#Fireplace draft control install

#Fireplace draft control install

If your chimney is too big, install a masonry or stainless steel flue liner that has the same CSA as the vent opening on the appliance.Д¬himneys draw a small amount of air, even when there is no fire below: this phenomenon is called ambient updraft. If your chimney is too small, replace either the chimney or the appliance. For this reason, both flue undersizing and flue oversizing should be avoided. If it is too big, it may draw too slowly for the appliance, and may never heat up enough to compensate. If the chimney is too small, it may not have room for the volume of rising air the stove requires. In order for a woodstove chimney to do the best possible venting job, the flue opening must have exactly the same cross-sectional area as the vent opening on the appliance. Proper woodstove flue sizing is determined by the stove Manufacturer for each model during the testing process. If your fireplace smokes because the flue is too small, try temporarily reducing the size of the fireplace opening with pieces of sheet metal if this works, use masonry materials or heavy steel to accomplish a permanent solution. Masons have for many years sized fireplace flues using a вЂњrule of thumbвЂќ that the CSA (Cross-Sectional Area) of the masonry flue be at least 1/10 the CSA of the fireplace opening.ДЇor example, an 8Г—12 (id) flue liner is used in a chimney venting a fireplace with an opening measuring up to 40вЂі wide x 24вЂі tall: larger fireplaces require larger liners. Masonry fireplace flue sizing is determined by the size of the fireplace opening below.