HVAC Systems

Here’s how to spot the signs and boost the efficiency of your furnace, boiler, or heat pump by Dave Yates

This home uses five systems to reduce its environmental impact, lower its operating cost, and improve its connection to the land by James Tuer

Inspecting a house for inefficiencies is the first step toward optimized comfort and minimized utility costs by Jefferson Kolle

BuildingGreen.com has an interactive online calculator to make comparing fuel costs simple by Chris Ermides

A forward-thinking homeowner invests in a highly efficient HVAC system that includes photovoltaics and a noncombustion furnace

Requirements: 1 metal roof, 2500 gallons of rain, and the desire to save the planet

Get an in-depth look at a near-zero energy house featuring recycled materials and solar-heating and rainwater-harvesting systems

Video tours and takeaways from Portland's Build It Green! 2008 event

From wrapping your tank to tapping the sun: Six ways to put your water heater on an energy diet by Dave Yates

Blower-door tests improve efficiency and lower energy costs by finding where heated air escapes by John Jennings

Before you assume that basement monster must go, watch this cost-benefit analysis from a professional home-energy auditor by John Jennings

Solar panels aside, you can’t see the upgrades that make this downtown remodel so energy efficient by Richard Renner

By installing a modern wood-heat appliance, you can save money this winter and reduce your environmental impact by Matthew Teague

HERS Index allows more latitude for recognizing reductions in energy consumption by Tristan Korthals Altes