HVAC Clean Room Design

So what are you doing yapping on a forum? Get to work. Or do you have a specific question? If so, please post it because I don't know what you need from your one sentence request.

I suggest you turn that project over to an expert!

This should help you:

http://www.google.com/search?hl=en&ie=ISO-8859-1&q=+want+design+ISO+5+%28class+100%29+for+electronic+industry+for+that+what+will+be+the+supply+%26+return+duct+velocity.&btnG=Google+Search

What's your required volumetric flowrate? Without that, it's impossible to know your required duct size, fan etc.

To Guest;

You might get good answers if you would provide intended use, user requirements, size of working area, of course, your specs (class 100), number of personnel that will be expected in the area (full or part of the time), amount of equipment (to calc. BTU's), flow specs like mentioned by my other colleague, and generals like temp ranges, airlocks, windows, doos, movement, air changes required......................etc.