It is not inexpensive.
Convert rv propane furnace to electric.
The parts used for this rv heating mod.
In this design 2 were used.
This worked well as propane also was used for the hot water heater as an additional fuel for the refrigerator and for the furnace to heat the interior of the rv.
Here is a link to it.
Through the years propane gas has been the go to for rv cooking fuel.
That is nearly 41000 btu s or enough to heat a pretty darn large rv.
Rv electric induction or propane.
Pvc t necessary if you want more than 1 vent.
Flip the switch from gas to electric with a hybrid rv heater just like most modern rv water heaters can switch between electric and propane power as conditions warrant the cheapheat system can go between propane and electricity to heat your rv.
Furnace flex hose use excess if redirecting you will need to purchase additional if adding on.
Cheapheat is a hybrid rv heater unit that mounts directly downstream of your existing rv gas furnace.
But since then things have changed.
Sheet metal screws for fastening the vents.
There is an add on kit that can be retro fitted to an rv allowing the propane furnace to remain intact.
An electric rv furnace or portable heater is the most commonly used alternative.
Vents can use soffit vents or any other 2 3 vent design.
Which is the best cooking solution for you.
On a 50 amp rv 12000 watts would be available for heating.
To do so requires appliances with substantial power draws and the use of either a 50 amp system or a highly modified 30 amp system so appliances are not all attempting to drink from a 30 amp power cord at the same time.