If you have the fireplace smell in your home like rob does finding the source of the negative pressure and reducing it should solve the problem.
Attic fan fireplace smell.
When you turn on both fans this will pull out the smoky air while you are drawing in new fresh air.
Whatever the situation is you are still left with a smoke filled room.
A neighboring structure s height increase.
New windows and or doors.
The smell or smoke coming down the chimney is a result of your house loosing too much air from the unsealed attic.
You don t want to stop using bath fans range hoods and clothes dryers though so keeping the damper closed when the fireplace isn t being used should help.
Attic and or whole house fans always bring fireplace odor in when used.
This can happen when a dryer or other exhaust fan runs or if there are leaks in heating and air conditioning.
Some causes of pressure change a fireplace smell in your home.
How to stop fireplace smells from stinking up the place during summer correction.
A change in your roofing ventilation attic fans.
Every cubic foot of air that passes into the attic is one more cubic foot of air to heat and one less for your chimney.
Now place another fan in a window on the opposite side of the home.
Stove range exhaust fans.
New furnace boiler and or water heater.