Just completed my 1st dry incubation in my new Sportsman 1502, and I am sold on Dry incubation.
I did not add any water to the incubator, the reading on the digtial display showed a RH of 21 to 25% during the incubation, and my room RH was 43 to 54%. 20 Maran eggs put in hatcher, and water added to raise the humidity during the hatch, and 20 eggs hatched.
So if the room you have your incubator in has a RH of around 50% you will do good with a dry incubation.
I did not add any water to the incubator, the reading on the digtial display showed a RH of 21 to 25% during the incubation, and my room RH was 43 to 54%. 20 Maran eggs put in hatcher, and water added to raise the humidity during the hatch, and 20 eggs hatched.
So if the room you have your incubator in has a RH of around 50% you will do good with a dry incubation.