Astro Pneumatic Industrial Heavy-Duty 9426 Heat Gun The Astro Pneumatic Industrial Heavy-Duty 9426 Heat Gun has variable temperature adjustment provides a maximum temperature of 1000-1100 Degrees F and a powerful blower that provides a high volume of air needed for industrial applications. Moves 23 CFM. The Astro Pneumatic Industrial Heavy-Duty 9426 Heat Gun also features a cool air setting for cooling tool and for no-heat applications that adds versatility.