Geothermal Systems

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Focus on Energy: Ventilating Heat Pumps

Ventilating heat pumps More

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Focus on Energy: Ventilation Secrets from Sweden

Ventilation Swedish style More

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Shopping for Setback Thermostats

An energy specialist tells what features to look for when selecting a setback thermostat. More

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Focus on Energy: Ductless HVAC Simplifies Installation
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Working the Bugs Out of High-Efficiency HVAC

Early users of high-performance HVAC faced many disappointments. The latest generation of equipment works well — as long as it’s installed correctly. More

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Focus on Energy: Combination Space and Water Heaters
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Tapping the Earth for Cheap Heat

The stable temperature of the earth makes ground-coupled heat pumps a viable choice for cold climates. Here’s a look at cost-effective approaches. More

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What's the Best Heating System?

A veteran heating-system designer offers some pointers based on his experience in the field. More

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About the House: Heating Systems, Part II

Electric, solar and solid-fuel heating systems More

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The Swedish Solution

Housing consultant Richard Karg takes a close look at the latest in ventilation technology: the Swedish exhaust-air heat pump. How does this system work, what are the pros and cons, and how much will it cost? More

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