Air Fryers are great! They are amazingly versatile, especially the ones shaped like toaster ovens that can also bake, toast, heat, broil, etc.
The ovens that come with most RV's aren't so great. We tried to use ours several times and gave up. It took forever to heat up, would never get much above 350 degrees, and was too small to do much. We haven't used it for anything but storage for a few frying pans for years.
Several posts on this forum have recently showed installing Air Fryers in various places around the RV. In our 5th Wheel we tried just keeping one on the counter but we all know how much counter space RV's have - so no - that's didn't work well at all.
I discovered a brand/model of Air Fryer that I thought would fit perfectly in the space normally used for the Oven. The PowerXL available from Amazon or Walmart (I picked mine up from Walmart).
First step was to remove the Atwood stove/oven combination. Take the grill off, push the top to the back and lift it off, remove four screws from the sides, disconnect the gas (remember to turn it off at the tanks first), and lift the thing right out. I had examined mine to see if the stove and oven could be separated and decided that was too much modification - especially of the gas plumbing. Look at your stove combination brand to see if it can be separated easily.
I chose to buy this one as a replacement:
https://www.amazon.com/dp/B09GCNNBMR
I chose it because it's flush with the counter top and has a built in glass cover. So far I like it.
Next I had to box in the space under the stove where the oven used to be. I had a bunch of scrap lumber in my shop so that influenced what I used.
First I ripped some 2X4's on my table saw into 1X1s. You want to keep things light in an RV.
I used these to frame out the "box" under the stove. I didn't take photos of this step because it's going to differ greatly depending on the cabinet you're modifying. Basically I ran three 1X1s from the floor to the bottom of the counter top along each side (six in all). I used metal L brackets to attach the top and bottom of the middle 1X1's to the floor and counter top respectively. The front and back 1X1s attached to the front wall and back wall of the cabinet with glue and screws (pick your screw length carefully!). Next I screwed 1X1s horizontally making a box where I wanted the "floor".
In this picture you can see the walls and floor of the cabinet. To make the walls I took 1/8in hardboard (like pegboard but without the holes!) and glued and screwed it to the 1X1's using flat head wood screws that would pull down tight and flush.
Next I glued aluminum sheets to the hardboard with rubber cement. You paint the cement on both the hardboard and aluminum, let it dry a minute and apply - make sure you get it positioned right because you won't move it once it touches :-)!
It turns out that I needed 3 pieces of 12in X 24in aluminum and Home Depot sells that precut and polished!
https://www.homedepot.com/p/24-in-x-12-in-Sheet-Metal-0-025-in-T-Polished-Aluminum-800697/204373306
I used the aluminum both to make the compartment easy to clean and to reflect heat. The Air Fryer doesn't get all that hot on the outside - probably not as hot as the traditional oven that it replaced but I just like the idea of metal walls.
You'll also notice the AC outlet I added to the back of the compartment. Since my Electrical panel is just below this - it was really easy to add a breaker to the box and I have a dedicated 15a outlet.
Speaking of heat, the stove I purchased has a vent in the back.
This photo is a bit weird, but you're looking UP at the bottom of the back of the stove. Notice the vents that will allow any heat the Air Fryer does create to vent out of the compartment. Also, I framed this compartment up so there is a minimum of 4 inches between the outside cabinet of the Air Fryer and the walls of the cabinet. This will allow sufficient airflow around the cabinet.
And here's how the final install looks:
I always forget that this forum software won't handle vertical photos! Sorry about that - just turn your head sideways :-).
The dimensions of the PowerXL are almost PERFECT for this enclosure.
Now, you ask, how do you keep it from sliding around during transit - yet make it easy to remove?
Coduit clamps to wrap around the plastic legs and hold them against the front edge of the cabinet!
You'll also notice some holes and scaring to the wood caused by the bottom of the old oven - I tried staining these but not sure what else I'm going to do - they don't show much when the Air Fryer is in place.
Questions - just ask!