20” x 20” Chim-A-Lator Deluxe Fireplace Damper

(No reviews yet) Write a Review
  • stainless steel mesh sided heavy duty fireplace damper
  • chim-a-lator showing the its key features
  • illustration showing the measurements of the item
$1,094.00 - $1,214.00
Frequently bought together:


Product Specifications:

      • Type: Fireplace Damper
      • Material: Stainless Steel
      • Flue Size: 20” x 20”
      • Width (from-to): 18” - 20.25”
      • Length (from-to): 18” - 20.25”
      • Mesh Size: 3/4” or 5/8”

The Chim-A-Lator Deluxe, which neatly mounts on top of a masonry fireplace chimney, is controlled by a convenient, adjustable regulator installed on the side wall of the fireplace. It is a better replacement for old, broken dampers than conventional cast iron dampers. The top sealing damper with the least problems has been around for over 40 years.

This safeguards the chimney's interior and benefits your fireplace in a number of ways. They serve as a wall separating the interior of your chimney from the outside environment. The duct that allows smoke to leave the structure is located beneath the cap.

It will be possible to maintain the surface of a chimney properly by reducing the amount of dirt and water that enters it. The air vents are still operating as they should, and the cost was significantly lower than if they had to be replaced because of damage.

5” minimum space between flue tiles required (overhang is 2.5”);
Custom size Chim-A-Lator available. Call for pricing
Use Outside Dimension when measuring


  • Fully Assembled Out of the Box - Provides for fast easy installation
  • Integrated Spark Arrestor - Provides for safe fireplace operation
  • Keeps Animals Out of the Chimney - even when damper is open
  • Heavy Duty Frame
    • Made from 18 ga. stainless steel
    • Provides strength and rigidity
  • Threaded Weld Nuts - For easy and secure installation
  • Saves Energy Tight seal on top of chimney, keeps
    heat in when fireplace is not in use
  • Damper opens a full 6.5” - Allows for maximum draft.
  • 6 Setting Regulator - Controls the amount of draft to
    produce more heat when burning.
  • Won’t Freeze Shut in Cold Climates - Heavy duty stainless steel
    springs provide 45lbs. of lift when opening damper.
  • 100% Stainless Steel Construction No rust or corrosion – Lifetime Warranty

PDF Downloads Downloads
BDM Chimney Cap Warranty Card.pdf

View AllClose
Scroll to Top