Comment by eagerpace

It says “only 20% more than energy efficient windows” but those “energy efficient windows” are usually 50% more than the average quality window. Higher quality triple pane windows exist, and they are a luxury for most homeowners. It’s great technology, but relatively few people build or upgrade their house with the long term consequences in mind for these things. There’s a reason you get a positive ROI when you fix up a kitchen or bathroom versus replacing windows which is typically viewed as maintenance. There needs to be incentives for these upgrades to be adopted by home builders.