Another Fisher and Paykell here.
In our rig, depth was critical because our refer sits next to the already narrow doorway to the bathroom/bedroom. We looked at the Samsung rf18 and there's no way it would have fit depth wise or height wise. For many other rigs depth isn't as critical. Here's a link to the thread where I replied with a description and photos of my install. You'll see why depth with handles was critical:
https://www.irv2.com/forums/f115/out...-386374-5.html
A few things to consider:
If considering this as a dyi, how handy are you?
Are you physically fit enough to wrestle with a couple of refrigerators in a confined space, through a narrow entry door and down steep steps?
What's under your existing refrigerator?
Will you be dry camping? If so, what's your battery situation?
Getting the old Norcold out, and the new one in, can be a challenge. If either won't fit through the door, a window or the windshield must be removed.
I was able to get the Norcold out the door AFTER stripping the cabinet of the doors and cooling unit. Still needed to remove the passenger seat. Had 1/4" of clearance to spare at the door opening. Phew! I removed the Norcold while my wife was at work and didn't tell her for a while that I got it stuck part way out the door. Fortunately there was no way I was going to still be there trapped inside the rig when she got home. Pride is a very strong motivator. I DID think my way out instead of resorting to brute force. When she got home and asked how it went I said: "Fine, no problems."
I lowered my refrigerator platform for convenience because my wife is fairly short and would have had difficulty reaching things at the back of the top shelf.
The F&P refrigerator is an inverter style cooling unit which means it's a DC compressor so it ran fine with my modified sine wave inverter. I did eventually swap the inverter out for a pure sine wave inverter though. Depending on how your refer outlet is wired, it either may or may not have power when running on the inverter. Mine did not. Luckily there was an outlet in the main compartment right under the refer that did, so that where I plugged in the new one.
Note, you'll need to plug the refer propane line before installing the new one, and if it has an ice maker, you'll need to plumb in water. Mine doesn't.
When doing preinstall measurement be sure to include the corner to corner measurement of the refrigerator box and compare it to your ceiling height. Remember, after getting the new refrigerator in the door you need to stand it up so this measurement is important.
Make sure your house batteries can run it overnight if you plan to dry camp.
There were several 2 door refrigerators that would have fit without any cabinet modifications. I insisted on a French door style because when the slide is in we wouldn't have been able to fully open a two door without hitting the opposing cabinet/counter.
We are very happy with our upgrade, especially my wife who was worried about propane refrigerator fires. The extra room is wonderful. My only complaint about the F&P unit is the crisper bins sit in a full width pull out drawer. This mean both doors must be opened to access either crisper bins.