Air Space Along Side Of Chimney In Attic

A two room addition on the 1st floor has limited attic space and a 4 crawl space.

Air space along side of chimney in attic.

Make the air move over as long a path as possible. O is air conditioning the 1st floor effective with floor venting if i run ductwork in the basement. Then when they got to the attic they made a small correction to make the chimney exit at the ridge. Opening all the windows at the same time doesn t do much either.

Windows a few feet apart don t do much. Plug all open joist spaces under insulated side walls. Ideally both metal and masonry chimneys should be airsealed for energy conservation purposes air leakage and to stop house moisture getting to the attic with the escaping house air. Long piece from a batt of fiberglass insulation and place it at the bottom of a 13 gallon plastic garbage bag.

Combustible material shall be permitted to abut the masonry chimney walls provided there is a minimum of 12 inches to the inside surface of the flue liner or in the case of a fireplace 12 inches from the inside surface of the firebox. Access the attic through a crawl space in the ceiling using a stepladder or use or the attic stairs. To air seal around combustion flues use fire rated caulk and ul rated collars or sheet metal cut to fit and sealed with fire rated caulk while maintaining proper clearance between flue and combustible materials. With the metal types check with the manufacturer as some are still tested with the loose attic insulation shield firestops and should be left as is.

Measure the four sides of the chimney where it goes through the ceiling framing and add up the. It s easy to see your point about eliminating ductwork from the attic. Heated rooms built into attics often have open cavities in the floor framing under the walls. For exterior chimneys a 1 inch minimum air space must be maintained between the chimney and combustibles.

Try to draw in air from cooler outside areas but note that doing so may not be practical due to prevailing winds. Fold the bag over and stuff it into the joist space under the wall. It was common practice to offset the chimney on one side of a wall say the kitchen for a kitchen wood stove and leave the living room wall flush. However i have two questions if i want to centrally air condition my entire house.