The TAB is just in place to get the system to meet the design. In my experience doing building inspections, facility management will change everything around with no regard for code or design conditions.
Why does the minimum need changed does it not meet the ventilation requirement? If it was...
Your load calculation should include latent load added by people. If you have some equipment/process in the space that produces a large latent load that needs to be captured in your calculation. Select equipment that can meet your loads and in most standard cases sensible load is dictating.
On...
If the system is existing just go on Amazon and buy a $15 anemometer and measure the airflow. If you have one outlet measure the feet per minute discharge velocity. Then multiply by the duct area in square feet to determine the actual CFM.
As pierreick mentioned the dust could be explosive. You may be required to install a dust collection system to mitigate that hazard. If a dust collection system is required you may need to supply a make up air until. Almost any equipment could work if you meet your loads and flows.
1) You would utilize the economizer in that situation. The heat coil would activate when you are bringing in the minimum required outdoor air and your leaving air temperature is below desired.
2)The preheat coil is utilized to raise outdoor air above freezing in hydronic units. In a cold...
I never went on site the lead went and took a few pictures that did not allow me much to reference. This site is in Tennessee.
I do have a lot of field experience because I did building inspections for military hospitals across the US for three years. So, I have a good grasp on what to expect...
Ultimately, I do not see this project as up for debate because my lead stamped it so that is his issue. I am just trying to use this as an example to learn best practices.
I utilized Trane Trace for my load calcs, and I was generous with the internal load allotments. One of the less than 100SF...
I am not concerned with getting a solution to this older project, but was using it as an example.
My question is generally what would you do in a situation where you have to replace an existing VAV AHU system with over twice the required capacity?
Is it acceptable to replace with same capacity...
My lead does not has much experience, and I am not confident with some of the stuff he says. On this instance he said he ran a calculation and it was very low so he just wanted to defer to what was existing.
It seems like installing equipment more than double the necessary load does not follow...
Hello, I have not been in the industry very long and wanted some feedback on a design that took place at work.
We had about a 9,000 SF single floor office building in Tennessee with no major loads. The original equipment was a 24,000 CFM AHU and a 60-ton air-cooled chiller. The client wanted to...
