Is it more efficient to heat all rooms in a house or just those normally used?

— Dan Boivin Beverly Hills, CA

Answered by Jason Kliwinski on November 28, 2011

Which is better attic insulation -- ridge vents or turbines?

— Maurice Jaynes Plano, TX

Answered by Harold Remlinger, AIA, LEED AP, NCARB on November 28, 2011

Should the attic be vented or unvented in a new home with spray foam?

— Jevon Warner Robins, GA

Answered by Ted Kidd on November 21, 2011