Downdraft Problems Chimneys

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.

Downdraft problems chimneys.

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. Even minor accumulations increase. A chimney downdraft can also cause smoke to spill into the room during windy days. Many different issues including negative pressure could be causing your chimney downdraft problem.

Clean the chimney a heavy accumulation of creosote in a chimney can block the flue or drastically restrict its effective size. The caps might create swirling air currents that can result in a downdraft. Check these possibilities before going to the extent of making an h top. Increasing the height of the upper part often solves the problem as the tall chimneys have better air currents that low.

You should be able to. 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. 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.

Downdrafting occurs when wind blows down the chimney and into your home causing it to feel breezy and cold or hot depending on the season. The bluestone caps you placed over each chimney could also be the culprit here. Windows doors above the neutral pressure plane. A large tree near the unit for example can cause poor air circulation resulting in the downdraft in the chimney.

We have all the right chimney services to identify and resolve current issues while preventing future chimney downdraft problems. The h top is the only cowl which may reduce the effects of true downdraft. Turn the home circuit breaker to the unit off for 10 seconds then back on again then retest the unit operation. Plug the communication cable back into the control and downdraft.

Wind can enter short chimneys more easily than tall chimneys. Solving chimney draft problems a. A window fills a hole in a wall that leads to the outdoors the potential for air leaks. Also nearby buildings may interfere with the airflow in the vicinity of the fire.