Doesn't explain the AC, which I agree is really rare, but in some parts of the US (North East) fuel oil is commonly used for winter heating. Depending on grade

Doesn't explain the AC, which I agree is really rare, but in some parts of the US (North East) fuel oil is commonly used for winter heating. Depending on grade, fuel oil is sometimes synonymous with diesel, with the two are being served from the same tank. Map here: https://www.eia.gov/todayinenergy/detail.php?id=3690 https://www.eia.gov/todayinenergy/detail.php?id=3690 (with "fuel oil" being called "heating oil").