On May 30, 8:51*am, "
wrote:

Code says metal eletrical conduit can't touch
metal HVAC ducts or any other metal

Nitrogen is recovered from an HVAC system

To address point number 1:

Yes, that is code in the four states in New England that I have done
repair work in...

To address point number 2:

Nothing may be vented to the atmosphere when doing any sort
of HVAC work in Massachusetts or Rhode Island... Nothing...
So if Nitrogen is charged in a coil during shipment to prevent
damage, it must be recovered prior to the pressure test and
the refrigerant being charged into the system...

Next fallacy ?

Maybe that explains a lot of the NY attitude -- too many
pollutants in the air...

~~ Evan