You're right! AC! - I haven't used the AC here since we moved from Houston. I am used to have the house in the mid 80's and prefer to have all windows open so that the wind can blow through and cool me down.Well some folks brooding in air conditioning and 2 week old duckling may be chilled if they are unusually noisy and have plenty of feed and water. I did watch my last set of ducklings closely since I usually let mama brood and they only used the heat plate the first two weeks where they got under after that it was on top . Our house is 74-75 . Like you say we just have to watch how they behave. All depends on what temps everyone is having since we’re all from different parts of this big world. I am just hesitant to tell someone they don’t need heat and then they listen to me and something happens. I’d rather err on the side of caution.