Thank you for your article, "What are storm windows?" I was surprised that you did not mention anything about how storm windows improve energy performance in your article.
I have a few storm window studies on my website that look into the improvements in energy efficiency seen when storm windows are installed over an existing window. I think the results are surprising! High performance, dual-pane storm windows will be coming soon and will pay for themselves in a matter of months. A high-performance window can make a lot more sense than a cheap vinyl replacement (especially on historic homes.) Storm windows make too much sense to continue to overlook them in our world of rising energy costs, especially given recent improvements in window building product technology.