This type of heating offers quiet operation and relatively little heat loss through the distribution system.

Their small size and quiet operation make it possible to fly them in residential areas.

If quiet operation is important, check the amount of noise the keys make.

They are widely known for their very quiet operation, even compared to much newer models.

The main advantage of these vehicles is their clean, quiet operation.

Designed with guest comfort in mind - providing reliable, quiet operation for years to come.

'This will have to be a very quiet operation,' whispered Bruce.

None of them was designed for quiet operation inside.

We'd prefer a nice quiet operation, and so would you.

Any machine you select should offer a comfortable stride and smooth, quiet operation.