• Yes they do reflect heat gain in winter, but I believe they also work better at keeping heat in the house, so less heat loss.

  • I believe they also work better at keeping heat in the house

    not sure how that is supposed to work to be honest

  • I guess for starters, it adds more layers to your glass, so slightly more insulation.
    And if more reflective than glass, would reflect radiation back into the house?

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