Why are fume hoods so expensive?
–Many factors are considered when pricing a fume hood. Special features and add-ons will drastically drive the price up or down. For instance, a fume hood that will experience explosions compared to one that is used for spill containment, pricing will differ.
How efficient are fume hoods?
The design of the airfoil, corner posts, baffle, and bypass are critical to sustaining constant containment levels in a wide range of laboratory environments.” Standards-setting organizations (e.g. OSHA, California OSHA, NIOSH) recommend that fume hoods have a face velocity of about 100 linear feet per minute (FPM).
How long do fume hoods last?
Fume hood testing and inspection EH&S performs a functional performance test to assure hoods perform as required about every 18 months. The performance test typically includes an evaluation of the face velocity, the sound, containment, monitor performance and the tracking ability of a VAV (when applicable).
Which is the best use for a fume hood?
Laboratory Fume Hoods. A properly operating and correctly used fume hood can reduce or eliminate exposure to volatile liquids, dusts, and mists. It is advisable to use a laboratory hood when working with all hazardous substances.
When do you need to replace your fume hood?
Acids in a standard hood can cause an unsafe build-up of residue in the interior of the hood and the duct work. Replacing your fume hood may be necessary when you simply need more fume hood space. Consider these questions:
Can you put polycarbonate on a fume hood?
Hydrofluoric Acid etches glass, so using it in a standard hood over time will eventually require sash replacement. Polycarbonate can be installed on most fume hood types, as long as the liner material is compatible with Hydrofluoric Acid.
What can you use as a sash for a fume hood?
Polycarbonate is a substitute for a glass sash for situations that require working with Hydrofluoric Acid. Hydrofluoric Acid etches glass, so using it in a standard hood over time will eventually require sash replacement. Polycarbonate can be installed on most fume hood types, as long as the liner material is compatible with Hydrofluoric Acid.
Which is better a low or high air flow fume hood?
Many high performance models on the market today operate efficiently at a much lower air flow. These low air flow fume hoods can operate at as low as 60 fpm, compared to 100 or 150 fpm common in older models. Lower airflow means lower energy consumption and a lower cost of operation.