![]() ![]() Once your order is paid for, we will manually double check the online quote and reach out to you directly by email or phone within 1-2 business days. In order to expedite our quoting process we will be estimating the shipping to the best of our ability. Please note: Due to the weight, value or dimensions of this item, we are unable to provide an exact shipping quote online. For those who have a limited budget, the Series I is uniquely affordable. exhaust filter size, and building conditioned air losses. Ideal for "on the road" tissue culture or for use in small clean-room environments. The horizontal laminar airflow cabinet is best suited for maximal product protection. This unit comes with a scanned, 99.99% efficient 24 x 12 inch HEPA filter, fan, grounded plug and cord (cord and plug should be connected to the blower by a certified electrician), 7-ply maple housing, screws and steel handles. (round) pipe flow is ~2300 (but you have rectangular channels, could maybe pick the hydraulic diameter), and for a free jet I found a number of 1300, but take that with a grain of salt.Īll in all, you're back to gut feelings.FP's least expensive Laminar Flow Hood comes largely pre-assembled! All you need for final assembly is a screwdriver and a tube of silicone caulk. The problem is to find the critical Reynolds number that applies to your situation, which is not exactly standard.Ĭritical Re for e.g. The width of the fume hood? (But this is only ~one width long, so hardly counts as a "channel".) Do you pick the width at the end of the small channels in your filter? (but they are triangular/have a non-constant diameter, and flow through the walls to boot). The choice of length scale is important here. With this you get the flow velocity, and you can build a Reynolds number, and if this is higher than a critical number, you'll get turbulent flow. cfm) achieved is the same.Įverything hinges on the pressure loss across the filter (i guess pretty high) and the resulting volume flux of the whole system (depending on the characteristic/power of your fan). My guess/gut feeling is that (due to high pressure loss and flow through a porous medium) the air leaves the filter in a laminar fashion (even if it was turbulent before), so what kind of fan you use shouldn't matter if e.g. I think that such a deep filter will eliminate the need for a screen. Unidirectional, or Laminar air flow is pushed from the filter surface downward or in horizontal direction to maintain sterile. Would this be totally wrong? If so, is there a way to build the DIY flow hood to achieve a laminar flow using one of these inline centrifugal fans? 2- Laminar Flow Hood Function: The air entering a laminar flow hood from room is filtered through high-efficiency particulate air (HEPA) or ultra-low particulate air (ULPA) filters to exclude air particulate & dust. It seems to me that so long as the plenum is air tight besides the entry point(fan location) and exit point(HEPA filter), the plenum will achieve a static pressure (based upon the cfm of air driven by the fan and the resistance of the HEPA filter) and flow smoothly out of the HEPA. Its a very similar build, however this one has been built professionally. The argument is that the air pushed by these fans is turbulent and so will exit the HEPA filter in a turbulent fashion. Small Laminar Flow Hood Full build Check out this small laminar flow hood which has just become available on Amazon here (UK link here). The main question is whether these inline fans will produce laminar flow. The build for a laminar flow hood using these inline fans look, generally, like the two samples at the bottom of this link ( ). Many people are interested in using inline centrifugal fans because they are cheaper than squirrel blowers, more quiet, more energy efficient, and potentially more compact. It is generally accepted that a squirrel blower is effective at creating this laminar flow using the set up in the image posted above. So for years on the mycology, plant tissue culture, and DIY laboratory websites there has been this ongoing debate on how to achieve laminar flow in a home built laminar flow hood. ![]()
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