Greg
I have the older pre splendid model which is vented, in my coach as mentioned earlier it works well but can only handle smaller loads and take longer to dry than a residential model because of the 120 volt heat element.
An average load would consist of what you are wearing.
It's also worth mentioning that these units use a lot of water to complete a full load ( in the 15 to 25 gallon) range depending on the number of rinse cycles.
We have learned over time that by limiting the number of rinse cycles from 5 to 3 by using the perm a press cycle for the wash and then use the normal wash final spin cycle to do a final high speed spin which works well.
Before the dry cycle it is important to take the clothes which will be stuck to the sides of the drum after the high speed final spin cycle and fluff them up as this allows the air to flow around and through them better and makes them dry faster and better
I believe half the complaints about slow drying on the vented models are because the clothes are in a mated state stuck to the sides of the drum.
As mentioned by others AVOID a non vented unit as they use a condensing system to dry the clothes. This system uses even more water to create steam to dry the clothes and take for ever to dry.
And as mentioned earlier take the time to install a drip pan under the unit to collect any spillage and keep it out of the coach floor
On my unit I installed a drip pan and drain pipe to the out side so if there is a leak the water is dump outside.
Like the one below as dryer vent
https://www.rvupgradestore.com/DrainAWay-Pans-p/72-4873.htmhttps://www.campingworld.com/splendide-dryer-vent-kit---chrome-plated-48677.htmlWhen installing your dryer vent it is best to get a straight run from the machine to the out side wall as there is very little space between the machine and the wall ( 4 to 6) tops and a turn on the vent hose will be hard to deal with and cause a restriction in the flow ( a bad thing ).
I see others have given dimensions to install the vent just measure to make sure it will be in the right spot for your machine to align with.
Hope this helps
Eric