FireRock 36" Cast Iron Damper protection-plan Starts automatically when surface temperature

Starts automatically when surface temperature of stove reaches around 149 F

What causes this and how can it be controlled

Diameter 8" Material 316L Stainless Steel

this heater comes with a wall or ceiling mounting bracket

BTU 12500 Finish RAL 6012 49/51540 Powder Coat Connector Size 8" Width 34" Overall Height 68" To Center Line Weight 165 lbs

FireRock 36" Cast Iron Damper protection-plan Starts automatically when surface temperatureMade to seal chimneys when fires are out so the cold air doesnt come in, this important element of a high functioning fireplace comes in three different types: cast iron, top seal, and anchor plate with damper. Important to note about our dampers is: Cast Iron Dampers can be used for all fireboxes with the exception of our 72 conventional, which requires two top seal dampers; and our See Through models, regardless if using masonry or metal flue. Top