All of the cables and aerial feeds were located in underground ducts.

This is due to the large clustering of heat absorbent surfaces that heat up in sunlight and that channel rainwater into underground ducts.

Since the splitting transformers were in underground ducts, they were housed in robust die-cast boxes.

In Provence, a typical village fountain consisted of a pipe or underground duct from a spring at a higher elevation than the fountain.

A. Since 1891, it has built and maintained the underground ducts - once called "subways" - in Manhattan and the Bronx.

Ondol, which means "warm stone," involves the use of stones and underground ducts to help transport warm air from the kitchen to the rooms in the house.

To further maximize the cooling effect, the incoming air may be led through underground ducts before it is allowed to enter the building.

BT has agreed to share access to its telegraph poles and underground ducts and recently cut the cost of renting such equipment.

Air-earth heat pumps circulate the building's air through underground ducts.

Water to the pools were transferred through underground ducts and filtered before flowing to the pool and in a similar fashion the water was emptied.