Q: In a heating climate (central New York), I would like to know how to determine whether adding more insulation results in diminishing returns in terms of energy savings. Is there any reason to include more than R-50 insulation in an attic, assuming the
Q: I have been called to solve an air-quality problem at a house with air-lock entries. The house has hydronic heat. The vestibules have no mechanical ventilation, and the air quality is poor. What type of ventilation do you suggest for these very small rooms?