I'm seriously considering some upgrades to my 1989 17-foot Bigfoot
to make it more useful in cold-weather service. In addition to UltraHeat (or similar) tank and pipe heaters, I'm considering the replacement of all the single pane windows
with thermal pane versions. The original windows
are all made by Sun-View Industries in Summerland BC, a company that is still alive and well today. Before I measure all the windows
and request a quote, I wonder if anyone else has done this upgrade and, if so, is there anything I should consider or be aware of that might not be so obvious? For anyone who has done this, do you recall what your total cost of the upgrade was?