On 07/12/2017 20:18, T i m wrote:
On Thu, 7 Dec 2017 07:58:49 -0800 (PST), whisky-dave
wrote:

snip daves wittering

So, as I said previously, the presence of the swing doors may not
impact the calcs if the temperatures are roughly the same on both
side. The chances are that will be more likely when the doors are open
rather than closed.

what about the other two sets of swing doors, which go to unheated corridor areas ?

Then they will be more relevant.

snip waffle

Indeed if they are open the room will lose the hot air at around head
height as it spills out and rises up on the wrong side of the door.

Can an engineering department really be so clueless about basic physics?

They deserve to suffer from frostbite in the coming winter!

--
Regards,
Martin Brown