Steel Information

National Chimney Supply offers a variety of chimney materials for your lining and relining needs.

Please use the following information as a guide in determining what type of steel to use for relining different types of appliances.

M-FLEX 316L

 Can be used to vent solid fuels, oil and Category I gas burning appliances with efficiencies of 83% or lower

M-FLEX AL294C

 Can be used to vent Category I liquid fuel bringing appliances with efficiencies of 84% or higher

M-FLEX DB ALUMINUM

 Can be used to vent Category I gas appliances with efficiencies of 83% or lower

PREMIER FLEX 304

 Can be used to vent wood and wood pellet burning appliances

PREMIER FLEX 316

 Can be used to vent solid fuels and oil in Category I gas burning appliances with efficiencies of 83% or lower

PREMIER FLEX AL294C

 Can be used to vent Category I liquid fuel burning appliances with efficiencies of 84% or higher