Deep fryer heaters are designed to provide quick and efficient heating of the oil. They can reach high temperatures rapidly, allowing you to achieve the desired cooking temperature for your fried foods without long waiting times. It come with built-in temperature controls or thermostats.The fryer is an extremely popular kitchen appliance used in about 85% of food service establishments. It is designed to cook foods such as chicken, fish, breaded vegetables, specialized pastries, and of course, the classic French-fried potato.