While no single person invented the electric heater, Albert Leroy Marsh's 1905 invention of the chromel alloy revolutionized the industry, making it the "father of modern electric heating". Before Marsh, early electric heaters used Thomas Edison's light bulb technology, but Marsh's alloy was more efficient and durable. 

Here's a more detailed look:

Early Electric Heaters:

In the late 1800s, early electric heaters used the technology of Thomas Edison's light bulbs, with high-powered bulbs radiating heat into a room. 

Albert Marsh's Contribution:

In 1905, Albert Leroy Marsh invented chromel (or nichrome), a metal alloy that was much more durable and efficient at creating and dispersing heat than the light bulb technology used in earlier heaters. 

The Chromel Alloy:

Chromel is a special alloy that is extremely strong, has a high heating point (1,400 degrees Celsius), and is corrosion-resistant. 

Impact of the Invention:

Marsh's invention allowed for the development of more efficient and practical electric heating systems, leading to the rise of electric heating as a viable alternative to fuel-based heat sources. 

Modern Infrared Heating Elements:

Modern infrared heating elements still use the basic principle of Albert Marsh's original design.