JULY 2005
SOLICITATION FOR OFFERS
OUTPATIENT CLINIC
SFO NO. V101-183R-xxx-xxx-xx
[INSERT LOCATION OF FACILITY]
Select a different type of cooling tower
Select a different location for the cooling tower
Use acoustical treatments until the 60 dba noise requirement is met.
6.5.1.11 VIBRATION CRITERIA:
Equipment vibration provisions shall comply with the latest ASHRAE Handbook Applications.
6.5.2
HVAC EQUIPMENT SIZING CRITERIA:
6.5.2.1 AIR HANDLING EQUIPMENT:
To compensate for the duct air leakage and any future space internal heat gain, the equipment must be
sized in accordance with the following guidelines:
Load Calculations: Heat gain calculations must be done in accordance with the procedure outlined in the
latest ASHRAE Handbook of Fundamentals. The calculations performed either manually or with a
computer program shall not include any built-in safety factors.
The calculated supply air shall be the sum of all individual peak room air quantities without any diversity,
even for the variable air volume systems.
Safety Margin: A safety factor of 5 percent shall be applied to the calculated room air quantity to allow for
any future increase in the room internal load.
6.5.2.2 DUCT AIR LEAKAGE:
The leakage of the air through the supply air distribution ductwork shall be computed on the basis of the
method described in the SMACNA Air Duct Leakage Test Manual. The maximum leakage amount shall
not exceed 4% of the adjusted supply air volume at 2 inches water gage pressure.
6.5.2.3 REFRIGERATION EQUIPMENT SIZING:
The capacity of the refrigeration system including accessories shall be based on the sum of the total
cooling requirements of all connected air handling units. No additional safety factors should be required.
6.5.2.4 PIPE SIZING CRITERIA:
Pipe sizing shall be based on "Cameron Hydraulic Data" with C=100 for open systems and C=150 for
closed systems. For closed systems, the limited maximum pressure drop shall be 4.0 feet of water per
100 equivalent feet of piping. Additionally, the pipe velocity is limited to 4.0 feet per second in occupied
areas and 8.0 feet per second in piping over 1-1/4 inches in diameter. For open systems, the maximum
pressure drop is limited to 4.0 feet of water per 100 feet of installed pipe. The maximum velocity for an
open system is 10 feet per second.
6.5.2.5 DUCT SIZING CRITERIA:
Duct systems shall be designed in accordance with the general rules outlined in the latest ASHRAE Guide
and Data Books, SMACNA Manuals and Design Guide Section of the Associated Air Balance Council
Manual.
Supply duct system, with total external static pressure 2 inches and larger, shall be designed for a
maximum duct velocity of 2500 fpm for duct mains and a maximum static pressure of 0.25 inch of water
gage per 100 ft. Static pressure loss and regain shall be considered in calculating the duct sizes. Size
supply branch ducts for a maximum duct velocity of 1500 fpm.
Part I: Basic Solicitation Requirements Page 94 of 169
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