Installing

With common-sense wiring and the right hardware, you can replace an existing light fixture with a breeze in almost any room in the house by Clifford A. Popejoy

Architect Berry Langford explains how an evaporative cooling unit cools a house by adding humidity by Berry Langford

Easy to install, these programmable gizmos can save money and keep you comfortable by Sean Groom

by Charles Peterson

Radiant-panel systems a carpenter can install are perfect under a wood floor by Rick Arnold

Powerful, quiet exhaust fans and their smart switches have made it easy to avoid mold, mildew, and stale air in the bath by Scott Gibson

Under tile, heat mats warm your toes without pipes and a boiler by Tom Meehan

A quiet fan, airtight ductwork, and a leak-free vent combine to clear moisture from the bathroom and the house by Mike Guertin

Careful planning and precise layout keep the smoke out of your eyes by David Getts

by Anthony Zaya

Ground-source heat pumps rely on buried water loops to heat and cool efficiently and economically by William J. Evangelist

Pick a fan that's quiet and powerful, and keep the duct short by Rex Cauldwell

The kind of ducts you use and the number and types of turns they make dramatically affect HVAC-system performance by John O'Connell, Bruce Harley

Concrete slabs, thin slabs and metal plates offer different ways of routing radiant heat underneath every floor in the home by John Siegenthaler