most efficient space heater

Dreo 1500W Atom Core Portable Oscillating Ceramic Space Heater for Home with Remote and Thermostat 1-12H Timer Silver: Indoor Heater for Bedroom

Honeywell Slim Ceramic Tower Heater Black

R.W.FLAME Portable Electric Tabletop Space Heater Space Heater, quiet, Overheat Protection for Home/Office, SILVER

DREO 1500W Atom 416 10" Whisper-Quiet Portable Ceramic Space Heater with Temp Control and ECO Mode Timer with Remote Non-oscillating

BLACK+DECKER Personal Ceramic Indoor Heater Black

Honeywell UberHeat 5 Ceramic Heater White: Portable Electric Indoor Heater, Adjustable Thermostat, 1500W, ETL Listed

Honeywell HHF360B 1500W 360˚ Surround Indoor Heater Black: Portable Space Heater for Bedroom, ETL Listed, Fan Driven

BLACK+DECKER Ceramic Tower Heater: Indoor Electric Space Heater for Bedroom, Oscillating Fan, Adjustable Thermostat, 1500W

Honeywell Digital Ceramic Compact Tower Heater Black: Indoor Space Heater, Programmable Thermostat, 1500W, Electric

Costway 1500W Portable Electric PTC Heater Swing Space Heater w/ 24H Timer &Thermostat

HEATDAZ Smart Space Heater, 1500W Electric Heater with Wi-Fi & Voice Control, Portable Heaters with Thermostat for Indoor Office Bedroom Home

Costway 1500W Electric Space Heater PTC Fast Heating Ceramic Heater 3D Realistic Flame

BLACK+DECKER Oscillating Ceramic Desktop Heater with Remote, 1500W, Adjustable Thermostat, Fan Only and 2 Heat Settings, BHTC650R, Black

Costway Portable Oscillating PTC Ceramic Space Heater 1500W LED 12H Timer Remote Control

Good Housekeeping Oscillating Ceramic Tower Space Heater with Remote, 30", Black

LifeSmart LifePro 1500 Watt Portable Electric Infrared Quartz Space Heater for Indoor Use with 6 Heating Elements, Wheels, and Remote, Brown Oak Wood

Kismile Electric Space Heater, Portable Heaters for Indoor Use, Engineered for Small Rooms, with Handle, Dual Heating modes 750W/1500W

Costway 1500W Electric Space Heater PTC Fast Heating Ceramic Heater 3D Realistic Flame Black

Kismile Electric Space Heater, Portable Heaters for Indoor Use, Engineered for Small Rooms or Offices, Dual Heating modes 750W/1500W

Lasko Ultra Ceramic Tower Heater: Indoor Space Heater with Remote, Adjustable Thermostat, 1500W, Black, ETL Listed

DREO 1500W Solaris Max 25" Ceramic Space Heater Oscillating Fast Heat and Ultra-Quiet ECO Mode Remote

LifeSmart 1500 Watt Portable Electric Infrared Quartz Space Heater for Indoor Use with 4 Heating Elements and Remote Control, Black

Comfort Glow® CEH625 1,500-Watt-Max Portable Oscillating Ceramic Fan Tower Heater with Thermostat, Black

Dayton 48" Electric Baseboard Heater, White, 1000W, 120V 3UG78

Optimus 18 in. Oscillating Tower Heater with Thermostat

R.W.FLAME Electric Firplace Heater, Infrared Heaters with Remote Control and 3D Flame Effect and Heating Mode, Overheating Safe

Lasko CT22495 22" Ceramic Tower Heater with Remote Control

DREO 1500W Atom 416 10" Whisper-Quiet Portable Ceramic Space Heater with Temp Control and ECO Mode Timer with Remote Non-oscillating

Mydepot Space Heater for Indoor Use, 1500W Electric Heater with Oscillation, Quiet for Bedroom, Office

SUGIFT 26" 1500W Electric Portable Oscillating Ceramic Space Heater with Digital Display, White

SUGIFT 1500W 26" Ceramic Space Heater with Remote, White

1500W Space Heater with 3 Modes, Adjustable Thermostat & Safety Overheat/Tip-Over Protection for Home Office Use