My husband made this rack for me after I showed him various photos of everyone else's racks. The tubs are from the Container Store. The entire unit measures 51" tall by 38" wide by 18" deep. It has the 11" by 12" size heat tape on the top 5 shelves and will have the 4" running along on the 2 bottom shelves. The heat and humidity is still adjusting, so don't mind the thermometer.

So I have a question. Is the gap at the top of the tubs between the plastic and the wood a large enough space for air or do I need air holes in the tubs? It is about a quarter of an inch more or less.