If a library takes E-rate money, it has to install content filters.

It is usually much easier to install filters at each telephone jack that is in use.

Another option is to install ceramic filters into the gating system.

They installed filters to make their water safe for bathing if not for drinking.

The effects of light can be sharply reduced, she said, by installing filters on the windows.

Other American cites considered installing filters but deemed them too expensive at the time.

"She must have installed filters to block any communication from your ship."

We know that installing filters increases the output of CO2.

The plant has installed filters to screen out any odours.

The ruling did not affect the portion of the law requiring schools to install filters.