Bought a Waeco CF-35 secondhand 11 years ago, the previous owner had it for 10years before me.
The unit has operated as expected every time
Have never had a fault with it, even when i did flood it with the garden hose once while cleaning it post trip... A quick dry out and operated good as new.
The CF-35 is very friendly on power consumption
I can run it for 3 days in 38 degree heat, and not run a 100Ah batter below 50% SoC.
This is while camped with no charging of any kind taking place.

The old CF i have doesn't a temp set point, but rather it has 6 settings.
It is light, very handy when moving to and from multiple vehicles
The only downside, is this model doesn't have the built in 240volt adapter so you must use a external transformer ...Read more