Don't take it for granted that the people building these things know what they are doing. My 2013, 3905 Voltage Toy Hauler nearly caught fire from the refrigerator chimney discharge.
My refrigerator is not equipped with through the roof vent, but rather an upper ventilation panel. Located inside this upper panel, the chimney vent is installed approximately 1 ¾ inches from a piece of wood panel that forms a cabinet on the other side. On top of the chimney pipe there is a metal chimney cap that diverts the flow of hot gases in two opposite directions. A “T” shaped cap. With the cap in place, the hot gases are now being released about 1 inch from the wood panel.
The wood panel shows significant signs of pyrolysis where the gases are discharged from the pipe. (Definition & Explanation of Pyrolysis
The link above describes Pyrolysis and why it should be addressed in installations of all chimneys regardless of size. I am a retired Fire Battalion Chief with 33 years experience and I can assure you, my RV was very close to catching fire and I am equally sure that it eventually would have but for my intervention. Pyrolysis is a process that may happen after several uses of the offending appliance or after several hundred but once the temperature is sufficient to alter the composition of the wood, IT WILL HAPPEN SOONER OR LATER!
If you have a similar situation, Take a look where the hot gases are being vented and make sure it's not turning any wood near the discharge black.