The best thing to do is plug it in and run it. Glass will restrict the air flow, but that doesn't mean it won't work. you have to run it and have a couple thermometers to see the difference in temps from top to bottom, air flow is most important in helping reduce the temp difference. you might have to change things around a few times to get the best conditions. it took me about four changes with fan placing and cutting off some of the heat tape to get it where I wanted it. remember your incubator controls your temps. your egg box controls your humidity. good luck don