Asthma was not associated with any particular ventilation system in the building.

And we found the optional automatic ventilation system to be somewhat tricky.

The sound of cooled air blowing through the ventilation system seemed amplified.

He said details of ventilation system problems would have to await further investigation.

Meanwhile, a highly efficient ventilation system ensures a constant supply of fresh air.

Other eco measures include solar panels and a heat recovery and ventilation system.

The main drawback was the absence of an adequate ventilation system.

Meanwhile, Warmlite's adjustable chimney-vent ventilation system allows warmth and humidity control.

The ventilation system was totally inadequate and the air turned stale very quickly.

No sound but the ventilation system pumping heated air through a nearby vent.

It was there so the scrivs would have easy access to the ventilation system.

Then there's just the hum of the instruments, the purr of the ventilation system.

One was for elevator machinery, while the other seemed to house a ventilation system.

Chandler listened to the low hum of the ventilation system.

In the meantime the ventilation system automatically cleaned the air.

A well-protected ventilation system tops off the feature list.