Downdraft Problems Chimneys

The air pressure in the lower zones can be lower than atmospheric pressure and if the fireplace is located in one of these zones the chimney may have a permanent downdraft.

Downdraft problems chimneys.

Unplug the communication cable from the downdraft control. The size of the liner can be checked by measuring the size of the flue at the top of the chimney. Wind can enter short chimneys more easily than tall chimneys. Windows doors above the neutral pressure plane.

Another possible cause of downdraft is an improperly sized flue liner. A window fills a hole in a wall that leads to the outdoors the potential for air leaks. We have all the right chimney services to identify and resolve current issues while preventing future chimney downdraft problems. Many different issues including negative pressure could be causing your chimney downdraft problem.

Unbeknownst to many homeowners chimney height plays a role in fireplace downdrafts. Check these possibilities before going to the extent of making an h top. The bluestone caps you placed over each chimney could also be the culprit here. The h top is the only cowl which may reduce the effects of true downdraft.

Increasing the height of the upper part often solves the problem as the tall chimneys have better air currents that low. Make sure nothing is prohibiting path of downdraft chimney. Turn the home circuit breaker to the unit off for 10 seconds then back on again then retest the unit operation. Solving chimney draft problems a.

Plug the communication cable back into the control and downdraft. Even minor accumulations increase. Clean the chimney a heavy accumulation of creosote in a chimney can block the flue or drastically restrict its effective size. If your chimney is just a few inches tall when measured from the surface of your home s roof to the very top of the chimney it may create a downdraft.

A chimney downdraft can also cause smoke to spill into the room during windy days. But remember that true downdraft is rare and providing that the manufacturers chimney specifications are followed in most cases negative pressure is caused by other factors. You should be able to. Also nearby buildings may interfere with the airflow in the vicinity of the fire.