Z-Vent Concentric Vent Kit w/ 3" Fresh Air Intake and 4" Exhaust
Brand: Z-Flex
Part#: 2SVSHTC43S
4" Concentric Vent Kit is manufactured from Category III stainless steel and is a must-have for all direct vent, sealed combustion (intake air from outdoors) Takagi tankless water heater installations.

If the unit is vented through the same wall it is installed on (typically, right above it) and the installation requires that the fresh air supply for the tankless water heater to be from outdoors, this kit is a convenient, cost-effective and easy-to-install solution.

This concentric vent kit is designed for 5-10" thick walls.

Features:
  • The flue connection on the concentric vent kit is pointing downwards, allowing for a straight pipe run (with no elbows) to the flue outlet of the gas tankless water heater or a high-efficiency boiler
  • The intake connection on the concentric vent kit is pointing to the side and can be rotated to point either to the left or right side to accommodate the installation (picture shows intake pointing to the right)
  • Telescopic design with adjustable wall thimble allows for installation through frame or masonry walls
  • Concentric vent kit requires a single hole, making installation faster and minimizing wall intrusion
  • Made in USA

Technical Specifications:
  • Flue Size: 4" (nominal size and actual OD) - compatible with 4" Z-Vent & NovaVent
  • Air Intake Size: 3" (nominal size and actual OD)
  • Wall Thickness: Adjustable, 10" max. (no minimum)
  • Min. Wall Opening: 6.5" dia. Hole
  • Thimble Size: 14" x 14"
  • Max. Temperature: 480°F (249°C)
  • Material: AL29-4C
  • Hex Nut Size: 5/16"
  • Certifications/Standards: UL listed for USA and Canada, meets UL 1738
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