Duct Design In School Gym
Duct Design In School Gym
(OP)
I currently have a HVAC company designing replacement HVAC units for a number a School gymnasiums. The problem is there is no duct work in the gym space, simple one or two supply and returns often located in close proximity. I am used to seeing a plenum or a grid of supply and returns. My concerns are poor air flow and noise caused by high velocity. Any comments?





RE: Duct Design In School Gym
RE: Duct Design In School Gym
Noise may be an issue, just make sure that the ducts are internally lined acoustically, that usually keeps the noise down. You can always ask to see some acoustic calculations to make sure the duct doesn't get too loud.
RE: Duct Design In School Gym
www.ellisconsultingengineers.com
RE: Duct Design In School Gym
That is woek which should not be done without licensed designer, contractor should not even do replacement if they do not have approach to original design, to be able to responsively confirm that they are replacing equipment with equal components.
If components are not equal, but substitutes, again licnesed designer is needed to confim it.
This is rather serious issue in my opinion. I am surprised that you are not concerned about liability.
RE: Duct Design In School Gym
RE: Duct Design In School Gym
RE: Duct Design In School Gym
Looks and works great. Good experience with use in gyms. See pics from website:
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***Get a licensed PE to design the system and replace the RTU's***
RE: Duct Design In School Gym
RE: Duct Design In School Gym
The original post stated that they are replacing the Units and that there is concern over the absence of ductwork in the gym spaces.
Also, galvanized sheet metal is obviously the standard. I was suggesting ductsox because they have been used in many gymnasiums with excellent feedback. Why should ductsox not be considered? Do you have information as to any negatives for the use of ductsox? If so, please let me know. Would be much appreciated.
It will of course be up to the owner / school district as to what the final choice of material used so why not have as many options (along with the positives and negatives associated) as possible to propose?
RE: Duct Design In School Gym
RE: Duct Design In School Gym
For the STR06 original post, ceiling fans have been popular and effective in these applications. I do agree with posts by others about air throw, low returns, and having a qualified designer.
RE: Duct Design In School Gym
A high level return is fine if you have good diffusion and only need heating in the space.
RE: Duct Design In School Gym
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RE: Duct Design In School Gym
Just like anything else, if it is designed and installed properly it works great.
RE: Duct Design In School Gym
RE: Duct Design In School Gym
NCPE, what if you use hospital grade liner? Closed cell vs fiberglass? I specify hospital grade liner all the time. Especially when the architect is too cheap to pay for an acoustical engineer.
If you use cieling fans (or destratification fans) which I suggest, use cages to protect them.
As Waramanga implied, Duct sox has next to zero throw, so only use them if you can get low returns (which is the optimum design)
knowledge is power
RE: Duct Design In School Gym
In an office setting, it is my belief that lined duct should not be specified either, due to the fact that the duct may be used for 30 years, and over that period of time, indoor air quality may suffer from particulates being sheared off of the liner.
Also, when existing lined duct is tapped into, the cutting of the liner causes particulate to become loose in the ductwork.
Brush up on applying sound attenuators and other such devices and you will eventually become familiar with and anticipate noise and its causes/propogation.