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ASCA Steel Chimney Adapter

The ASCA Steel Chimney Adapter is used to provide support for the installation of an RS or RSHT chimney fan on a round, air-cooled steel chimney. It is mounted at the chimney termination point. 

The adapter consists of a square mounting plate to support the fan, and a round collar that can slide into the chimney for a tight fit. The outer diameter of the collar is 1/8" smaller than the inner diameter of the chimney. The 5" collar eliminates the need to secure the adapter externally.


  • Can be used on most round chimneys
  • Integrated support allows venting of inner walls
  • Easy to install without use of tools


Standard Sizes 4" to 13" (150mm to 325mm)
Material Stainless Steel 316L
Collar Size 1/8" (3 mm) less than the chimney ID
Warranty 2-year Factory Warranty
ASCA Steel Chimney Adapter—provides support for the installation of an RS or RSHT chimney fan on a round air-cooled steel chimney
RSHT Chimney Fan—high-temperature exhaust fan used in venting solid-fuel fireplaces, BBQs, pizza ovens and stoves
Chimney Fan - HT

This chimney fan is the guaranteed cure for smoke escaping your wood-fired fireplace, or wood, pellet or coal appliances.

RS Chimney Fan—disperses the smoke sideways (horizontally) just like a standard chimney cap
Chimney Fan

Makes it easy to control your gas-fired fireplace and adds safety features, while being whisper-quiet.