During the last few days, we've had some cool weather.
Yesterday, for the first time in months, I turned on the heat in the living room area. (Sanyo #1).
Had it set to 21C most of the day. The room temp stayed at 21 to 22 C (over-shoot).
In the evening (8PMish), I did some work down in my basement shop. (under the living room).
It felt kinda warm down there. I checked the basement temperature (3 feet from the A7) and it was just over 22 C
I've been logging room temp down there for over a month, and it should have been between 20 and 21C.
(I've just stopped logging. Waiting for some cold weather before resuming).
So, I suspect the warmth upstairs was heating the hardwood floor,
and some of that heat eventually leaked downstairs to the basement.
It seems, during the winter, the Sanyos will be helping the A7 heat the hot water tank.