Ask The Guru: Energy Savings


OK, so you want to know more about Energy Savings. First check the questions and answers below and see if your question is already here. There's a good chance that it is. If not, no problem, just use the form at the bottom of the page to send me your most burning question about Radiant Barrier and Energy Savings and I'll send you an answer shortly.

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    I live in Atlanta, GA and am considering installing AtticFoil. I have a large home and am trying to compute the energy savings and payback period if I invest in attic foil. My existing electric bill averages $468/month in the winter months when NO AC is used. Therefore, all other months I'm figuring the excess over $468 is due to AC, which in my case is $2,082 annually. My understanding is that most of the energy savings comes from saving on AC and that while attic temps may be reduced by up to 40% only 25% of the AC load is due to the loss of cool air through the ceiling. Therefore, .40x.25= a 10% annual savings or, in my case $200 plus whatever savings I get from reduced heating costs. Am I correct with these assumptions?

    Trying to predict savings from installing radiant barrier is kind of like nailing jello to the wall. Here are just a few variables that make predicting savings a challenge: geographic location, size of home, number of stories, shape of home, air infiltration, sun exposure, shading, condition of HVAC system, window exposure, lifestyle, etc. The list can go on and on...