RE: Commercial service tools
Tachometer, belt tension gauge, rigging equipment, crane hand signal training, other appropriate safety training for heights, hearing protection, a water key, several hundred feet of hose, cold weather gear (no heats are on frozen rooftops, not in conditioned basements), ladder tie-off equipment, a good headlamp for service work above T-bar, several different length ladders (if my van had space, I’d have a 28′ or 32′ extension and 10′, 8′ and 6′ A-frame. I just have an adjustable A frame and a 28′ extension right now). Sunglasses (rooftops are bright), at least 150′ of extension cord, a good portable shop vac, larger pipe wrenches, a good pry bar, 3/8″-1/2″ nut drivers, open head / ratchet combo wrenches, arc flash training and PPE, LOTO (lock out tag out) kit and training, a propane/mapgas torch and appropriate soft solder and flux, a larger brazing torch tip for larger pipe sizes, a thermal camera (not required but nice), a larger bearing puller for larger shaft sizes, a dial indicator, a refractometer, a transfer pump, a water pressure gauge (hose connection), several female x female hoses (like a washing machine hose), a hole saw kit, a fish tape, cheater bars, combustion analyzer (these are important for residential, but even more important for commercial), good digital dual port manometer, fine tip thermostat screwdriver for small control terminals.
I’m sure there’s more, but that’ll be my contribution to the list.