I'll give it a go! maybe U's could add to the list and get to 15 violations? This could be fun
1) No furnace shut off switch, pluged into a wall recetacle, can't trell for sure?
2) Furnace circuit wiring not in conduit to ceiling
3) Flex gas line to furnace has no tag, is it UL approved?
4) Gas flex line enters furnace, connection should be on the outside before entering furnace?
5) Gas shutoff valves?
6) Can't tell but the fuel pipes may not have enough clearance to combustibles or the FJ may need a metal shield
7) Plate cover missing on the wall left of the furnace
8) Water heater pan drain needs to terminate properly to floor drain or air gap or o/s
9) WH PRV discharge pipe may be considered to close to the pan?
10) Water heater cold water valve
11) Do you require any protection for the furnace and water heater from vehicular damage?
12) OSB wall sheeting?
13) Where's that water heater flue going?
What's up with that nasty insulation job?
Don't ask for code sections, taking a nap!