh weather conditions, helping to maintain the efficiency and safety of your heating system.