What Is Electric Resistance Heating?
Electric resistance heating creates heat by passing electricity through a metal element. The element resists the flow of electricity, which produces heat.
How Electric Resistance Heating Works
- Electric current flows through a metal coil
- The coil resists the flow
- That resistance creates heat
This is called the Joule effect.
Why It Became Popular
- Low installation cost
- Simple design (no moving parts)
- No need for ducts or fuel lines
- Easy to control with thermostats
It was widely used before high-efficiency systems became available.
Types of Distribution
- Baseboard heaters
- Wall heaters
- Radiant floor systems
How Efficient Is Electric Resistance Heating?
Electric resistance heat is 100% efficient at the point of use.
That means all electricity becomes heat.
But here’s the key issue:
- It takes a lot of electricity to produce that heat
- It does not multiply heat like a heat pump
A heat pump can deliver 2–4 times more heat per unit of electricity.
Comparison to Other Systems
| Feature | Electric Resistance | Heat Pump | Furnace |
|---|---|---|---|
| Efficiency | 100% | 200–400% | 80–98% |
| Operating Cost | High | Low | Medium |
| Installation Cost | Low | Medium | Medium |
| Heat Output | Direct | Amplified with Heat Exchanger | Combustion |
| Cooling | No | Yes | No |
Key Takeaway
Electric resistance heating is simple and cheap to install. But it is expensive to run. Heat pumps are a much more efficient choice for most homes today.
