OPTION 1 Menu Warm Air Furnace > Mid Efficiency, Natural Gas / Propane >> Stand-Alone Chimney or Masonry Relining Installation Type B Gas Vent DuraFlex® Aluminum DuraFlex® Stainless Steel DuraLiner® > High Efficiency, Natural Gas / Propane >> Stand-Alone Chimney Installation DuraSeal® FasNSeal® Polypropylene Common Vented Appliances > Mid Efficiency, Natural Gas / Propane, Stand-Alone Installation Type B Gas Vent Oil Furnace / Boiler > Mid Effeciency, Oil >> Stand-Alone Installation Canada Only Non-Canada >> Masonry Relining Installation DuraFlex® Stainless Steel DuraLiner® Tanked Water Heater > Mid Efficiency, Natural Gas / Propane, Stand-Alone Installation DuraFlex® Aluminum DuraFlex® Stainless Steel DuraSeal® FasNSeal® Polypropylene Type B Gas Vent > Mid Efficiency, Natural Gas / Propane, Masonry Relining Installation DuraFlex® Aluminum DuraFlex® Stainless Steel DuraSeal® FasNSeal® Polypropylene Type B Gas Vent > High Efficiency, Natural Gas / Propane, Stand-Alone Installation DuraFlex® Aluminum DuraFlex® Stainless Steel DuraSeal® FasNSeal® Polypropylene Type B Gas Vent Tankless Water Heater > High Efficiency, Natural Gas / Propane, Stand-Alone Installation DuraSeal® FasNSeal® Polypropylene Residential Boiler > Mid Efficiency, Natural Gas / Propane, Masonry Relining or Stand-Alone Installation DuraFlex® Aluminum DuraFlex® Stainless Steel DuraLiner® DuraSeal® Type B Gas Vent > High Efficiency, Natural Gas / Propane, Masonry Relining or Stand-Alone Installation FasNSeal® FasNSeal® Flex Polypropylene Commercial Boiler > High Efficiency, Natural Gas, Stand-Alone Installation DuraSeal® FasNSeal® FasNSeal® Flex FasNSeal® W2 Polypropylene > Mid Efficiency, Natural Gas, Stand-Alone Installation DuraStack® DuraStack® Pro Type B Gas Vent Generator Engine Exhaust > Natural Gas / Gasoline / Diesel Stand-Alone Installation DuraStack® Pro Commercial Kitchen Exhaust > Natural Gas, Stand-Alone Installation DuraStack® Pro Residential or Commercial Pizza Ovens > Wood, Stand-Alone Installation DuraStack® Pro DuraStack® Factory Built Fireplaces > Wood, Stand-Alone Installation >> USA Only >> Canada Only > Natural Gas / Propane Stand-Alone Installation CVS® Type B Gas Vent Freestanding Stove > Wood, Stand-Alone Installation >> USA Only >> Canada Only >> Anywhere DVL® > Natural Gas / Propane, Stand-Alone Installation > Wood Pellets / Biofuel, Stand-Alone Installation PelletVent® Pro Freestanding Stove (connected to mansonry chimney) > Wood, Connecting to a Masonry Chimney Installation DuraTech® 5″-8″ DVL® > Wood, Masonry Relining Installation DuraFlex® Stainless Steel Masonry Fireplace Insert > Wood, Masonry Relining Installation DuraLiner® DuraFlex® Stainless Steel > Natural Gas / Propane, Masonry Relining Installation > Wood Pellets / Biofuel, Masonry Relining Installation DuraFlex® Stainless Steel PelletVent® Pro OPTION 2 Menu Warm Air Furnace > Mid Efficiency, Natural Gas / Propane >> Stand-Alone Chimney or Masonry Relining Installation Type B Gas Vent DuraFlex® Aluminum DuraFlex® Stainless Steel DuraLiner® > High Efficiency, Natural Gas / Propane >> Stand-Alone Chimney Installation DuraSeal® FasNSeal® Polypropylene Common Vented Appliances > Mid Efficiency, Natural Gas / Propane, Stand-Alone Installation Type B Gas Vent Oil Furnace / Boiler > Mid Effeciency, Oil >> Stand-Alone Installation Canada Only Non-Canada >> Masonry Relining Installation DuraFlex® Stainless Steel DuraLiner® Tanked Water Heater > Mid Efficiency, Natural Gas / Propane, Stand-Alone Installation DuraFlex® Aluminum DuraFlex® Stainless Steel DuraSeal® FasNSeal® Polypropylene Type B Gas Vent > Mid Efficiency, Natural Gas / Propane, Masonry Relining Installation DuraFlex® Aluminum DuraFlex® Stainless Steel DuraSeal® FasNSeal® Polypropylene Type B Gas Vent > High Efficiency, Natural Gas / Propane, Stand-Alone Installation DuraFlex® Aluminum DuraFlex® Stainless Steel DuraSeal® FasNSeal® Polypropylene Type B Gas Vent Tankless Water Heater > High Efficiency, Natural Gas / Propane, Stand-Alone Installation DuraSeal® FasNSeal® Polypropylene Residential Boiler > Mid Efficiency, Natural Gas / Propane, Masonry Relining or Stand-Alone Installation DuraFlex® Aluminum DuraFlex® Stainless Steel DuraLiner® DuraSeal® Type B Gas Vent > High Efficiency, Natural Gas / Propane, Masonry Relining or Stand-Alone Installation FasNSeal® FasNSeal® Flex Polypropylene Commercial Boiler > High Efficiency, Natural Gas, Stand-Alone Installation DuraSeal® FasNSeal® FasNSeal® Flex FasNSeal® W2 Polypropylene > Mid Efficiency, Natural Gas, Stand-Alone Installation DuraStack® DuraStack® Pro Type B Gas Vent Generator Engine Exhaust > Natural Gas / Gasoline / Diesel Stand-Alone Installation DuraStack® Pro Commercial Kitchen Exhaust > Natural Gas, Stand-Alone Installation DuraStack® Pro Residential or Commercial Pizza Ovens > Wood, Stand-Alone Installation DuraStack® Pro DuraStack® Factory Built Fireplaces > Wood, Stand-Alone Installation >> USA Only >> Canada Only > Natural Gas / Propane Stand-Alone Installation CVS® Type B Gas Vent Freestanding Stove > Wood, Stand-Alone Installation >> USA Only >> Canada Only >> Anywhere DVL® > Natural Gas / Propane, Stand-Alone Installation > Wood Pellets / Biofuel, Stand-Alone Installation PelletVent® Pro Freestanding Stove (connected to mansonry chimney) > Wood, Connecting to a Masonry Chimney Installation DuraTech® 5″-8″ DVL® > Wood, Masonry Relining Installation DuraFlex® Stainless Steel Masonry Fireplace Insert > Wood, Masonry Relining Installation DuraLiner® DuraFlex® Stainless Steel > Natural Gas / Propane, Masonry Relining Installation > Wood Pellets / Biofuel, Masonry Relining Installation DuraFlex® Stainless Steel PelletVent® Pro Product Applications