It is impossible for electrical heaters to be efficient. A watt is a unit of energy over time. An analogy would be to set your thermostat to 15 degrees and expect your room to warm up to 20 degrees.
The term "energy efficient", as we know it, primarily means that manufacturers have be able to reduce the amount of wasted energy for a motor, and most energy is wasted as either noise or heat.
Since electric heaters have no motor, if you put in 1000 watts of energy, you will get out 1000 watts of heat. There is no way to only put in 500 watts of energy and get out 1000 watts of heat
answered 5 years, 8 months ago
all electric heaters are 100% efficient baseboard ,convection e.t.c