06-06
The following HVAC related work is generally shown by other
disciplines:
A. Architectural drawings and specifications provide all louvers and
attached screens in exterior walls, all flashing for ducts and piping
penetrating roofs and exterior walls, finish and identification
painting, walls and ceilings, access panels, chases, furred spaces,
door grilles, mechanical equipment rooms, and penthouses.
B. Structural drawings and specifications provide all concrete and
structural steel work, including catwalks, concrete housekeeping
pads, lintel supports around openings, and platforms for access to
HVAC equipment and supports for cooling towers and other large
mechanical equipment.
C. Electrical drawings and specifications provide motor starters and
disconnectors, not furnished as part of HVAC equipment, smoke
detectors (duct and/or space mounted), all power wiring to HVAC smoke
dampers, motors, heating cable, and controls for winterized piping.
D. Plumbing drawings and specifications provide all domestic water
make-up supply and drain outlets.
2. BASIC DESIGN PARAMETERS
2.1 CLIMATIC CRITERIA
The capacity calculations for the HVAC systems shall be based on the
outdoor climatic conditions listed in Supplement, ATTACHMENT No. 6.
The designer shall use the following values:
A. Summer
1 percent design dry bulb and wet bulb temperatures
Column 2a.
B. Winter
99 percent design dry bulb temperature Column 2b
C. The specified design wet-bulb temperature for cooling tower shall be
1 percent outdoor design wet bulb temperature in Column 3.
2.2 INDOOR DESIGN CONDITIONS (DEGREE C (F) DRY BULB AND PERCENT RELATIVE
HUMIDITY)
Table 2 - 1 Indoor Design Conditions
Summer
Winter
Db C (F)
Db C (F)
Room or Area
%RH
%RH
Offices, Conference
25 (78)
50
22 (72)
See
Rooms, Lounges
Note 5
Computer Room(s)
21 (70)
40(+5)
21 (70)
40(+5)
Electrical Equipment
39 (104)
-
10 (50)
-
Rooms
Maximum
3
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