Other equipment which may be optioned in the recirculation system include pool water heaters.

Only in action status did an armored door slide shut, the computer going over to an independent refrigerated recirculation system.

The royal enclosures had the most sophisticated water distribution and recirculation systems.

The men toyed with the idea of using a recirculation system, to pump water back to the top of the garden after it had trickled down.

The recirculation system saves fuel and money.

Study, research and development in this area ranges from low intensity man-made pond systems to highly intensive recirculation systems involving natural lakes.

The recirculation system enables the planes to use less fuel to cool the outside air, which is heated by the engines as it is drawn in.

This water can be recaptured by a recirculation system and pumped back into the lake.

Fortunately, they had plenty of air, and their recirculation system worked to perfection.

The scientists are examining the rate at which disease spreads among plants within recirculation systems in glasshouses.