by Dale Williams » Sat Jul 23, 2011 11:46 am
As hot as I remember here (103 yesterday, and more importantly many days in a row of over 90, so not enough evening cooldown). I have a fairly deep (below grade stone walls on 2 sides, 2 well insulated walls facing basement) cellar in Westchester county, just north of ciiy. At top of my cellar it hit 70F yesterday (highest spot, usually 5-6 cooler at lowest part), as high as it has ever gotten. I put on (unfortunately mounted low) AC I installed couple years ago, quickly dropped to 67 at top. My usual range is 50-68 at top with slow seasonal changes, which is ok with me (passive cellars are limited by local ground temps, for here perfect insulatation would be about 54 degrees). I'd worry more re quick changes, I've never seen more thsn 1-2 degrees F per day.