In the basement the same problem can occur.
Attic fan fireplace smell.
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.
When you turn on both fans this will pull out the smoky air while you are drawing in new fresh air.
This can happen when a dryer or other exhaust fan runs or if there are leaks in heating and air conditioning.
An attic hatch recessed can lights bathroom exhaust fans without baffle unsealed windows and air conditioning ducts coming out of ceiling are typical causes of the smelly problem.
A change in your roofing ventilation attic fans.
A neighboring structure s height increase.
Now place another fan in a window on the opposite side of the home.
Stove range exhaust fans.
How to stop fireplace smells from stinking up the place during summer correction.
New windows and or doors.
New furnace boiler and or water heater.
Whatever the situation is you are still left with a smoke filled room.
The smell or smoke coming down the chimney is a result of your house loosing too much air from the unsealed attic.
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 and or whole house fans always bring fireplace odor in when used.