Heat-Recovery Systems

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Retrofitting a Heat-Recovery Ventilator

The challenges are finding a good place for the unit and installing the ductwork without butchering interior finishes. More

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Retrofitting a High-Tech Heating System

This design uses a gas boiler and solar thermal collectors as heat inputs, and... More

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Condensing Storage Water Heaters

These heaters are up to 96 percent efficient and typically easier to retrofit than... More

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Products

Windows; energy conservation More

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Efficiency Dos and Don'ts From an Energy Nerd

With high fuel prices here to stay, now is the time to get it right. More

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Solar Hot Water 101

Solar water heating has a proven record of cutting energy costs. Here's what you... More

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Ground-Source Heating & Cooling Gets Better

Direct-exchange heat-pump technology is pushing energy efficiency through the roof... More

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Problem-Solving Tools & Materials

This year's collection of new products can help you work smarter and better. More

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Backfill: Poor Man's HRV

Poor man's HRV More

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A Simple New-House Manual

A builder shares his approach to providing every home buyer with a customized... More

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