Bubble Wrap Window Insulation for winter

I plan on doing this as I am tired of paying outrageous winter utility Bills supporting CEO bonus checks.

It looks very easy even an Idiot like Obama could do it, uh maybe LOL..

Here is the link and a small bit of what they claim.


[link to www.builditsolar.com]

The bubble wrap has a short payback in cold climates. About 2 months for single glazed windows, and half a heating season for double glazed widows. Details on payback:


For an 7000 deg-day climate (northern US), and single glazed windows, the bubble wrap increases the R value from about R1 to about R2. This cuts the heat loss from the window in half.
Heat losses with and without bubble wrap for 1 sqft of window are:



Heat loss w/o wrap = (7000 deg-day)(1 ft^2) (24 hr/day) / (1 ft^2-F/BTU) = 168K BTU per season



Heat loss with wrap = (7000 deg-day)(1 ft^2) (24 hr/day) / (2 ft^2-F/BTU) = 88K BTU per season



If you are heating with natural gas at $1.50 per therm (100 CF) in an 80% efficient furnace, then the saving for 1 sqft of wrap for the season is:



Saving per sqft = ($1.50)(168K - 88K)/(100K*0.8) = $1.65 per season per sqft of window



The bubble wrap cost about $0.30 per sqft, so the payback period is about 2 months -- not too bad!



If you repeat the numbers above for double glazed windows, the saving is $0.60 per sqft per season, and the payback period is a about one half heating season.



If you use a more expensive fuel like propane, fuel oil, or electricity, the savings will be correspondingly more.