We have a project that use an indoor condenser. The intake and discharge are ducted to a Building Louver. They share the same louver. The intake and discharge duct are 1 foot apart, edge to edge. Do you need to separate the ducts? If so, how many feet?
What's the load calculation rule of thumb for a restaurant space? For example in a residential building, it's 30 BTU/SF or 1 CFM/SF. The location is in New Jersey.
Can you install a 90% Gas Furnace in an unconditioned attic? We are a Mechanical Contractor and plan to install a 90% Gas Furnace in the attic for a Townhouse project. My questions are:
1. Freezing an issue? condensation from the furnace.
2. Would there will be a Gas Furnace performance issue...
I'm trying to select linear diffuser for a lobby area. I have a choice of 1-slot or 2-slot. The linear diffusers are to be located at the perimeter of the space. Do I need to select 2-slot, one for vertical airflow direction, one for horizontal direction? Or 1-slot linear diffuser good enough...
In a VRV multi-zone split systems, how do you calculate the additional refrigerant if required? For instance, the developed refrigerant piping is very long, let's say 300 feet.
If you want to go Air-cooled Chiller and the cooling load is 91 tons. What would happen if you select a 90-ton Chiller? Or you have to go to next size, let's say 100-ton Chiller. That's if you're using just one Chiller for the 90 tons load.
We have RTU's with Gas Heat and a significant gas piping to the RTU's are exposed. Do we need to insulate or weatherproof the piping like we need to weatherproof the exposed ductwork?
I think that thermal insulation is used primarily to maintain the supply air temperature and condensation second. Duct Lining is for sound attenutation. I often heard co-workers saying that if the duct is lined, it doesn't need to be insulated because the liner takes care of the condensation. I...
I wanted to know if do you need to be a P.E. to design HVAC or do a load calculation? Or does your work or design needs to be stamped by a P.E.? I work for a Mechanical Contractor but we have no P.E. employee.
Thanks.
A Shell and Tube Heat Exchanger with Hot Side EWT 200F and LWT=180F. Another Shell and Tube Heat Exchanger with Hot Side EWT=300F and LWT=200F. Both with the same working pressure (150 psig) and other equipment specifications. The only difference are the EWT and LVT. Why is it that it's the Heat...
Anybody has some kind of Utilities Profile Detail that would show how deep the Utilities underground piping are? I'm running an 8"FP (Fire Protection) tapping from an existing 8" Water Main to the Building. On the way, it would cross a 60" Storm piping. So I would like to show how deep the Storm...
Anybody have this book by Dr. Alfred Steele? I found it at ASPE website but it doesn't give you the table of contents. Anybody know the table of contents?
Thanks.
Guys, I'm looking for a Plumbing Manual book like the one equivalent to HVAC's Trane Air Conditioning Manual. Also is their an analysis software the Plumbing industry using like the one that the HVAC's Trace 700 (Trace) or HAP (Carrier) software?
What's going on guys? Can anybody tell me what article in the NEC can I find about conditions like these:
1. you could locate your panel only a maximum of 10 ft. from the transformer if your panel is MLO.
2. if you put an OCPD in the secondary side of the transformer, you can locate your panel...
Guys how you doing? I'm new here just sign up. I just want to know if core velocity is the same as free area velocity. The published performance data you get over the manufacturer's website is only core area and core velocity. Grilles will be used for transfer air between rooms (clean room) at...
