there were no microwaves on the market specifically designed or recommended for use as room heaters. Microwaves are intended for heating food and beverages, and their design and safety features are optimized for that purpose.
There are several reasons why microwaves are not suitable for use as room heaters:
Design and Safety Concerns: Microwaves are engineered to be used with the intention of heating food and beverages, not rooms. Their internal components, such as the magnetron, are not designed to handle extended periods of operation or heating larger spaces. Attempting to use a microwave as a room heater could lead to safety hazards, including electrical fires or damage to the microwave itself.
Inefficient Heating: Microwaves primarily emit electromagnetic waves that are specifically absorbed by water molecules in food. They are not designed to effectively heat air or larger objects. Even if you were to run a microwave with its door open to heat a room, the energy efficiency would be extremely poor compared to using dedicated room heaters.
Inadequate Heating Capacity: Microwaves have limited power outputs compared to room heaters. Room heaters are designed to generate a significant amount of heat to warm a room effectively, while microwaves have much lower power ratings, typically ranging from 600 to 1,200 watts.
Safety Regulations: Consumer electronic products, including microwaves and room heaters, are subject to safety regulations and standards. Using a microwave in a manner not intended by the manufacturer could lead to safety issues and could void any warranty or liability coverage.
For heating rooms, it's best to use appliances that are specifically designed for that purpose, such as electric space heaters, radiators, or central heating systems. These appliances are built to provide efficient and safe heating for different room sizes and are tested and certified for that specific use.