Since i have noway of measureing the pressure inside my incubator, I am only assuming that I do have positive pressure. My air vent is just a 1/4in hole drilled in the exterior side panel of the incubator, about level with the fan location, and inbetween the false wall and the back exterior wall. I dont know if it makes any difference if the hole is drilled where I did it, or if it would be better to place it directly behind the fan. It is where it is in my incubator because that is the spot I had intended to bring in the power cord. I changed my mind about the power cord location and had the hole to deal with. Since I needed a fresh air vent, I left the hole open. Since I think I do have some positive pressure, I can assume that I have air leakage around the front door to let some air excape, this is what would create the fresh air exchange. A lot of guessing and assuming on my part since I have no way of measureing the exchange or air pressure, but since my eggs hatch, I can only guess that my guesses are correct.
You didnot say what kind of turning trays you where going to be using, but since you will be plugging and unplugging the individual trays, i am assuming you will be using the plastic turning trays like go in the small styrofoam incubators. If this is the case, why does the electrical connection need to be at the back of the cabinet, why not mount it close to the front where access is easier, maybe even plugging in at the top instead of the bottom. I cant visualize what you are trying to do with the electrical connection, so maybe my suggestion wont work. If you go to a electronics supply store, you should be able to find smaller electrical connetions than a house type plug receptical. I'm thing a small surge protector with enough outlets for ever how many trays you plan on using?????
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I know every kind of thermostat is going to work a little differently, but I prefer to have my thermostat mounted above the top shelf where air from off the heat strip can blow across it. That might be the way Rebel is decribing it, but his wording sort of has me confused. My reasoning for this is I want the air blowing down toward my eggs to be pretty close to the 99.5 degrees I incubate my eggs at. Air that has to return up thru the the backside of the false wall is going to be slightly cooler than the air entering the tray area. A Temp reading in the return air area will probably be lower than what would be measured at the egg trays. I guess either method would work as long as you are using a seperate thermometer to monitor the actual temp in the tray area. The area above my tray area, where the heater and fan are mounted, I call my heat reservoir and I try to monitor the heat there so that it is around 100*-100.5* at all times. I check this from time to time with a infared thermometer, I didnt design it this way, its just the way it worked out. I really only need to know this information incase I decide at some point to try a digital readout thermostat and want to fine tune the settings. As long as the temp in the tray area remains around 99.5*, it doesnt really matter what the temp is in the heat reservoir
