One element- sounds like a "test kiln". They fire pretty fast, and you can't really compare them to a kiln with 4 or 6 elements. That said, test kilns are usually 120 V.
To answer both of your questions yes i am asking how gradually to increase the temprature, and it is a 240v duncan kiln, i don't know the model or exactly how big it is; it has 1 element and 2 peepholes if that helps.
i'll post a picture of the kiln as soon as i can.
- Iforgot likes this