I know whats missing but want to know if it is that obvious to everyone else.
LOL Well a flue pipe is a option isn’t it
How do you forget that!! 
that thing exhausts combustion gases into the attic?
Safety is sooo overrated!!
The attic is the same as the outdoors, right? :roll:
I kept looking at it and saying where’s the vent pipe,where’s the vent pipe
Good for you David in your thinking.
you were thinking correctly.
I take it there was no roof cap piping,
where this thing should have connected to? :roll:
All I could see was a hole cut out of the plywood sheathing, no exhaust roof vent cap installed. It had been covered over with the roofing material (concrete tile roof ). This house is in a large subdivision. One sub-contractor probable got ahead of another one and it got over looked ( dam contractors anyway 
). House is 7yrs. old and has been vacant for 8 mons.
Vacant for 8 months huh? I guess that is because the previous owners are dead.
Pretty obvious the flue was never connected but what about the safety pan I can not see in your pic did it have a drain connected or a 24 volt safety switch???
No Flue is pretty bad … :shock:
What about the small PVC pipes. The primary and secondary condensate pan stubs connect to one 3/4 PVC drain line (no trap or vent, and they shouldnt connect to the same drain line … :roll:). But what is that second 3/4 PVC line with the open 90 fitting for? Is that the installers attempt at providing combustion air? That would appear to be a line for the secondary stub, but it’s not tied in.
A few years back, I was performing a home warranty inspection. The gas furnace was venting into the attic as well. The builder did not want to address the issue at that time, I told the owner to turn off the furnace. The builder said it could wait until the next day. His justification was, “it is a well vented attic”.
I informed the builder we could call the local fire department and have their HazMat team take a look. He ended up changing his mind and brought out the HVAC sub to correct the issue right away.
Wow it surprises me you have t go such threats when it is people safety
Does that qualify the attic as “heated” space?