Yeah the A/C really doesn't matter, if its constant and the same temp. Yeah the Kitchen changes temp way to often and way to fast.(Atleast mine does) Cause I have the same kinda place and I tried my bator there and one min it was 99.9 then 101.0 then 89.0 then two hours later it was 110.0...all in two days I moved it to the back bedroom and it did stay at a great temp of 98.4(was the lowest it ever got) and 101.8 was the highest...I checked it over two days and ALL times of the day/night just to check...then I added eggs and kept checking it all the times. I did add water to keep the humidity at 30ish. I have had two great hatches from this great little bator OH and I never added a fan either. The only reason I'm not HATCHING HATCHING HATCHING is because I had a hard time finding chicks homes cause they are mostly mutt chickens and nobody really wanted...so in the future if I have to hatch more to my flock I WILL!!! I loved IT!!!!!!