June 99
TABLE 2.3
Degree-Days
Insulation Thickness
3000 & Below
25 mm (1")
3001 & Above
50 mm (2")
The insulation shall have an "R" value (Same units as
"U") of 5.0.
C. EXISTING CONSTRUCTION: The designer shall
examine the existing building envelope and
recommend the ways and means to improve it's
thermal efficiency. It is recognized that retrofitting the
existing walls with new insulation, and replacing
existing windows, is expensive; however, it should be
evaluated if it is economically and technically feasible.
2.3
ENERGY CONSERVATION:
A.
ECONOMIZER CYCLE: Depending on the system
configuration and facility location, evaluate the use of
an economizer cycle to obtain "free cooling" during
mild climate.
B.
ENERGY EFFICIENT MOTORS: Motors 0.8 KW (1.09
HP) and larger shall be high efficiency motors as
outlined in VA Standard Detail 15000-50.
2.4
OUTSIDE AIR REQUIREMENTS:
A.
MECHANICAL COOLING: For occupied areas
scheduled to be cooled mechanically, outside air for
ventilation shall be based on any one of the following
considerations with the highest value to be considered
for sizing the HVAC equipment.
0.4 m3/min. (15 CFM) per person.
1.
2.
1 air change per hour.
3.
Exhaust/Pressurization:
a.
Exhaust: To meet the exhaust air
requirements of toilets and janitor closets at
the rate of 15 air changes per hour. The
toilets need not be provided with ducted
supply air. The room air from the occupied
VA Design Guide -- National Cemetery Administration
Page 5 -56
Previous Page
