I use these type of heaters in a vacation home. I put them on wall timers and cycle them on and off as needed. They are very fire safe and do not require any venting. The down side is they take awhile to heat up a room.
https://www.walmart.com/ip/Costway-1500W-Electric-Oil-Filled-Radiator-Space-Heater-7-Fin-Thermostat-Room-Radiant/898737407