What Is a Type L Vent

Type L vents are designed for venting approved oil-fired and natural-gas appliances that produce draft hood flue gasses that do not exceed a temperature of 570º F (299º C), or 926º F (299º C) for 10 minutes in an over-fire situation. The minimum clearance from combustible materials is generally 3 inches.

Where are L vents used?

Type L Vents – Double Wall Metal Vents A Type-L vent is used for oil-fired appliances but can also be used for venting natural gas fired appliances.

What is Type C vent?

Type C vents are used only as connectors. They are single walled galvanized pipes, and as such often called “galvanized pipes”. They are used only for venting gas or oil. Using a C vent with solid fuel appliances can cause extremely toxic fumes.