VENT FREE GAS LOG HEATER

Bought our first vent free gas log unit about 25 years ago. Jotul number 3 ( google it if you want ). It's a free standing cast iron stove. Wife just wasn't satisfied. She wanted a real fireplace with mantel. So after the daughter moved away we forfeited that bedroom closet to cut in a 32 inch wide fireplace in the living room wall. Still vent free propane. Either has been ran from sun up to sundown. With bedroom doors closed the center of the house stays toasty warm.
Only time we would run one at night was during a power failure ( like that big ice storm we had a few years back ). We slept in here by it. We even used them for cooking. On top the cast iron stove was easy enough. Cooking in the fireplace wasn't so easy. Ceramic logs out, bricks and a grille grate in. Far as we can tell, its not killing us quicker than anything else. Dying to find out LOL
Because I have electric heat, used at night when its coldest, Propane heats about 750 sq. ft. 10 or 12 hours per day, I can't compare gas usage. I'll say this, If we tried to stay so toasty warm with the electric heat, the power bill would bankrupt us.