most efficient space heater

EconoHome Wall Mount Space Heater Panel with Thermostat, 600W Convection Heater for Rooms up to 200 Sq. Ft., 120V Electric Heater

HEATDAZ Space Heater, 1500W Electric Heater for Indoor Use, Desk Heater with Heating and Fan Modes with Thermostat AT-SH26

ZAFRO Small Electric Space Heater Ceramic Space Heater,Portable Heater Fan for Office with Adjustable Thermostat and Overheat Protection

EconoHome Electric Foot Warmer - Heater for Under the Desk, Office or Bedroom Energy Efficient Exclusive Overheat Protection Feet Warmer (50 Watts)

Handy Heater Instant Heat

EZ Heat Personal Ceramic Heater and Fan w/ 1,500W Adjustable Thermostat

Handy Heater Turbo Heat

EAGLE PEAK 1500W Indoor Heater with Thermostat, IPX 4 Splash-proof, Overheat Protection, Radiant Heating

ZAFRO Space Heater, Portable Heater Electric Ceramic Fan Small Heaters Handle Indoor Use,Child Lock,Tip-Over & Overheat Protection

ZAFRO Small Electric Space Heater Ceramic Space Heater,Portable Heater Fan for Office with Adjustable Thermostat and Overheat Protection

R.W.FLAME Portable Electric Space Heater, Small Ceramic Heater Fan with Thermostat, Overheat Protection,Fast Heating for Home/Office

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

R.W.FLAME Small Space Heater, 1500W Space Heaters for Indoor Use, Portable Heater with Thermostat, Knob Control, Overheating & Tip-Over Protection

HEATDAZ Space Heater, 1500W Electric Heater for Indoor Use, Desk Heater with Heating and Fan Modes with Thermostat AT-SH26

Lasko 5790 Portable Electric 1500 Watt Room Oscillating Ceramic Tower Space Heater with Remote, Adjustable Thermostat, Electronic Controls, and Timer

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

BLACK+DECKER Dual Function Desktop Heater & Fan, 3 Settings, 750W/1500W, Safety Overheat & Tip-over Protection, Easy Dial Controls, BHD406W, White

R.W.FLAME Portable Electric Space Heater, Ceramic Fan Heater with Handle, Tip-Over & Overheat Protection, 60–87℉ for Home & Office

BLACK+DECKER Ceramic Heater, Space Heater for Office Desk, Home Office & Personal Use, 2 Heat & Fan Only Settings, Thermostat, BHDC500W46, White

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

ZAFRO Space Heater, Ultra Quiet Portable Electric Heaters for Indoor Use with Thermostat, 1500W Large PTC Ceramic Fast, Digital Display

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

Small Space Heater,Portable Space Heater,with Overheat & Tip-Over Protection Office Room Desk Indoor Use

Costway Electric Portable Ventless Laundry Dryer, Folding Drying Machine Heater

HEATDAZ Smart Space Heaters Indoor Use, 1500W Portable Heaters with Remote&APP Contorl, PTC Ceramic Heater 12H Timer, Overheat Protection

Vie Air 1500W Portable 2 Settings White Office Fan Heater with Adjustable Thermostat

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

Optimus 700-Watt Electric Portable Oil-Filled Radiator Heater

Optimus Radiant Parabolic Dish Electric Space Heater in White

BLACK+DECKER 360-Degree Surround Heater and Fan Combo with Remote, For Office & Home, 2 Heat & Fan Only Settings, Adjustable Thermostat, BH1607, White

BLACK+DECKER Ceramic Space Heater with Thermostat, Vertical or Horizontal Use, 3 Heat and Fan Only Settings, Oscillation Function, BHVHC15, Black

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