scope:

PURPOSE AND SCOPE.

This document provides criteria and guidance for the design and construction of heating and cooling distribution systems and supplements information in the "Notes to the Designer" of the guide specifications. These distribution systems include Heat Distribution Systems in Concrete Trenches, Pre-engineered Underground Heat Distribution Systems, Prefabricated Underground Heating/Cooling Distribution Systems, and Aboveground Heat Distribution Systems. The mediums used in these distribution systems, as defined by the Department of Defense (DoD), include:

a. High temperature hot water (HTHW) (251 deg. F to 450 deg. F)

b. Low temperature hot water (LTHW) (150 deg. F to 250 deg. F)

c. Low pressure steam systems (up to 15 psig)

d. High pressure steam systems (over 15 psig)

e. Condensate return systems (up to 200 deg. F)

f. Chilled water systems.

APPLICABILITY.

These instructions are applicable to all \2\ DoD agencies /2/ and their contractors involved in the design and construction of heating and cooling distribution systems.