The message
from The Natural Philosopher contains these words:

"Ventilated food cupboard"

Post the advent of the REFRIGERATOR these were deemed less necessary.

Well ventilated fridge radiators would help cut fuel bills somewhat.
I've seen loads jammed into tight fitting fitted kitchens with no effort
at all made to allow the heat to escape.

--
Skipweasel
Pay no attention to that man behind the curtain.