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I am replacing condensing and evaporator units for an existing -20°C freezer. It is >20 years old. We are not changing any of the walls/structure. Does anyone know what the procedure is to calculate the cooling load for an application like this?

Do codes require and exterior faucets/sill cocks on new buildings? Thanks

SA 6400 CFM EA 1650 CFM Pressure airflow into room 560 CFM RA 5310 CFM Another problem I am having is sizing the cooling. The space requirements are 68°F/<60% RH. The heat gain in the room is only 14,000 btu/hr very small. I will definitely have to reheat. What I am trying to do is provide a...

Thanks for the comments. It is a chilled water unit. It is also correct that the 560 comes from conditioned airlocks. I also have hot water reheat on volume control boxes. The boxes are constant volume for balancing, just for the air changes that remain the same.

I am designing a Pharma clean room. It requires 40 ACH or 6500 cfm. The only heat gain in the room is basically lights and people. There is 1650 cfm of exhaust required. It is negative pressure with respect to surrounding spaces so I am gaining approximately 560 cfm from pressure infiltration...

Hi All, I was wondering if any one out there has an HVAC designers checklist that they might want to share? Thanks