Because the Vanagon has so much window area, excessive heat loss/gain can be a problem.
The curtains that come standard with the Westfalia help to minimize solar gain during warmer weather but are of little benefit
during colder weather.
To help alleviate this problem
Warm Window fabric can be pinned to the existing curtains. The fabric consists of four layers of different materials quilted together
in 4" wide lengthwise channels (inset Curtains_B). An R-value of 7.5 can be achieved if the curtain perimeters are sealed
against the window frames.
On the sliding door the curtain can be held tightly to the bottom of the window frame with magnets (Curtains_A
& Curtains_E). The curtain retracts fully even with the added thickness of the Warm Window material (Curtains_C). The
bottom of the front curtain can be secured using elastic fabric and Velcro at the front corners (Curtains_B & Curtains_D)
and snaps elsewhere.
