Ducted Fume Hoods — Building-Exhausted Chemical Ventilation
Ducted laboratory fume hoods. 4’–8′ widths. ASHRAE 110 tested. Vertical and horizontal sash. Full chemical compatibility. Free spec assistance.
Talk with a lab furniture specialist · (801) 855-8560 · Sales@Labs-USA.com
Ducted Fume Hoods — The Standard for Chemical Laboratories
Ducted fume hoods connect to the building’s exhaust system, pulling air across the work surface and out through ductwork to the roof. They provide the broadest chemical protection because all vapors are removed from the building entirely — no filtration limitations, no filter replacement, and no chemical compatibility restrictions.
Labs USA supplies ducted fume hoods in 4′, 5′, 6′, and 8′ widths with vertical sash, horizontal sash, or combination sash options. All hoods meet ASHRAE 110 performance standards and come with airflow monitors, sash alarms, and service fixtures as specified.
Available Configurations
| Width | Typical CFM | Best For |
|---|---|---|
| 4′ (48″) | 600–800 CFM | Individual workstations, small labs |
| 5′ (60″) | 750–1,000 CFM | General chemistry, analytical labs |
| 6′ (72″) | 900–1,200 CFM | Organic synthesis, multi-user hoods |
| 8′ (96″) | 1,200–1,600 CFM | Large apparatus, distillation, shared hoods |
Service Fixtures & Accessories
- Remote-operated service valves — Gas, air, vacuum, cold water, hot water on the side posts
- Electrical outlets — GFCI-protected outlets inside the hood for instruments
- Cup sinks — Epoxy or polypropylene with drain connections
- Airflow monitors — Digital face velocity display with audible/visual alarm
- Sash stops — Limit sash opening to safe working height (18″)
- Work surface options — Epoxy resin, phenolic resin, or stainless steel
Frequently Asked Questions
How much air does a ducted fume hood use?
A 6′ ducted fume hood at 100 fpm face velocity with an 18″ sash opening exhausts approximately 1,000–1,200 CFM. This air must be replaced by the building HVAC system (makeup air), which is the primary ongoing cost of ducted hoods. Variable Air Volume (VAV) systems reduce energy costs by adjusting exhaust based on sash position.
What liner should I choose for a ducted fume hood?
Epoxy-coated steel for general chemistry. Polypropylene for heavy acid work — especially hydrofluoric acid (HF), which attacks most other materials. Stainless steel for perchloric acid hoods (which require wash-down capability). Fiberglass-reinforced polyester (FRP) for strong acids and moderate solvent use.
Can I add a ducted fume hood to my existing lab?
Yes, but it requires HVAC evaluation. Your building must have enough exhaust capacity (or space for a new exhaust fan) and adequate makeup air. Labs USA evaluates your existing HVAC before specifying a ducted hood and coordinates with mechanical contractors for ductwork installation.
Related Pages
Get a Quote on Ducted Fume Hoods
Free specification and pricing. Call (801) 855-8560.