Utilizing "Sum of Peak Loads" will already over size your system. Depending on the number of spaces, exterior wall placements, space usage; peak loads will occur at differing times of the day. Lunch rooms would peak around noon, offices can peak anywhere between 1:00 and 4:00 typically...
MP, careful with the filters. When sizing a unit, you size the ESP, external static pressure. The filters are usually internal static pressure. ESP + ISP = TSP. ISP is internal to the unit (RTU, AHU...) and while you can get an idea, every manufacturer has a different number due to unit...
If exhausting properly to remove any added moisture to the room from the pool, the room would have the same RH as outside. Which means, on a very humid day, it will be very humid inside. This is a natatorium, calculate how much water is evaporated off the pool to determine the optimal flow...
If it's an occupied space, then code requires ventilation.
Code allows you to find the closest related space type to use. Also realize that code may not state a required ventilation rate, but an exhaust rate will be required. If you exhaust, you need to make-up, and that's how ventilation...
OK, dumb question here, but if you are exhausting 3000 cfm (assuming all dryers are on) and only supplying 1600 cfm, even with increasing OA, where is the rest of the room make-up air coming from (1400 cfm)? You stated that the waiting and laundry rooms are separated by a fire door, which means...
How is this pressure sensor to work? Wouldn't a differential pressure sensor (2 of them) work better? This way you could make the room negative in relation to the corridor.
Opening the door will always void a pressure setting, as now there's a big hole to allow air to pass. Now that being...
Review the mechanical code like trash said, specifically the ventilation section. Code doesn't require outside air to toilet and locker rooms, only exhaust. If the rooftop unit supplies as much or more outside air than is exhausted, what's the problem? If it supplies less, then increase the...
Looks like you don't have a heating air flow rate, just cooling is used to determine the airflow. Double check the heating load system as the heating coil on the terminal uni sizing data goes from -17.8 to -17.8. This would lead me to believe that this section is for the fan power and...
CHECK THE CODE!!!! Per IMC 10 ACH is not enough, 30 ACH minimum. Read the code, check out the IIAR standards.
Ammonia is not something to trifle with. Fix the leak, as this is probably contaminating the product in the freezer.
HVAC exhaust? Like toilet room air, or relief air? Either way I would assume the exhaust would be dependent upon the room air being exhausted. If the room is set to 21C then I would not assume 70C exhaust air.
The ventilation calculations have a very good hold on this question. 62MZCalc, while a little difficult to initially understand, does a fabulous job in illustrating the amount of outside air at the design condition. And the International codes follow the same path, with differing equations to...
Difference between Sum-of-Zone-Peaks, and System-Peak calculations here.
If done properly, the flow and load requirements when taken at each VAV box design should be more than the overall system size.
Think of it this way. A Zone facing East will have a maximum load during the morning, while...
Let me get this right. You need the unit to supply 2,000 cfm. You want to cycle some of the air back to the return of the unit. So lets say the unit needs to supply 3,000 cfm, so 1,000 cfm can be returned to the unit.
Your entering air temperature will be higher than ambient in the winter...
