JULY 2005
SOLICITATION FOR OFFERS
OUTPATIENT CLINIC
SFO NO. V101-183R-xxx-xxx-xx
[INSERT LOCATION OF FACILITY]
General Exhaust: Provide an exhaust air duct connection from the Infra Red Curing Oven. The oven is
equipped with an integral blower. The blower picks environmental air to discharge into the general
exhaust duct. Provide an air gap between the blower discharge duct and the general exhaust duct.
This oven is a VA furnished and VA installed item.
Special Exhaust: Provide a dedicated exhaust system to remove toxic chemical fumes, generated by
plastics and resins, over the plastics work area table. The work area table shall be provided with a
canopy hood (Type A, B, or C). The exhaust air quantity shall be based on 50 to 100 fpm face velocity
over the hood area. The ductwork shall be of corrosion resistant material or stainless steel. The fan
shall be of spark-proof construction material with explosion proof motor. The exhaust air shall be
discharged at the highest point above the building. Special exhaust fans shall be on emergency
power.
Welding Exhaust: For welding area, provide a pre-fabricated, engineered exhaust system complete
with special air inlets, flexible ductwork, solid sheet metal ductwork, exhaust fan, etc., to make a
complete system. The size and capacity of the welding system depends upon the extent of welding
activity, the number and locations of the special air inlets and special requirements, if any, of the
medical center.//
Editing Note: following paragraph applies to clinics
with a dedicated room for a MRI unit. Delete if mobile
unit will be used. See Paragraph 5.2.10.1
6.5.7.6 //MAGNETIC RESONANCE IMAGING (MRI) UNITS// // RESERVED//:
HVAC requirements for the MRI suite vary widely with the capacity and make of the imaging unit.
Information pertaining to indoor design conditions, internal heat gain, and shielding against Radio
Frequency (RF) and EMI (Electro-Magnetic Interference) shall be obtained from the equipment
manufacturer during design development phase of the design project.
Environmental Units: Provide a dedicated air-handling unit to serve the examination room and other
spaces associated with the MRI suite. Depending upon the specific needs of various spaces, conditioned
air shall be supplied by either constant or variable air volume terminal units serving as temperature control
zones. Comply with the following guidelines:
Provide an automatic emergency 100 percent exhaust system in the gantry room to remove helium
gas during an accidental spill. The minimum capacity of the exhaust system shall be 12 air changes
per hour or 1200 CFM. The gas shall be discharged at the highest point in the building. The oxygen
sensors shall activate the exhaust system when the level of oxygen drops below a predetermined
level. It is usually 18 percent.
Provide separate vents to remove helium gas produced during boil-off and quench of the magnet.
While the boil-off is a normal venting phenomenon, the quench occurs when a super conductive
magnet becomes resistive. Coordinate sizes of HVAC equipment, including pressure drops with the
magnet manufacturer. Helium liquid turns into gas and tends to occupy enormously high volume.
The air distribution ductwork shall be constructed of either PVC or aluminum to maintain the integrity of
the magnetic field.
6.5.7.6.1 Computer Cooling Units:
This unit is required for the High-field system only. The specific requirements are:
The air supply outlets shall be located at the floor level with the air directed toward the cabinet inlets.
The return air inlets shall be located at the ceiling level, above the cabinets, and near equipment
exhaust.
Part I: Basic Solicitation Requirements Page 102 of 169
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