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Round-to-Rectangular HVAC Transition Collar with Built-In Damper - $25 (Marina del Rey)
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High-efficiency round-to-rectangular duct takeoff with heavy-duty built-in damper.
Likely came with our Thermador over-the-stove range hood (600 CFM), but could work with many HVAC setups requiring a secure, air-tight connection from round ducting to rectangular boots.
• Round end: 10” diameter
• Boot size: approx. 10” x 7.5” (rectangular)
• Built-in damper for efficient air control
• Galvanized steel construction
• In excellent condition — never installed
• Ideal for ventilation, range hoods, or HVAC custom work
Great part if you’re replacing a worn connection or building a custom ventilation system.
Leftover from our kitchen remodel. This round-to-rectangular HVAC transition collar came with our Thermador 600+ CFM range hood but was never installed.
• Galvanized steel
• Round inlet to rectangular outlet — ideal for connecting round range hood vents to rectangular wall/ceiling ducts
• Includes heavy-duty backdraft damper to help maintain airflow and reduce energy loss
• Designed for high-performance kitchen ventilation systems or inline exhaust setups
• Compatible with many Thermador, Bosch, and high-CFM hood installations
Condition: Like new, never installed. No dents or damage.
Perfect for remodels, range hood upgrades, or pro-style kitchens using rigid ductwork.