GBI carries air ventilators for glass block panels or even for individual use by themselves. These windows are great to put in basements, bathroom windows, smoking areas, or virtually anywhere you require fresh air.  With modern technology we have vents with Low E glass, True Thermo Break, and even vents that can be plugged in with powered fans offering 115 cfm's per fan. All our vents are made in the US using top notch vinyl.
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