Production & Management Be careful when you change to different fans in an incubator By Jim - January 8, 2021 704 FacebookTwitterPinterestWhatsAppLinkedinReddItEmailPrintTumblrTelegramMixVKDiggLINEViber Please enjoy a series of Hatchery Tips provided By Aviagen: Tip 25 One fundamental requirement for hatching good quality chicks is providing the correct eggshell temperature(EST) throughout incubation.