4" X 25" Insulated Flex Pipe For Fresh Air AC01359 Shells maximizing biological filtration in the

maximizing biological filtration in the filter

Its Non-catalytic combustion technology and 8-hour maximum burn time make it a reliable and long-lasting choice for your home

and condensation while ensuring a safe and efficient transfer of heat

With six integrated hand holes

4" X 25" Insulated Flex Pipe For Fresh Air AC01359 Shells maximizing biological filtration in theDurable 25 foot insulated flex pipe with fiberglass insulation optimizes wood burning efficiency by delivering fresh outside air to your appliance. The generous length ensures flexible installation options for your intake system. Features: 25 foot length 4 inch diameter Fiberglass insulation Designed for use with Osburn fresh air intake kits