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?
@salad started
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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.