Besides providing a highly improved safety device to the researcher, and saving the owner considerably more energy than a VAV system, the following is a list of some of the other benefits of this new breakthrough technology:

1. The 70% first cost savings in the mechanical system design literally makes the fume hoods free.

2. The operational energy cost savings afforded by the VFV fume hood is equivalent
to operating a VAV fume hood with the sash closed all the time.

3. Hourly air change rates are reduced to a level that matches the normal cooling demands.
Space temperature conditions are improved and worker complaints are eliminated.

4. To achieve the energy savings promised with VAV systems, sashes must be closed and complicated controls must function at all times. VFV requires no user interface, fume hood sashes can be in
any position and it is based on simple and dependable constant volume control.
VFV eliminates risky diversity factor designs.

5. VFV fume hoods require 1/4 the amount of static pressure of conventional fume hoods
which translates into the quietest fume hoods available.

6. A standard 6' VAV fume hood requires a 12" connection, while the
VFV bi-stable vortex fume hood requires only a 10" connection.

7. Mechanical space can be reduced by at least 50%, which improves the net to gross area efficiencies.
The smaller amount of mechanical equipment translates into lower supporting structural members
and costs.

8. The VFV fume hood controls and alarm system are factory installed, prewired, and commissioned
with an exhaust manual balancing damper and single source responsibility. The VAV system,
however, is field installed, wired, and commissioned with multiple source responsibility.

9. Constant volume systems are easier to balance and commission
than the elaborate variable volume systems presently employed.

10. The VFV fume hood alarm monitors fume hood performance by monitoring the strength of the
bi-stable vortex. It's like equipping every fume hood with a tracer gas test operating on a continual basis. This is a priceless feature for fume hood users and their families.

11. Easy access for mainentance purposes.

- Lights are able to be serviced from the front of the Vortex II.

- Services are extended to the top the Vortex II for easy installation and maintenance.

- All the services valves and electrical outlets are accessable through the front of the Vortex II.
The removable the face plates make it easier to access the services on the Vortex II, whether it be, maintenance or the addition of new services.

(The removable front access panels that expose the services in the Vortex II
diminishes the need to tear down a fume hood in order to gain access to its services.)

12. The industrial quality counter balance weights and sheaves are in the front. Why? All maintenance items are in the front. This is the only fume hood where the lights, cables, power, controls are accessible without crawling over the ceiling. All other fume hoods must be totally removed by disconnecting all plumbing, ductwork and power, just to repair the cable/weight system.
13. Fume Hoods are manufactured using angle, unistrut construction. The liner is used to make the fume hood square. This construction method was marginally acceptable when the liner was made from asbestos, but not now when the liner is made from resin. The fume hood manufacturers only talk about flame spread, but never burn through! Factory mutual (FM) tests fume hoods for destruction and only our hood remains standing after testing. Why? Our fume hood is the only one made where the liner is backed by steel! All fume hoods should be made this way to protect the facility, worker and laboratory design professional. However, we are the only ones to do it right!
14. Combination Sash (Horizontal + Vertical) Why? The horizontal sash provides the worker the ultimate in safety. The horizontal window is like providing side shields to safety glasses! The window can be positioned to be a full body shield and horizontal operation is less susceptible to walkby disturbances. The horizontal sash allows the taller and shorter worker full access to the fume hood without fully opening the vertical window. The laboratory design professional has no way of knowing what will be used within the lifetime of the fume hoods. If the user chooses to use vertical windows, they can, but then the user takes the risks not the laboratory design professional.

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