When the reaction is complete, the endothermic gas must pass through a gas cooler (h) which uses ambient air or water to bring the temperature of the endothermic gas below 300 ÂºF. The gas must be cooled quickly to prevent undesired chemical reactions that create carbon fallout.
If you only have a few hens and need to wait a few days or weeks to collect enough eggs for your incubator, then keep them around 50-60 degrees and 75% relative humidity. (Best hatch rate is with eggs stored less than 1 week.) Do not put in refrigerator. Put them in an egg carton with the big end of the egg up.hicken eggs are incubated at 99 to 99.5 degrees. Chicken eggs incubate for 21 days. Your countdown for days starts when you put your eggs in your incubator. It does not start when the hen lays her eggs.
1 The length of time it takes for eggs to hatch after incubation begins depends on the species and temperatures. 2  For bluebirds, it USUALLY takes about 12-14 days from the date the last egg was laid.3  Different species have different incubation periods, which can vary within a species due to temperature inside the nestbox. Depending on when incubation begins (on the last, or next to last egg), eggs in the same nest can hatch a day or several days apart. 2  It also takes a while for the bird to break through the shell. 3  It could be a new egg from a subsequent nesting if you didn't clean the box out immediately after the last fledging.