Astro Pneumatic Heat Gun Industrial Heavy-Duty 9426 The Astro Pneumatic Heat Gun Industrial Heavy-Duty 9426 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 Heat Gun Industrial Heavy-Duty 9426 also features a cool air setting for cooling tool and for no-heat applications that adds versatility.