We have a dual duct HVAC system in our plant. A problem we are having is that one of the mixing boxes is not "mixing" the air. The ductwork is configuered in a way in which it branches right after it leaves the mixing box. What we beleive is happening is that cold air is shooting...
How can one support air duct about 15 ft. down from the roof. Will trapeze type supports work or is the distance too great? The duct will run above existing lay-in ceiling. Any recommendations? Thanks
Could someone please tell me if this is correct:
Appliance BTUh = 72000
Natural gas BTU/CF= 1025
72000/1025= 70.2 CF/hr
at 8 psi inlet pressure
Pipe size of 1 inch is fine correct.
What is the typical natural gas flow rate required for a 3 ton rooftop unit. Do these units usually have the capability of regulating flow (not pressure) on their own or does one need to supply a flow regulator
Im looking at using A325M high strength bolts. My question is, do different steel react with one another in a defective manner. For example one type for the beams and one for the bolts. Also is it standard practice to bolt beams together at the flange. Thanks