Ventilation for Science Lab.
Ventilation for Science Lab.
(OP)
In school science labs chemicals are stored for use in later school activities. What are the requirements for ventilating the chemical storage room. We have an acid storage cabinet, a flammable storage cabinet, and nitric acid stored in a container in a wooden cupboard. We can vent all the cabinets directly to the room and then exhaust the room or we can exhaust each of the cabinets separately directly to outside. The amounts of chemicals are small possibly largest being 5 liters.
What is best solution for venting the room. Does the fan and electrical in room need to be explosion proof.?
What is best solution for venting the room. Does the fan and electrical in room need to be explosion proof.?





RE: Ventilation for Science Lab.
RE: Ventilation for Science Lab.
4.3.4.4.2* Ventilation requirements shall be confirmed by one of the following procedures:
(1) Calculations based on the anticipated fugitive emissions. (See Annex F for calculation methods.)
(2) Sampling of the actual vapor concentration under normal operating conditions. The sampling shall be conducted at a distance of 1.5 m (5 ft) radius from each potential vapor source extending to or toward the bottom and the top of the enclosed storage area. The vapor concentration used to determine the required ventilation rate shall be the highest measured concentration during the sampling procedure.
(3) Ventilation at a rate of not less than 0.3 m3/min of exhaust air for each m2 of solid floor area (1 cfm/ft2).
RE: Ventilation for Science Lab.
RE: Ventilation for Science Lab.