Anyone Self-Installed 2nd A/C?

[Wally15]

Seriously considering putting a 2nd a/c in the MBR of my '13 Laredo 308RE. Already has the wiring and the vent. Closest reliable RV maintenance/install shop is 2 hours away. I have a nice shop crane that can put the 110# unit on the roof. Doesn't look that difficult to install after reading the literature. A little worried about seal alignment and a potential leak source.
Anyone done a self install a/c? Any problems or surprises? Any opinions on pros and cons of self-install? Any protection required to work/stand on roof membrane? Rough guess is I can save about $150. That's a full tank of diesel!
My 15K main a/c is ducted to floor vents. I'm assuming the ductwork does not extend to the MBR roof, so I'm planning to purchase a 13.5K ductless model. Thought I'd add a heating element to the air distribution box for backup. I will have to do this mod in the driveway.

[tightline]

This is a very easy install. The hard part is getting the unit on the roof. It will take you longer to remove the vent in the roof an clean the roof than it will to install the ac. After the clean up I just put a blanket on the roof with a thin sheet of plywood to protect the roof set the unit on the roof then two people to pick it up an set it over the hole you are finished on the roof . Inside may take 30 min. When I shopping for a AC I did find that some are sold kits an some are three parts outside unit,inside unit an gastet the one I got was a kit the gasket was fasten to the unit. My installed took less time than your two hour drive will. Good Luck .

[jje1960]

I did ours prior to the 2013 season, hardest part is getting it on the roof. I ended up having a neighbor assist, we pushed / pulled up sliding on a ladder. Read and re-read the instructions prior to starting, it's important to understand the process, not just follow the directions. Ours sealed just fine. Be careful to not over tighten the 4 long shoulder bolts that actually hold the unit down, ours was tight well before the recommended torque settings.

[WaltBennett]

Haven't added a second one, but I replaced a broken on on a TT I had years ago. Like everyone's said, the worst part is getting it up onto the roof. The rest is easy if you just follow the directions.

[jtyphoid]

Don't forget foil HVAC tape to seal things up so that you don't lose conditioned air into the ceiling cavity.

[hankpage]

If you are handy and have the tools (especially that crane) you can do a better job than any RV tech. Just because it's yours and you care. Most dealers service rates are over $100 per hour so I am sure you will save more than your estimated $150 and know that it was done right. You will be done long before you could have driven to the dealer and back. Take photos while doing it and let us see the project completed.

[JoeofNSB]

I used a long extension ladder and a slide plate made out of plywood with a good rope to pull the unit up onto my Raptor. Worked very well, safe and nothing got dropped.