Question 1

When is a space heater cheaper than central heating?

Accepted Answer

When heating 1–2 rooms with the thermostat lowered 5–8°F. A single 1,500W heater at 4–6 hrs daily costs $32.40–$48.60/month vs $80–$120 for gas furnace.

Question 2

Can I heat my whole house with space heaters?

Accepted Answer

Yes, but it’s almost always more expensive. Four 1,500W heaters at 8 hours costs $259.20/month — more than most furnace bills.

Question 3

Should I turn down the thermostat when using a space heater?

Accepted Answer

Yes. A space heater only saves money if you reduce central heating simultaneously. Lower to 58–62°F and heat only the room you’re in.

Question 4

Are heat pumps cheaper than space heaters?

Accepted Answer

Usually. Heat pumps produce 2–3 units of heat per unit of electricity (COP 2–3). Space heaters produce 1. For whole-home heating, heat pumps cost $50–$80/month vs $130+ for multiple heaters.

Space Heater vs Central Heating in Hawaii