The cupboard is ventilated as I said, it has 2 intakes, 1 outtake and an internal fan, usually puts me 3-5c above external temperature, I live in Australia and its been upto 39c recently from the usual 25-30c so 44c is gonna be a plant killer.
Its all because of stupid work keeping me back so I didn't get home in time for the sun hitting the main windows which on days like that needs the aircon on full for an hour to get the room down to 25c.
We learn, got a 150mm venting fan fan moved teh box into the back room.
Still have 1 baby alive.