Every spring, chimney swallows return to the old mill to raise their chicks among the soot and rafters.

The mason replaced the cracked chimney can with a new clay one.

The old factory's chimney stalk rose above the rooftops like a needle against the sky.

A chimney swallow built its mud nest under the eaves of the old farmhouse.

The architect studied the chimney effects in the atrium to optimize natural ventilation.

Engineers studied the chimney effect to improve ventilation in high-rise buildings.

The old chimney sweeper waved as he climbed down from the roof, his face smudged with soot.

We installed chimney balloons last autumn to reduce heat loss and drafts in the living room.

We installed a chimney balloon to stop the cold draught coming down the flue during the summer.

At the edge of the rooftop garden, a solitary chimney campanula swayed in the late afternoon breeze.