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Replacig old fan is ruled out as we do not want to take risk of implosion We are planning for new duct and new fan for additional equipment. Please advise what is max flowrate a 22" x 10" MS duct can handle ? Thanks

Let me clarify There is existing duct for a kitchen which is operational and carrying 6300 CFM. We have plans to install new equipment which would require 7000 CFM to extract ( earlier it was 9000 which is now changed) The operational duct size is fixed and I asking for the design for a new...

I have all calculated flow rates amd mow i require to design fire rated ( MS) duct for this flow, Existing is 6300 CFM DUct and exhaust is in place New 7000 CFM to be designed . Please suggest a suitable dimension ( rectangular) for this flow rate . Material is Mild Steel

Yes that was typo You are right, cannot go beyond 12m/sec. Hence trying to find a space to lay new duct , However, the space is very less and hence duct has to be designed to extract 9000 CFM . Any suggestions, what could be possible diamensions of rectangular duct and constrcution class of...

@LittleInch . These dimensions are in Inches and not feet. Thanks

Anyone who cane help me designing an exhaust duct to be connected with kitchen hoods, I can share details if someone can help asspace is very limited and narrow

Thanks IS there any software tool which is available to design a duct for exhaust for a commercial kitchen>

Thanks Surely these details will have to be checked . Just to let you know that the exhaust duct is 47' x 8' and then before fan it is 28 ' x 23'. would it be suggestable to increase size of the later part of duct to facilitate additional flow?

Thanks SAK9 The construction material is heavy duty GI . But i need to ensure that if the capacity is increased from 6300 CFM to 9000 CFM, will this duct suffice Regards

Hi I am looking for design tips for a modication of commercial kitchen exhaust system . Without changing current duct , would like to know if more equipment can be added to extract smoke by enhancing exhaust fan. This means: Keeping existing GI Rectangulatr duct as it is( Since there is no...