I’ve seen a homemade version of what Wiggum posted over a heat register. PVC that went both ways with a computer board fan to push the warm air. People had that at a snowmobile camp to dry boots, gloves, and helmets. They added small holes also to dry neckies n facemasks. Picture that Green Glove Dryer – longer and with different length uprights. The smaller hole were in between the uprights for lighter,quicker, drying items. I could give you a quick rough sketch if you want? I remember that thing working great with a large group staying in tight quarters and a crap ton of wet gear.