But the energy consumed is much less than the energy delivered into the ductwork.

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Bridge operator's Forth Estuary Transport Authority (Feta) maintenance workers have installed several miles of ductwork to accommodate electrical wiring.

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Many homeowners will have to rearrange ductwork and interior walls to fit the high-SEER units, which can be twice as large as the ones they replace.

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With a few mouse clicks, the co-worker sent a signal over the Internet that remotely shut off the power to a single fan inside a 10-foot section of ductwork directly above the microphone.

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"I like buildings under construction better than when they are finished because there's a kind of immediacy, a feeling of process, and it's accessible, " he continues, glancing up at his studio's exposed ductwork and hanging insulation.

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