What you are dealing with is just an over priced electric heater with a fan and a dazzling revolving fire display light show.
You would probably get more heat from a built-in outside vented WAVE propane unit... These usually don't come with fans however

I liked the older DIMPLEX Electric fire place's in the house setup years back.
I have visited my sisters MONTANA 5th wheel setup with built-in fireplace and it sure kept the living room snug as can be in the mornings... Was definitely perfect for that...
Roy Ken