Recent content by humpy

Thank you very much, I will check it out.

Yes I am.

Existing facility. The client asked for the study to be done to comply with OSHA. I do not believe I will be involved in staff training or labeling, just the field investigation, one-line diagram and calculations. They are a chemical manufacturing company. I believe everything is 480v or less...

I would appreciate some recommendations for any good courses available in or near North Carolina. Thanks.

The building will be located in climate zone 7A. This will be a metal building insulated per energy code. There will not be a crane.

Thanks for the input. We don't have to sell the client on the floor heat but they wanted to know the cost comparison. I will check out those slab details. Thanks again.

I'm looking for a very rough estimate on the installed cost of hydronic radiant floor heating vs. overhead radiant tube heaters. The space is a tractor trailer truck garage of about 9000 sf. I understand there are many variables left out but need a rough estimate to give a client. Natural gas...

Thanks for the reply. This is a t-bar lay-in ceiling. The ceiling is useful to keep our water piping out of the attic. Good point though with substituting a higher drywall ceiling for the current arrangement. We could run the water under slab. I'll look into it. As with many jobs, function...

We are working on an office building with a pitched roof structure. Split air handlers will be in attic. Main trunks thru/between attic trusses. Branch ducts will run hard in the attic and punch between trusses and thru the insulation(batts)where a short length of flex will connect to our...

I've never used anything but Trace but would also like to know about other options. I would like a program that handles dx equipment. Trace takes a bit of manipulation to model dx.

Thanks for the info so far. Semco seems to have an extensive list of products. I will have to speak with them. We do use rectangular ductwork in exposed situations also. Usually it is held near the structure or between the structure and painted out black or whatever color they paint the steel...

Hello all, I am on the design side of HVAC building systems. We have more and more customers desiring exposed structure and hence exposed ductwork. I tell them there is a price premium involved with spiral duct and double-wall but i don't know what the number is. Does anyone know the average...

Thanks for the insight. We will look into power exhaust and /or gravity relief. I will try to post our results at a later date.

We have a constant volume hvac system utilizing package rooftop equipment with a supply fan, no return fan, and an economizer. When the unit was installed the barometric relief was missing(not installed). The unit is set up to supply a minimum amount of outside air for ventilation. The space is...

When we have a server room(closet) to cool in a small office and a mini-split is cost prohibitive we usually install a exhaust fan in the ceiling capable of 5+ ACH and a door grille low. Discharge to plenum or outdoors depending on your air balance. Heating or cooling, you are running 70 degree...