DIY 12k 33 Ohm Carbon Fiber Ceramic Heater
The heater has proven itself to be excellent, heating up to 60 degrees Celsius in 1.5 hours at room temperature.
Link to carbon fiber: https://a.aliexpress.com/_AMey2A
How to calculate power:
Voltage ÷ resistance = electrical power
12K = 33 ohms/meter
For example: 220V (10 meters * 33 ohms) = 150W, (15 meters * 33 ohms) = 100W.
Therefore, the longer the length, the lower the power, and the lower the temperature.