Corpus sync: neutrality remakes, note hygiene, datasheet relocation, transformer-split cross-refs
---
title: Laboratory Casework and Fume Hoods
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- Seismic anchorage calculations (stamped)
- SEFA 8 third-party test report
−default: [Casework shop drawings (keyed to MEP rough-in), Product data (casework, work surfaces, hoods, fittings), Color and finish samples, Chemical-exposure matrix, SEFA 8 third-party test report]
+default:
+ - "Casework shop drawings (keyed to MEP rough-in)"
+ - "Product data (casework, work surfaces, hoods, fittings)"
+ - "Color and finish samples"
+ - "Chemical-exposure matrix"
+ - "SEFA 8 third-party test report"
```
### The casework shop drawings shall be coordinated with and signed off by the mechanical, plumbing, and electrical trades before they are submitted.
−### The chemical-exposure matrix shall identify any reagent that is incompatible with the proposed work-surface or casework material so the conflict is resolved before fabrication. {note}
+### The chemical-exposure matrix shall identify any reagent that is incompatible with the proposed work-surface or casework material so the conflict is resolved before fabrication.
## Informational Submittals {toc}
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- Record shop drawings
- Warranty documents
−default: [ASHRAE 110 As-Installed (AI) field test report (EHS signed), Commissioning record (face-velocity traverse, smoke), Record shop drawings, Warranty documents]
+default:
+ - "ASHRAE 110 As-Installed (AI) field test report (EHS signed)"
+ - "Commissioning record (face-velocity traverse, smoke)"
+ - "Record shop drawings"
+ - "Warranty documents"
```
# Quality Assurance {toc}
−## The casework manufacturer shall be regularly engaged in the production of laboratory-grade casework and shall hold current SEFA 8 third-party test reports for the supplied material class. {note}
+## The casework manufacturer shall be regularly engaged in the production of laboratory-grade casework and shall hold current SEFA 8 third-party test reports for the supplied material class.
### Casework shall be certified to the SEFA 8 sub-standard matching its material class — SEFA 8M (metal), 8PH (phenolic), 8W (wood), 8P (polypropylene), or 8PL (plastic laminate).
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# Environmental and Service Conditions {toc}
−## Casework and work-surface material shall be selected from the chemical-exposure class of the lab it serves; a generic selection made without a chemical-exposure matrix is the leading cause of premature surface damage and warranty disputes. {note}
+## Casework and work-surface material shall be selected from the chemical-exposure class of the lab it serves; a generic selection made without a chemical-exposure matrix is the leading cause of premature surface damage and warranty disputes.
−### The material selection shall be coordinated with the cleaning and decontamination protocol of the occupancy, because aggressive cleaning agents and frequent wet-down change the governing exposure. {note}
+### The material selection shall be coordinated with the cleaning and decontamination protocol of the occupancy, because aggressive cleaning agents and frequent wet-down change the governing exposure.
```datasheet
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### Epoxy resin work surfaces resist nearly all common laboratory reagents but are attacked by ketones and methylene chloride; polypropylene resists strong acids and bases but is incompatible with oxidizing acids; matching the substrate to the actual reagents is mandatory. {note}
−### Concentrated hydrofluoric acid attacks most work-surface materials and glass; areas where HF is handled shall use a material and finish documented by the manufacturer as HF-resistant. {note}
+### Concentrated hydrofluoric acid attacks most work-surface materials and glass; areas where HF is handled shall use a material and finish documented by the manufacturer as HF-resistant.
## Seismic Conditions {toc}
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# Casework Materials and Construction {toc}
−## The casework substrate shall be selected for the chemical-exposure class, the cleaning protocol, and the structural duty of the lab; each material trades chemical resistance, cleanability, and cost differently. {note}
+## The casework substrate shall be selected for the chemical-exposure class, the cleaning protocol, and the structural duty of the lab; each material trades chemical resistance, cleanability, and cost differently.
