436-22-122 Emergency Lobby Iso-Rooms HVAC Basis of Design.pdf
PDF 70 KB Posted
- Attached to
- Z2DA--436-22-122 ED Entry and Lobby Remodel
- Solicitation number
- 36C25923R0052
About this file
This document outlines the scope of work for an emergency department HVAC upgrade project at a Veterans Affairs medical facility. The project requires installing a new filtered air exhaust system to provide 12 air changes per hour for two new emergency department isolation rooms, their associated isolation corridor, and one existing exam room being converted to an isolation room. The scope also includes selecting a new 1000 CFM exhaust fan and upgrading existing VAV terminal units to operate in a CAV mode when the isolation rooms are in use. Room airflow requirements, pressure differential specifications, and alarm parameters are defined. The related federal contract opportunity is solicitation number 36C25923R0052 for an emergency department entry and lobby remodel issued by the Department of Veterans Affairs Veterans Health Administration Veterans Integrated Service Network 19.
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Other files
| File | Type | Posted |
|---|---|---|
| 36C25923R0052 0001.docx | DOCX document | |
| 436-22-122 Combined CD Set 12_21_21.pdf | ||
| Past Performance Questionnaire.docx | DOCX document | |
| 436-22-122 Specifications Divisions 21-28.pdf | ||
| Wage Determination MT20230040 1 20 2023.pdf | ||
| 36C25923R0052_2.docx | DOCX document | |
| 436-22-122 Specifications Divisions 1-13.pdf |
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Text version
Minimum Air flow
Room# Area SF C-Height Volume ACH Min CFM
78 103 8 824 12 165
79 104 8 832 12 166
A200 110 8 880 12 176
A201 81 8 648 12 130
C-125 98 8 784 12 157
794 min fan flow
Select new fan @ 1000cfm
Scope of Work:
Provide/Install a new filtered air exhaust system that will provide 12 air changes per hour (ACH) to the two new Emergency Department Airborne Infection Isolation/Waiting (Negative Air) Rooms, their associated Airborne Infection Isolation (Negative Air) Corridor and one existing exam room (A79), to be turned into a third Emergency Department Airborne Infection Isolation/Waiting (Negative Air) Room.
Existing rooms within SOW:
Rm. 78 Rm. 79 Rm. A200 Rm. A201 Corr. C-120
Airflow Resistance:
Length
Loss/100ft
(inch wc)
Total Loss
(inch wc)
Ductwork= 50 0.12 0.06 fittings= 0.09
MERV8= 0.3
*HEPA= 1.35 * Based on Cam-Fil high capacity HEPA filters
Dirty HEPA= 1.00
Volume dmp= 0.1
Total= 2.9
Sizing new Fan= 1000cfm@3.0" w.c.
Fan Selection= Cook Model=120CA-SWSI
1.5hp Motor
Upblast position with 5ft vertical stack
Sequence of Operation:
New Exhaust Fan to operate only when Iso-Rooms are in use:
Areas within SOW are supplied by VAV-16 and 18. Since the new Exhaust fan will only be used in the event the isolation rooms are needed a multimode function is necessary for the spaces within the SOW, Normal and Isolation mode.
Normal Mode: VAV-16 and 18 will operate in a normal VAV heating and cooling mode to maintain zone temperature setpoint with return air back to
AHU-1.
Isolation Mode: VAV-16 and 18 will operate in a CAV mode (Fixed air flow), New exhaust fan will be enabled and return air from Rm. 78,79,A200,A201 and C120 will be isolated, via control damper. A room pressure sensor will monitor the differential pressure between isolation rooms and adjacent non-isolation areas. Differential pressure must be maintained at min -0.01"wc. Each of the five rooms shall have minimum -60cfm, air flow differential between supply and exhaust. TAB contractor shall determine final flow differential for -0.01" pressure differential. Alarm shall be initiated at BMS when the room pressure differential is out of range (neutral or positive) for a time period longer than 10 sec(adj)
Verify existing VAV terminal reheat capacity and controller capabilities, existing VAV must be able to operate as a CV terminal when the Iso-fan is in operation.
AutoCAD SHX Text 170cfm
AutoCAD SHX Text 170cfm
AutoCAD SHX Text 180cfm
AutoCAD SHX Text 160cfm
AutoCAD SHX Text 160cfm
AutoCAD SHX Text Rm.A78
AutoCAD SHX Text Rm.A79
AutoCAD SHX Text Rm.A200
AutoCAD SHX Text Rm.A201
AutoCAD SHX Text Rm.C120
AutoCAD SHX Text
14X12UP TO ROOF
AutoCAD SHX Text
FILTER BOX
AutoCAD SHX Text
NEW UTILITY FAN
AutoCAD SHX Text
ROOF
AutoCAD SHX Text
LOW LEAK ISOLATION DAMPER
AutoCAD SHX Text
EXISTING RETURN DUCT
AutoCAD SHX Text
RELOCATE EXISTING RETURN DUCT TO ACCOMMODATE NEW RETURN FOR WAITING ROOM AREAS
AutoCAD SHX Text 10x10 RETURN GRILL, TYPICAL OF 3
AutoCAD SHX Text Rm.C120
AutoCAD SHX Text Rm.A201
AutoCAD SHX Text Rm.A200
AutoCAD SHX Text
MOD
| SKETCH1.pdf |
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