This week the commercial heating and air conditioning manufacturer Trane, based in Piscataway, N.

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Nolin brought in energy engineers from Trane , the big subsidiary of publicly traded American Standard.

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Ingersoll, maker of Trane air conditioners and Club Car golf carts, saw lower costs and interests expenses.

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It works like this: Trane bored holes up to 500 feet underground and installed dozens of loops of pipe.

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Jazz aficionados would do well to make their way to Charlottenburg, where the A-Trane offers top-quality live music in an atmospheric setting.

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" They may admire John Coltrane's innovative compositions but, he added, "Trane gave them their freedom to do different things and I don't know that that was Trane's intention.

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With power prices on the rise in recent years, Trane, along with competitors like Honeywell and Siemens, have seen a rush of new business auditing and overhauling energy systems for corporate and government clients.

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At current electricity prices, an investment in a geothermal heat pump system can be paid off in less than eight years, says Trane, which like other energy service providers has seen a big uptick in interest for geothermal systems in recent years, from the military, schools, corporations and even residential customers.

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