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SKU: 21503 UniFlow Conventional VAV Fume Hood with Explosion Proof Light 60" 21503

UniFlow Conventional VAV Fume Hood with Explosion Proof Light 60" 21503

UniFlow Conventional VAV Fume Hood with Explosion Proof Light 60" 21503

SKU: 21503

Vendor: Hemco
Part Number: 21503
Purchase UniFlow Conventional VAV Fume Hood with Explosion Proof Light 60" 21503

HEMCO UniFlow Conventional VAV Fume Hood with Explosion Proof Light 60" 21503

Click Here for a PDF About UniFlow Fume Hoods and Accessories Click Here for a PDF About UniFlow Conventional VAV Fume Hoods Click Here for a PDF for a HEMCO-UniFlow-PLAN-A-HOOD Work Sheet

The UniFlow 21503 Conventional Fume Hood maintains constant air volume through sash opening, when equipped with the optional VAV system, face velocity can be controlled to meet specific requirements. The UniFlow 21503 measures 60"x24.25"x59" WxDxH and explosion-proof vapor-proof light fixture Class I, Group C & D, Class II Group E, F & G electrical fixture installed but not wired, must be wired to comply with local codes. 115 volt, 60Hz AC. Switch not included.

Requires a remotely located exhaust blower.

UniFlow Conventional Fume Hoods VAV System Ensures Sufficient Airflow (Optional)

Maintain constant air exhaust volume at different sash openings while the face velocity varies at each sash opening. Closing the sash increases the the speed of incoming air, thus increasing face velocity.

The optional Variable Air Volume Control System constantly monitors face velocity and adjusts to a pre-set level regardless of sash position, ensuring sufficient air flow and maintaining volume to contain fumes even at
the near-closed sash positions. This system protects laboratory workers and reduces energy costs.

Complete Your Fume Hood Installation

Refer to HEMCO’s PLAN-A-HOOD to assist in the planning of your UNIFLOW Fume Hoods.

  • Ventilation Systems: Filters and Scrubbers
  • Variable Air Volume Controls (VAV)
    Systems allow fume hoods to reduce energy consumption while maintaining face velocity. The system operates by sensing actual face velocity and actuating a motorized damper or blower speed control to continuously adjust face velocity as sash is raised or lowered.
  • Ducting and Accessories
  • Airflow Monitors and Sash Stop
  • Plumbing and Electrical Services: Factory installed according to your exact specifications
  • Base Cabinets and Work surfaces


Specifications and Ordering Info
UniFlow Conventional/VAV Fume Hood with Vapor-Proof Light

Superstructure is unitized composite FRP fire corrosion resistant non-metallic construction. Integral fume chamber is seamless glass smooth with all coved corners with adjustable VaraFlow baffle system and bell shaped exhaust collar. Picture frame sash opening has counter balanced clear tempered safety glass sash with chemical resistant PVC framing, track and aerodynamic sash lift. Explosion-proof vapor-proof light fixture Class I, Group C & D, Class II Group E, F & G electrical fixture installed but not wired, must be wired to comply with local codes. 115 volt, 60Hz AC. Switch not included.

Requires a remotely located exhaust blower


Dimensions: WxDxH 60"x24.25"x59"

Horizontal Sliding Sash Option - Add suffix to catalog number.
Combination Sliding Sash Option - Add suffix to catalog number.
Factory installed to specified designated height. Also available for field installation.
AirFlow Monitor  
Continuously monitors face velocity airflow of fume hood. Select and calibrate at desired FPM velocity set point. If the hood face velocity falls below the set point, an audible alarm sounds and a visual red indicator light appears. Airflow alarm is factory installed or can be field installed. 115 volt 60Hz 51406
utilizes electronically actuated dampers within the ductwork to create and maintain optimal airflow. The VAV System includes the front mounted audio-visual alarm, electronic actuated damper controller and wall mounted sensor,transformer and calibration. Night set back, emergency air flow,mute of audible alarm, and self test mode are standard features of the unit.
Adjusts exhaust velocity by varying blower motor speed. The VAV System includes the front mounted audio-visual alarm, speed controller and wall mounted sensor, transformer and calibration. Night set back, emergency airflow, mute of audible alarm, and self test mode are standard features of the unit. 51408

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All returns must be authorized by Spectra Services in order to insure proper credit and must be requested within 30 days of purchase. All returns are subject to a minimum 15% restocking charge. For returns not due to error on behalf of Spectra Services, the customer is responsible for all transportation fees related to the returned product. To ensure proper credit, each product return must include the following information:

  • Customer name and address
  • Purchase order number
  • Spectra Services shipping order number
  • Date of invoice
  • Item number of returned item(s)
  • Spectra Services return authorization number (RMA)
  • Reason for return

Non-Returnable Goods
Unfortunately, Spectra Services is unable to accept the following returns at this time:

  • Products not in completely resalable condition (including products with damaged, missing, or defaced labeling or packaging
  • Chemicals, reagents, diagnostics, sterile, or any controlled products (unless products do not meet specification
  • Labroatory apparatus or instruments that have been used or are without the original packaging, labeling and operating manuals
  • Refrigerated products or other perishables
  • Products which are not inventoried by Spectra Services and are not able to be returned to the manufacturer
  • Products purchased on a special order
  • Products not purchased from Spectra Services
  • Products with an expired shelf life or an expiration date too short for resale
  • Discontinued products

Spectra Services reserves the right to review this policy on a case-by-case basis.

Pre-Owned Products

Upon receipt of the pre-owned product(s), the customer has one week to evaluate the product to ensure it meets their expectations. If for some reason the customer decides to return the product, they may do so at any point during those seven (7) days for a full refund. No restocking fee will be assessed, however, the customer is responsible for the return shipping costs. Full credit will be issued upon receipt and inspection of the item(s) to ensure equipment was returned in the same condition it was initially shipped out in.

Important Information

All exchanges and returns require the completion of a Return Merchandise Authorization (RMA) form. Once completed, please return the merchandise immediately as the RMA number is only active for ten (10) days from the date of issuance.

Charges associated with returning items are the responsibility of the customer unless the item(s) arrived defective, damaged, or incorrect.

Spectra Services highly recommends that return packages be insured for full value and packaged securely to prevent shipping damage.

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Our Address:
Spectra Services, Inc.
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Ontario, NY 14519 US
Phone: 800-955-7732
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