- Efficient enough to melt copper
- PID control using homemade electronics
- uses standardised components
- relatively portable without causing damage to any party including furnace
- fails safe pls
- easily maintained
- safe power supply: overcurrent protection, requires earthing, hard to shock self on, reasonable safety factor, adequate cooling
- too easy to touch mains voltage
- hard to control
- ludicrous inefficiency leading to poor performance and high maintenance costs
- difficult to repair
- difficult to manufacture
- choppy voltage source may have led to excessive coil wear
- poor analytical understanding