Edgar's warming cabinet was a 20 inch cube and I had about a 4 X 5 inch opening front bottom and another one on the back of the cabinet at the top to allow natural cross ventilation. From there I could choke those off with magnetic sheets stuck to the inside over a portion of the opening to reach 140F. fwiw
And on the eighth day God created barbecue …. because he DOES love us and he wants us to be happy.
Current smokers: Egor (trailered RF) and Easybake (tabletop pellet drive)
I didn't calculate anything. I just figured I wanted a low inlet and a high outlet across the cabinet from each other to encourage natural convection and rising hot air, etc. I used small soffit vents from the hardware/lumber store. I just trimmed them down to fit where I wanted them - ROCKET SCIENCE!
And on the eighth day God created barbecue …. because he DOES love us and he wants us to be happy.
Current smokers: Egor (trailered RF) and Easybake (tabletop pellet drive)
I have a 24wX18dX40h cabinet, I have 6 - 2"x3" sliders on the bottom and a 5" round in the door. More inlets don't hurt if you can shut them off. Temperature control is everything!