As the Faulkners' marriage grew strained -- mostly because of his womanizing -- Faulkner added on a back bedroom upstairs, and Estelle moved into it. She enjoyed the light for painting, but she didn't enjoy the heat. And Faulkner wouldn't let her buy an air conditioner. An old Arkansas Democrat-Gazette article quotes Bill Griffith, curator of the estate, who explains the opposition, saying Faulkner believed people who used air conditioning "were trying to get rid of the weather."
From the same article: ""A lot of times, he wrote outside... And he started early. Those were two things that helped him. It was 20 degrees cooler outside under the trees than it was in the house.'" Inside, Faulkner and his family "made do with electric fans."