Direct Vent Kit Installation Instructions All of the components, stainless steel or aluminum liners are manufactured at one or more of the following National Chimney locations:. Thank you for purchasing a Rinnai Direct Vent Furnace. For proper operation and safety, it is important to follow the instructions and adhere to all safety precautions.
BDM Direct Vent systems are for use with direct vent gas fired appliances. Read through all venting and appliance instructions before beginning your installation.. Applications DirectVent® Pro is a unitized, coaxial (concentric) venting system designed for use with direct vent gas or propane stoves, heaters, and fireplaces. Materials and Construction .020″ aluminum inner wall. .018″ galvanized steel outer wall. Painted outer walls made of laser-welded .018″ galvalume steel. Caps also available in stainless steel and copper. Outer pipe brings.