How about an external windshield and side window cover. That's what we use in our E450 based class C. Bonus being the heat is mostly reflected off rather than let into the cab and maybe removed by our single marginal AC unit.
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Pete and Carolynn Foss from Oxford, MI
2018 Four Winds 31W
1999 Aero Cub F-21 trailer
1977 Tioga 24 foot RV
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