It's very cold in her house, another couple of degrees won't hurt those chins at all. They can slowly be acclimated to a higher temperature. I remember saying to Brittney, "Why do you keep it this cold?" My chins are acclimated to about 75 right now, the room stays between about 72 and 75 at all times. I certainly would never have someone take a chin that is used to being at 65 degrees and subject it to temps in the mid-70s...that would be very uncomfortable for the chin.
In Phoenix it can be really hard to keep a house under 70 degrees even if you keep the A/C going on all day and all night. Today it was 111°F...it was just awful.
I've met people that acclimated their chins to 84 or 85 degrees, the chins' coats really seem to suffer at those high temperatures. I would never, ever let anyone adopt one of my chins and keep them that warm.
In Britteny's case, I wouldn't worry. It's super dry and I KNOW she will take it very slow with getting the chins used to a little higher temperatures. Honestly, I don't know how everyone in her house can deal with it being that freezing cold all the time! (And, her chins are spoiled and loved and very well cared for. There's NOTHING to worry about with her because Brittney takes excellent care of those little boys! Trust me, I know how to tell.)