That's fairly silly. Of all the consumer electric products on earth, heaters are inherently the least expensive. That is to say you can get cheap, good ones.
- A 1500-watt cheap tossie is $12 and will last a year.
- A quality oil-filled heater is $40 and will last 10-20 years.
- A proper, fixed-installation 2000W baseboard heater is $50 and will last 20-30 years.
So it's silly to misuse a tool for not its intended purpose, when the right stuff is easily affordable.
Even the wiring will be inexpensive, and I hope you'll do it right rather than hork something together with cheapie extension cords which are not rated for 1500W loads. That's how the recent Oakland fire started.