HVAC Systems

BuildingGreen.com has an interactive online calculator to make comparing fuel costs simpleby 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 dietby Dave Yates

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

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

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

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

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

Micro-cogenerators, or combined heat and power (CHP) systems, are both environmentally friendly and a money saverby Lynn Underwood

An innovative solar-heating system is the foundation of an artist’s small country house, where an equally smart plan accommodates both life and workby Charles Miller

Common-sense solutions for creating homes that are self-reliant, resilient, and versatileby David Johnston, Scott Gibson

by Rachel Wagner

College students design and build nearly net-zero energy homesby Charles Bickford

Compact and beautiful, mkLotus is a zero-energy house with major appeal by Tim Schmidt

This add-on to your water heater uses hot air to heat the water in your tankby Chris Ermides

Testing an attainable approach to green practices, an architect designs his own home for a friendly fit in a historic districtby Michael McDonough