Watch the savings add up!

Andersen Windows e-mailed me a lengthy explanation of the trade-offs between their regular glass and their SmartSun glass, including a phenomenal example of math illiteracy:

Single Pane Replacement
Minneapolis
% Winter Energy Savings
% Summer Energy Savings
% Annual Energy Savings
HP4
39%
41%
80%
SmartSun
37%
55%
92%
Improvement
15%

Yes, boys and girls, if you save 37% of your energy usage in the winter and 55% of your energy usage in the summer, you save 92% annually! If you want to save more, take your percentage of energy savings every day and add up all of those percentages: you could save 9000% or more!