How long does it take to heat up the glass tempering furnace?

The time for a glass tempering furnace to start heating up to the specified operating temperature shall not exceed 5 hours;

For initial oven heat-up or reuse of furnace after a non-operating period of 1 week or longer, the time for a tempering furnace to start heating up to the specified operating temperature shall be no less than 12 hours.

What is the maximum temperature of a tempering furnace?

The maximum operating temperature of an electrically heated tempering furnace must not exceed 800℃.