TM-5-8554
e. Structurally, there is the greatest difference between the different types of hardened facilities just
described, but from the HVAC viewpoint there is much less difference because of the necessity of providing
openings to let air, personnel, equipment, and supplies in and out of the facility. This manual will focus
attention on the main complicating factors underground, which are the heat and moisture transfer at the
boundaries of the occupied space. Mathematical conventions used throughout this manual are listed in
appendix B.
f. Occupant survival and ability to function is necessary for accomplishing the mission of
practically all hardened facilities. Preventing entry of CB contaminants into the facility when attacked
is vital in this respect. The HVAC design must be conservative to a degree consistent with the other
elements of the facility. Long term mission, for instance, will require the facility to withstand multiple
attacks and to continue to function with minor repairs and resupply. Coordination of these design
objectives should be spelled out in the criteria. Design information to fulfill these objectives are discussed
in the five remaining chapters with definitions of abbreviations and terms contained in the glossary.
1 4
Previous Page
