On Wednesday, 1 July 2020 16:11:31 UTC+1, wrote:

Simple way to keep a house cool, at least for several hot days, is to
keep windows closed and pull down blinds, during the heat of the day.
On an evening, once the outdoors cools down some, open the windows.

During the hot spell of last week, indoors it never exceeded a
comfortable 23.5C, when I was recording 31.5C outdoors.

Trouble is that leaving all windows open overnight is seldom practical. A fan enables leaving them locked ajar.


NT