B-Vent Rain Caps are designed for use with Category 1 gas-burning appliances such as furnaces, water heaters (HWT), boilers, pool heaters, unit heaters, gas fireplaces, and infrared tube heaters. These rain caps are approved for Natural Gas (NG) and Propane (LP), providing reliable protection for your venting system. With a maximum temperature rating of 243°C (470°F), they help shield vents from rain and debris, ensuring efficient and safe operation in various heating systems.