Tempered glass helps a lot with heat protection. In fact, heat-treated glass is tempered glass. Of course, the thicker the better. Make sure you adjust the Glass Thickness and Tempered options according to your needs with your order.
Heat-treated glass involves subjecting the annealed glass to a thermal process to increase its resistance, and to make it safer in case of breakage. The idea behind heat-treating glass is to substantially improve its strength, as well as making it safer in case of breakage.