Both the caravans and exploding house scenarios may benefit from heat
recovery ventilation, where a structure containing a heat exchanger is
used to ensure the inside of the box never has an atmospheric mix
unlike the standard planetary atmosphere.

On the other hand, if it is standard an attacker could figure out
where to insert their attack.

--=20
James Cameron
http://quozl.netrek.org/
--=20
http://www.piclist.com/techref/piclist PIC/SX FAQ & list archive
View/change your membership options at
http://mailman.mit.edu/mailman/listinfo/piclist
.