most efficient space heater

Portable Oscillating Fan Heater with Thermostat

Optimus Portable Oscillation Ceramic Heater w/ Thermostat & LED

Lasko - Electric - Ceramic - Tower Heater - 150 sq ft.

Optimus Portable 360 Surround Ceramic Heater w/ Thermostat

JIONJOY 26" Electric Fireplace Heater - Freestanding Stove with 3D Flame Effect

GDFStudio Rabun Portable Electric Fireplace Stove with Adjustable Heat

ZAFRO Electric Fireplace Log Set Heater, 21" Vintage Design Portable Freestanding Fireplace Log Heater,Realistic Flames,Realistic Ember Bed for Home

Optimus Electric "Flame Effect" Mini Fireplace Heater

Amana 6000 BTU Window Mounted Air Conditioner and Dehumidifier: Programmable Timer, Remote, 3 Speeds, 200-500 sq. ft.

SereneLife Electric Fireplace Heater with LED Flame & Log Effects - SLFPE29WBK.5

White Rodgers Heating and Cooling Push Buttons Single Pole Thermostat

DR. INFRARED HEATER DR-999 Portable Infrared Space Heater with Nightstand Design, Furniture-Grade Cabinet, Remote Control, 1500W, Cherry

Costway 27'' Freestanding Electric Fireplace Heater w/ 3-Level Flame Thermostat

Portable Utility Heater with Thermostat-Full Size

CLIHOME 17" Freestanding Electric Fireplace, Panoramic 3-sided Vew Stove Heater With 3D Flame Effect

GDFStudio Michelle Portable Electric Fireplace Stove with Adjustable Heat

17" Freestanding Electric Fireplace Stove, Fire Place Heater with Realistic Logs and Flame Effect and Overheat Protection

Portable Fan Forced Radiant Heater with Thermostat

Heat Storm 1000W A-1000-WXG Deluxe Indoor Infrared Wall Heater Gray

Milex 360 Steam Mop ( Green )

ZAFRO Electric Fireplace Log Set Heater, 21" Vintage Design Portable Freestanding Fireplace Log Heater, Realistic Flames, Overheated Protection