```datasheet
…40 unchanged lines
## Mounting System {toc}
−### The casework mounting system shall be selected for serviceability and reconfiguration needs and coordinated with the slab and wall construction. {note}
+### The casework mounting system shall be selected for serviceability and reconfiguration needs and coordinated with the slab and wall construction.
```datasheet
…56 unchanged lines
# Work Surfaces {toc}
−## The work-surface substrate shall be selected from the chemical-exposure class and specified by material and thickness; the substrate is the most chemically abused surface in the lab and a mismatch fails fastest. {note}
+## The work-surface substrate shall be selected from the chemical-exposure class and specified by material and thickness; the substrate is the most chemically abused surface in the lab and a mismatch fails fastest.
```datasheet
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# Fume Hoods {toc}
−## The fume hood type shall be selected for the energy code, the containment duty, and the renovation constraints of the project; the choice drives both safety performance and lifetime HVAC energy. {note}
+## The fume hood type shall be selected for the energy code, the containment duty, and the renovation constraints of the project; the choice drives both safety performance and lifetime HVAC energy.
```datasheet
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## Sash {toc}
−### The sash configuration shall be selected for the work task and for face-velocity uniformity; the sash type determines the openable area and how velocity distributes across the face. {note}
+### The sash configuration shall be selected for the work task and for face-velocity uniformity; the sash type determines the openable area and how velocity distributes across the face.
```datasheet
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### The rear baffle shall be adjustable to distribute exhaust across the upper and lower slots and shall be removable for cleaning.
−### The airfoil sill shall be designed to sweep the bench surface and shall not create a turbulent recirculation zone at the hood face. {note}
+### The airfoil sill shall be designed to sweep the bench surface and shall not create a turbulent recirculation zone at the hood face.
# Service Fixtures {toc}
−## Utility service fixtures mounted on casework and fume hoods shall comply with SEFA 7 for color coding, valve handle abbreviation, and performance. {note}
+## Utility service fixtures mounted on casework and fume hoods shall comply with SEFA 7 for color coding, valve handle abbreviation, and performance.
### Each service fixture shall be color-coded and labeled per SEFA 7 so the medium (gas, air, vacuum, water) is identifiable at a glance.
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# Accessibility {toc}
−## Each laboratory suite shall provide at least one accessible workstation and one accessible fume hood location; standard hoods have a 36 in. sill and require a modified base or pedestal to meet reach range, so the accessible location must be coordinated early. {note}
+## Each laboratory suite shall provide at least one accessible workstation and one accessible fume hood location; standard hoods have a 36 in. sill and require a modified base or pedestal to meet reach range, so the accessible location must be coordinated early.
### The accessible work-surface height shall not exceed 34 in.
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```
−### Vented storage cabinets connected to the hood or exhaust system shall be coordinated with the exhaust design under [[sync/laboratory-exhaust-and-fume-hoods]] so the added load is accounted for in the airflow balance. {note}
+### Vented storage cabinets connected to the hood or exhaust system shall be coordinated with the exhaust design under [[sync/laboratory-exhaust-and-fume-hoods]] so the added load is accounted for in the airflow balance.
−# Performance {toc}
+# The fume hood design face velocity shall be set from a hazard assessment per ANSI/ASSP Z9.5-2022, not from a single prescriptive number; the standard has shifted from fixed face velocity to a performance-based approach. {note}
−## The fume hood design face velocity shall be set from a hazard assessment per ANSI/ASSP Z9.5-2022, not from a single prescriptive number; the standard has shifted from fixed face velocity to a performance-based approach. {note}
+## The design face velocity shall be specified with the sash position at which it is measured; "100 fpm" at full-open is a different requirement than "100 fpm" at the 18 in. working position, and the sash height must always be stated.
−### The design face velocity shall be specified with the sash position at which it is measured; "100 fpm" at full-open is a different requirement than "100 fpm" at the 18 in. working position, and the sash height must always be stated. {note}
+## The design face velocity at the working sash position shall be as scheduled, with a typical range of 80 fpm to 100 fpm for general chemistry.
