We bought Styrofoam insulation sheet ( maybe 2” thick?) from Home Depot and cut 2 pieces that fit snugly against the step registers. Then my wife covered them with some heavy dark brown material so the aren’t noticeable. We have them in place whenever AC is running.
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Bill & Mary Van Nuys
Leavenworth, KS
2014 3735MK Legacy, Sailun 637s, TST 507RV TPMS, 2 Battle Born 100 AMP Lithium Batteries, Slide Toppers
2015 Chevy 3500 LTZ, 6.6L Duramax 4WD, CC, LB, SRW with Allison Transmission
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