When you compare the cost saving in utility bills between unrepaired wood windows with no storms and new vinyl windows that is not the same as comparing it to refurbished wood windows with properly installed storm windows.

That would be the fair comparison but there is no practical way to do it.

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[SIGPIC] Diesel loving autocrossing grandpa Architect. 08 Dodge 3/4 ton with Cummins & six speed; I have had about 35 benzes. I have a 39 Studebaker Coupe Express pickup in which I have had installed a 617 turbo and a five speed manual.[SIGPIC]

..I also have a 427 Cobra replica with an aluminum chassis.