−### The design face velocity at the working sash position shall be as scheduled, with a typical range of 80 fpm to 100 fpm for general chemistry.
−
```datasheet
label: Design face velocity (at working sash position)
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```
−### No individual face-velocity measurement in the traverse shall deviate more than 20% above or below the average.
+## No individual face-velocity measurement in the traverse shall deviate more than 20% above or below the average.
−### A VAV hood shall have an EHS-approved minimum exhaust setpoint, typically 300 CFM to 400 CFM, coordinated with room pressurization and makeup-air capacity.
+## A VAV hood shall have an EHS-approved minimum exhaust setpoint, typically 300 CFM to 400 CFM, coordinated with room pressurization and makeup-air capacity.
```datasheet
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```
−### The VAV minimum-flow setpoint shall be coordinated between the hood supplier and the HVAC controls contractor; an unmatched minimum causes room pressure imbalance and containment spillage. {note}
+## The VAV minimum-flow setpoint shall be coordinated between the hood supplier and the HVAC controls contractor; an unmatched minimum causes room pressure imbalance and containment spillage.
−### A 6 ft CAV hood at 100 fpm with an 18 in. sash opening typically exhausts 700 CFM to 1,000 CFM; this airflow is a load on the exhaust system specified under [[sync/laboratory-exhaust-and-fume-hoods]]. {note}
+## A 6 ft CAV hood at 100 fpm with an 18 in. sash opening typically exhausts 700 CFM to 1,000 CFM; this airflow is a load on the exhaust system specified under [[sync/laboratory-exhaust-and-fume-hoods]]. {note}
# Testing {toc}
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# Installation {toc}
−## Casework and hoods shall be installed plumb, level, and rigidly anchored, with continuous bench runs aligned and work surfaces sealed at walls and between sections. {note}
+## Casework and hoods shall be installed plumb, level, and rigidly anchored, with continuous bench runs aligned and work surfaces sealed at walls and between sections.
### Casework shall be anchored to the structure per the approved seismic anchorage details.
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### Service fixtures and drops shall be connected only after the rough-in locations on the approved shop drawings are verified in the field.
−### The fume hood shall be connected to the exhaust collar furnished under [[sync/laboratory-exhaust-and-fume-hoods]]; the responsibility split at the collar shall be confirmed before installation to avoid a gap in scope. {note}
+### The fume hood shall be connected to the exhaust collar furnished under [[sync/laboratory-exhaust-and-fume-hoods]]; the responsibility split at the collar shall be confirmed before installation to avoid a gap in scope.
### Protective coverings shall remain on work surfaces and hood liners until final cleaning.
# Delivery, Storage, and Handling {toc}
−## Casework and hoods shall be delivered, stored, and handled to protect finishes and work surfaces from impact, moisture, and contamination. {note}
+## Casework and hoods shall be delivered, stored, and handled to protect finishes and work surfaces from impact, moisture, and contamination.
### Materials shall be delivered in the manufacturer's protective packaging and shall not be delivered until the space is enclosed, weather-tight, and the wet trades are complete.
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# Warranty {toc}
−## The manufacturer shall warrant the casework, work surfaces, and fume hoods against defects in material and workmanship for the specified period. {note}
+## The manufacturer shall warrant the casework, work surfaces, and fume hoods against defects in material and workmanship for the specified period.
### The casework and work-surface warranty period shall be as specified, with a minimum of one year from Substantial Completion.
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# Spare Parts {toc}
−## Spare parts and maintenance materials shall be furnished so that finishes and wear items can be maintained without re-procurement. {note}
+## Spare parts and maintenance materials shall be furnished so that finishes and wear items can be maintained without re-procurement.
### The Contractor shall furnish touch-up finish for the casework powder coat and matching sealant for the work surfaces.
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### Spare ductless-hood filter sets, where ductless hoods are provided, shall be furnished in the quantity recommended by the filter manufacturer for the first year of service.