A top damper or cap damper is a metal spring door placed at the top of the chimney with a long metal chain that allows one to open and close the damper from the fire place.
alluminium
A furnace or fireplace or the ash dump box.
A damper is usually a piece of metal that is installed in a duct to allow the airflow to be restricted. This lets the user open or close the restriction to adjust the amount of air getting through. There is often a metal tab handle outside the duct to rotate the damper inside the duct. The handle is parallel to the restriction plate, so the least resistance is when the handle is parallel to the duct itself. To restrict the airflow, turn the handle so that it is up to 90 degrees off from the direction of the duct.
Snubber is Pulsation damper that is installed on suction and discharge of compressors. It provides a continuous stream on reciprocating compressors.
The flow of flue gases in chimney due to difference in pressure i.e cold atmospheric air outside and hot gases in chmney is called as boiler draught.
One can purchase a chimney damper from a variety of stores. Chimney dampers can be purchased from fireplace specialists such as Woodland Direct, or from online stores such as Amazon.
form_title= Chimney Cap form_header= Install a chimney cap easily. How old is your chimney cap?*= _ [50] What color are the vents?*= _ [50] Do you need someone to clean the chimney?*= () Yes () No
fireplace
Put on a pair of safety glasses or goggles (you ARE going to get stuff in your face) get a good flashlight, and get a look at the damper. Most are hinged, and will swing UP the chimney. Most have a bracket and support the holds it open or closed. With the light to help you see, move the support so that it is free of the bracket, and try to swing it open (up). If it does not move, you may have foreign material in the chimney (especially if your chimney does not have a cap). If that is the case, you need the services of a chimney sweep.
FIREPLACE
The flue is the actual pipe or chimney where the damper is the mechanism that opens and closes the flue
The chimney cap
Your chimney damper is open
A chimney cap can cost anywhere from as little as 50 dollars, to as expensive as 200 dollars. It really depends on the brand of chimney cap being bought.
By flue, I believe you mean the damper in the chimney, which has the effect of closing off the flue. Close the damper any time you are not using the fireplace. Remember -heat rises -so heated air will also rise up and out the flue in the winter. In the summer it is also good to keep the flue closed because heat and humidity will activate the smelly properties of the ash and creosote in the firepalce chimney and create a bad odor in the home. In order for a damper to do its job it must seal tightly/ If your existing mechanical damper is broken, missing or in a bad state you can repair it or replace it with a chimney top damper or a chimney balloon. But, open the damper before lighting a a fire, or it will rapidly get quite smokey in the house.
Most dampers are designed to close DOWN, and are kept closed by the weight of the damper. Get a pair of safety glasses and a flashlight, check for foreign material or mortar that may be keeping the damper from seating, and that the metal of the damper plate is not warped.
In the event of fire, the fusible link melts and the shutter gets closed. This helps in blocking the fire from spreading through the duct ----- If you are asking about a damper on a stove or chimney, that is not called a fire damper, but just a damper. There is a link to a question on that below.