HVAC Systems

Basic vs. full feature by Sean Groom

by Henry Gifford

Heat-recovery ventilators can keep up to 80% of the energy in exhaust air inside a house, saving conditioned air and the money spent to heat or cool it. by Rob Yagid

In a dense urban neighborhood, this remodeled bungalow goes green with recycled materials, solar energy, gray water, and room for the owners’ day jobs by Geoffrey Holton

21st-century technology and a classic look come together in a shingle-style house that produces more energy than it consumes by Bill Heigis, Hobie Guion

A first-time home designer nails it with an updated farmhouse that includes double-duty spaces, a serious mudroom, and a five-star energy rating by Diane Kolak

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

by Bob Romano

Look over the shoulder of an expert installer as he fastens panels to the roof and explains how the system works by Scott Andrews

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

by Charles Peterson

Using factory-assembled pieces and swapping a boiler for a water heater can lower the cost of radiant-floor heating systems by Scott Gibson

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

by Jim Benton