HVAC system

Please perform a search of CR4 for HVAC, air conditioning, etc ..........

There is a lot more information that you would need to provide to get a decent response.

HVAC design is not as simple as it sounds, sure there are rules of thumbs, but .........

Also, please review this website for more of an insight into what you are asking.

If after reading previous posts, reviewing that website, and after providing the necessary information - please feel free to ask more specific questions.

Well, you'll need to design for the required temperature, which will determine the size of cooler/heater to use, required number of air changes per minute, which will determine your blower or fan size, and the required relative humidity (R_H) level, which will determine your dryer size. You may also need to take into account the maximum allowable particulate level, which will determine the type of air filter to use, as well as the pressure drop. Furthermore, the type of application will also determine the room air pressure. Electronic clean rooms require positive air pressure (higher than ambient) to keep dust out, while microbiological laboratories will require negative air pressure (lower than ambient) to prevent the escape of microbes.

Temperature and R_H are inter-related; if you're drying the air to the required R_H level at ambient temperature then cooling it down to the required temperature, you'll need to refer to a psychrometric chart because you'll need to dry your air to well below required R_H level before cooling it so as to achieve the desired level. Conversely, if you're drying the air at ambient temperature first, then heating it, you'll need to set the R_H level much higher than is required so that it will drop to the correct level when the air is heated.

All in all, unless you're a HVAC specialist (I'm not, but I do have some experience in it), the best thing to do is to engage a specialist to design the system for you.