The best replacement for space heater is central heat.

The best alternatives to space heater are rated as following:
★★★★★  central heat
★★★  furnace
★★  heat pump
★★  gas heat
★★  baseboard heater
★★  radiator
★  gas fireplace
★  electric blanket
★  electric furnace
★  central heating
★  gas furnace
★  wall heater
★  oil heater
★  electric fireplace
★  furnace cheaper
  ceramic heater
  baseboard heat
  electric heat
  electric baseboard
  oil heat
  central air
  baseboard
  house heater
  air conditioner
  heater
  heat lamp
  baseboard heaters
  gas heater

Your alternative for space heater is not listed? Suggest!
Speaking about space heater, one probably shouldn't forget about extension cord.

Other search terms related to space heater and their ratings are:
★★★★★ extension cord
You have in mind a companion for space heater and it is not yet here? Propose!



Google Trends

Scale is based on the average worldwide traffic of space heater in all years. Click on graph for more.
space heater
central heat
furnace