Does a low-e coating really help minimize heat loss from the interior to exterior? Low-e coatings are used to reflect incident radiant energy. Does it really keep the radiant energy from a light fixture in? If its a cold climate, wouldn't you want your glazing to not have a low-e coating so that more radiant energy from the exterior could get in?
Even though answer #4 has the clearer glass, I chose answer #3 because it makes sense to let more radiant energy in. What am I missing?
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