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Professional
Archived Posts from this Category
February 11, 2010
In what year did Code begin requiring wall insulation?
Posted by Laura under Home Owner, Insulation, ProfessionalLeave a Comment
February 1, 2010
Heated air is less dense than cold air, so houses tested in cold weather appear leakier than they really are (by about 1 percent for each 10 degrees F difference between indoor and outdoor temperature) unless an adjustment for temperature has been made. Otherwise, testing will indicate the amount of less dense air flowing through the blower door, and not the amount of colder, denser air flowing through the holes. From the Journal of Light Construction article: Blower Door Testing by David Keefe, January 2010 issue.
January 27, 2010
What year was your home built?
Posted by Laura under Home Owner, Professional, Year BuiltLeave a Comment
Many historic buildings have energy saving physical features and devices that contribute to good thermal performance. Studies by the Energy Research and Development Administration show that the buildings with the poorest energy efficiency are actually those built between 1940 and 1975.
Read more about historic buildings here: http://www.nps.gov/hps/tps/briefs/brief03.htm
January 26, 2010
Natural Gas usage in Cville
Posted by Laura under Home Owner, Natural Gas, Professional[2] Comments
Charlottesville Gas has given natural gas users a valuable piece of energy efficiency information. Analyzing their data according the method described below, Charlottesville Gas has determined that for homes that heat with natural gas (more…)
January 2, 2010
I bought two pressure pans last week from Energy Conservatory, one large for measuring duct leakage at supplies & returns and one small for measuring air leakage at outlets, switches and recessed lights. I am really looking forward to having these tools to better diagnose duct leakage. Here’s what Energy Conservatory has to say:
Pressure Pan
