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Thank you EnergyProfessional. I am not really creating a newly founded firm though. I can't find a job in engineering (I have an employment gap) and know nothing about how these firms go about finding work. Talking with architects and contractors is a good idea thanks. I guess they would be...

California. I did email them but have not heard back.

Perfect, thanks

Is it legal for engineering firm to pay referral fees for business? I have an engineering license and am thinking of doing this. I am pretty sure lawyers are not allowed to offer or pay referral fees. Any ideas on where HVAC consulting engineering firms find their business? How do they find...

This does not seem like a plug and chug type problem. Start of with a basic diagram. If you draw a fan and motor inside the air stream, then a box around that to represent the system boundary, you can draw arrows indicating energy entering or leaving the system. Equate the arrows going in...

Thanks for the suggestions and link. I know the engineering fundamentals (I have an EIT and PE), but have been out of the business for awhile and have never designed a VAV system before so I thought I review some basics. I am reading that URL you posted energyprofessional which looks to be a...

Could anyone familiar with VAV design recommend a book basic guide that I could download or purchase? Something that starts with the basics and goes from there. Thank you

If you have a fan that is 60% efficient, 40% of the power is put into the air as sensible heat by increasing the temperature. Is this correct? What happens to the other 60% and is this power completly accounted for by the bernoulli equation? What are the 3 components of the bernoulli equation...

Thank you for your replies

The outlook for mechanical engineers in general https://www.bls.gov/ooh/architecture-and-engineering/mechanical-engineers.htm. Does anyone know of more detailed sources other than bls.gov? It would be useful to know specifically what the outlook is for mechanical engineers-hvac design. It...

Thank you, that answer sounds correct to me and also possibly explains why on some tables the enthalpy is shown as a negative number once you get below a certain temperature. On the tables I looked up the following 520 R (60F) ==> h =124.37 btu/lbm 545 R (85F) ==> h approx 130 btu/lbm delta...

Hi, I have uploaded two images. One is a table of Low Pressure Air Properties. The other is a typical psychrometric chart. If you look up the enthalpy of air at 60F (520 R) in the low pressure air table, you get an enthalpy of 127.27 btu/lbm. If you look up the enthalpy of air with zero...