ventilation

They also usually have their own special natural ventilation system.

The ventilation system was the same, too similar to be a matter of chance.

"Has the ventilation system been started up in number one?"

But ventilation is not the only thing to consider here.

The problem, it seems, was a fire in the ventilation system.

"We were trying to get some ventilation in here. "

Until then, he had to leave his windows open for ventilation.

These doors are an important part of the ventilation system.

You may try to improve the ventilation in your work area.

The risk will be further increased if ventilation is poor.

In the summer the doors were left open for ventilation.

Turning off the ventilation systems when the school is not in use, he said.

And now she also understood why the ventilation system was no longer working.

But you see, they have all these holes for ventilation.

The windows were still open, but there was no ventilation.

Effects of wind on the ventilation system in a building.

Government officials said its ventilation system was not connected to the rest of the building.

Many of the classrooms in the school have ventilation problems.

He has been working on liquid ventilation for almost 30 years.

There are two other areas of your home that also need effective ventilation.

We've been trying to learn his route through the ventilation system.

I turned on the power so we could lower the windows for some ventilation.

Almost all you hear is the rush of air in the ventilation system.

As yet the ventilation system had been unable to clear it.

There was no ventilation and the door refused to stay open.