Home heating and cooling systems are responsible use about 45 percent of the energy.

Two years ago, the building's cooling system abruptly shut down in the middle of summer.

Four of seven heating and cooling systems did not work.

As a simple example, let us take a large pipe break in the primary cooling system.

If you're running low, you can damage your car's cooling system.

But the big problem turned out to be the cooling system, largely to no one's surprise.

That power plant used lake water for the cooling system.

The cooling system seemed to correct itself, but the attitude problems continued.

That meant a special cooling system had to be designed.

I knew then that something must have gone wrong with the cooling system.