Using a blow dryer on low heat may help warm up a small area or a person directly in front of it, but it is not an efficient or practical way to warm up an entire room. Blow dryers are designed for personal use and are not intended to heat large spaces.
To warm up a room effectively, you would need a more powerful and energy-efficient heating source, such as a central heating system, electric space heater, or a radiator. These devices are designed to distribute heat throughout the room and maintain a comfortable temperature.
Using a blow dryer to heat a room can also be dangerous and a fire hazard if left unattended or used improperly. Additionally, it can consume a significant amount of electricity, leading to higher energy costs compared to using a dedicated heating appliance.
If you want to warm up a room, it's best to rely on proper heating equipment designed for that purpose. Be sure to follow safety guidelines and use energy-efficient options to keep both yourself and your wallet safe and comfortable.