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Drafty House & Fireplace Cold Draft Entry Solutions

Also known as down drafts. Fireplace cold drafts may be attributed to amultitude of different things. Most fireplace cold drafts are due to internal negative pressures, which are likely induced by other forced air systems & other exhausts in your home. Other fireplace cold draft factors may include exterior barometric pressures, stack location on your home (inside or outside), a whole house chimney (stack) effect, dynamic wind loading, or wind downdrafts.

A true understanding of fireplaces requires extensive knowledge of airflow patterns, pressure differentials, and actual fireplace construction techniques. A SuperiorChimney CSIA (Chimney Safety Institute of America) Certified Chimney Sweep can assess your chimney and its termination environment to pin point the cause(s) of your fireplace cold draft and prescribe the resolution.

Heated air has lower density than cold air, so the warm buoyant air in your house wants to rise through the roof, while the cold heavy air in your unusedfireplace chimney wants to flow downward causing a drafty house. If there are pathways in the upper stories or roof to allow the rising warm room air to escape, that warm air will flow up and leak out of your house and replacement air will flow down the chimney and in through your fireplace (fireplace cold drafts). The stack effect is more pronounced in taller, leakier houses and in houses with cold draft chimneys(like chimneys on outside walls, exposed to outdoor temperatures for their entire height & length).

Rainy weather also accelerates the stack effect causing fireplace cold drafts, because the wet air entering the chimney is heavier than the dry air in the house.

Live comfortably, not in a drafty house

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Lombard, IL 60148
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