Attic ventilation and Home Performance
As always, I turn to the GBA community when I have a lingering question on my mind. This one is about attic ventilation.
How cost effective/necessary is the retrofitting of attic ventilation to an existing home? I see various studies on the topic, and I am interested in a more consensus opinion. If I am properly air sealing and insulating an attic, and the current ventilation levels are below building code, is it worth the time and money to add additional passive ventilation? Will the improvements to attic moisture levels be notable if the attic has already been air sealed? Will the cooling loads decrease notably if there is ductwork and/or an air handler in the attic?
I have a good understanding of the principles and strategies of attic ventilation, so the question is about the cost-benefit of adding attic ventilation rather than the physics behind its necessity (or the lack thereof...)
Any opinions would be much appreciated, as would any articles or studies on the topic.
Posted Wed, 05/04/2011 - 07:39
Other Questions in Energy efficiency and durability
Since drywall has a permeance of 0.02 liter/sec - m at 75 PA is ever possible to have sheathing dry to the interior of the home?