Single vs Double Hung window EE
Generally I understand that picture windows are the best for light if ventilation is not needed, and casements/awnings if ventilation is.
However I’m curious if single hung windows, which are somewhat of a mix of fixed picture window above a lower vertical slider are more efficient (better sealed) than double hung since the top unit is fixed, or is the difference negligible.
I know the ventilation benefit of cracking open both top and bottom sashes, but leaving that out of the equation.
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