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RECTANGULAR DUCT CONSTRUCTION
<br />GALVANIZED STEEL: 2" STATIC PRESSURE
<br />2"WG
<br />RECTANGULAR R • • STANDARDS F 3Seal Class C
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<br />DUCT CONSTRUCTION STANDARDS })Hermanson
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<br />RECTANGULAR DUCT CONSTRUCTION
<br />GALVANIZED STEEL: 3" STATIC PRESSURE
<br />LoMl udi 1 Sear. Types
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<br />RECTANGULAR DUCT CONSTRUCTION
<br />GALVANIZED STEEL: 4" STATIC PRESSURE
<br />4" W G
<br />RECTANGULAR DUCT CONSTRUCTION STANDARDS
<br />Seal
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<br />DUCT
<br />PRESSURE CLASS LAST UPDATED: 05/25/22
<br />PRESSURE
<br />DUCT TYPE
<br />DUCT LOCATION
<br />RATING
<br />REMARKS
<br />MEDIUM PRESSURE SUPPLY DUCTWORK FROM UNIT
<br />SUPPLY AIR
<br />DISCHARGE TO A QUICK ACTING FD, SD, FSD, OR MD
<br />POSITIVE 4-6
<br />DUCTWORK
<br />SEE FAN CURVE AT SHUTOFF CONDITION
<br />INCHES W.G.
<br />1 5 7 8
<br />MEDIUM PRESSURE SUPPLY DUCTWORK FROM QUICK
<br />SUPPLY AIR
<br />ACTING FD, SO, FSD, OR MD TO INLET OF VAV VALVE
<br />POSITIVE <2
<br />DUCTWORK
<br />SEE SCHEDULED ESP FOR FAN
<br />INCHES W.G.
<br />2,3
<br />SUPPLY AIR
<br />POSITIVE 3
<br />DUCTWORK
<br />PRESSURIZATION FAN SYSTEMS
<br />INCHES W.G.
<br />2 4 7 9
<br />SUPPLY AIR
<br />LOW PRESSURE SUPPLY DUCTWORK DOWNSTREAM OF VAV
<br />POSITIVE <-2
<br />DUCTWORK
<br />UNIT OR CONSTANT VOLUME UNIT
<br />INCHES W.G.
<br />2,3
<br />RETURN /
<br />EXHAUST AIR
<br />LOW PRESSURE RETURN DUCTWORK FROM GRILLE TO A
<br />NEGATIVE <2
<br />DUCTWORK
<br />QUICK ACTING DAMPER FD, SD FSD OR MD
<br />INCHES W.G.
<br />2,3
<br />RETURN /
<br />LOW PRESSURE RETURN DUCTWORK FROM A QUICK
<br />EXHAUST AIR
<br />ACTING FD, SO, FSD, OR MD TO THE INLET OF UNIT/FAN
<br />NEGATIVE <2
<br />DUCTWORK
<br />SEE SCHEDULED ESP FOR FAN
<br />INCHES W.G.
<br />1,31
<br />RETURN /
<br />LOW PRESSURE RETURN DUCTWORK FROM A QUICK
<br />EXHAUST AIR
<br />ACTING FD, SO, FSD, OR MD TO THE INLET OF UNIT/FAN
<br />NEGATIVE 3
<br />DUCTWORK
<br />SEE SCHEDULED ESP FOR FAN
<br />INCHES W.G.
<br />14 7 8
<br />SUPPLY /
<br />RETURN AIR
<br />OUTSIDE THE BUILDING ENVELOPE AND SERVING A
<br />DUCTWORK
<br />CONDITIONED SPACE
<br />ANY
<br />1 7 10
<br />TYPE 1
<br />KITCHEN
<br /><6 INCHES
<br />EXHAUST
<br />ICEILING, PLENUMS SHAFTS
<br />I W.G.
<br />2,6
<br />NU 1 tS:
<br />1 PRESSURE CLASS TO MEET OR EXCEED FAN CURVE (1.25 TIMES FAN ESP PRESSURE).
<br />2 PRESSURE CLASS TO MEET PRESSURE RATING INDICATED
<br />3 :52" PRESSURE WITH SEAL CLASS C (TRANSVERSE JOINT)
<br />4 3" PRESSURE WITH SEAL CLASS B (TRANSVERSE, LONGITUDINAL JOINT)
<br />5 >2" PRESSURE WITH SEAL CLASS A (TRANSVERSE, LONGITUDINAL & DUCT WALL PENE'S)
<br />6 CONTINUOUSLY WELDED CONSTRUCTION OR APPROVED EQUAL
<br />7 DUCTS TO BE LEAK TESTED ACCORDING TO SMACM HVACAIR DUCT LEAKAGE TEST
<br />MANUAL FOR AT LEAST 25% OF THE INSTALLED DUCT SYSTEM AREA
<br />8 TESTING NOT REQ'D FOR DUCTS OPERATING AT <3" W.G.(SEE EQUIPMENT SCHEDULE)
<br />RECTANGULAR DUCT CONSTRUCTION
<br />GALVANIZED STEEL: 6" STATIC PRESSURE
<br />6"WG
<br />RECTANGULAR DUCT CONSTRUCTION STANDARDS
<br />Seal
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<br />GALVANIZED ROUND DUCT CONSTRUCTION MATR__ OHermanson
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<br />2INa1 wG NEGATVE
<br />38 41N[H WG NEGATVE
<br />61N[H WG NfGAnVf
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<br />Hermanson
<br />Building Today, Defining Tomorrow
<br />Hermanson Company LLP
<br />1221 2nd Avenue North
<br />Kent, Washington 98032
<br />Tel: (206) 575-9700
<br />Fox:(206) 575-9800
<br />www.hermanson.wm
<br />Contractor Reg J: HERMACL0058J
<br />RTU
<br />REPLACE
<br />EVERETT MALL PLAZA, SUITE M
<br />1203 SE EVERETT MALL WAY
<br />EVERETT, WA 98208
<br />ODOR
<br />��9 De wnsy F•y
<br />,e��f614�
<br />ONAL 6
<br />October 12, 202?
<br />ISSUE FOR PERMIT
<br />Revisions
<br />10/07/22 JMH ISSUE FOR PERMIT
<br />_
<br />No. Date By Description
<br />Design Team
<br />Design JMH
<br />Drawn FVP
<br />Checked DTN
<br />Pre -Construction Number 14-22-22760
<br />Construction Number
<br />Issue Date 10/07/22
<br />CONSTRUCTION
<br />STANDARDS
<br />- HVAC
<br />M0.01
<br />
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