[18]. High-temperature axial ac fans are therefore engineered with advanced materials and ac axail construction methods to withstand continuous operation in extreme thermal environments[14]. Components are frequently fabricated from heat-resistant alloys, such as specific grades of stainless steel or high-nickel alloys, which maintain structural integrity and prevent creep (deformation under stress) at elevated temperatures[18]. The motor and bearings, the most thermally vulnerable components, require specific protection. In some designs, such as Bifurcated Axial Fans, the motor is placed outside the main air stream within a separate tunnel or sleeve built into the fan casing, allowing the conveyed air to bypass the motor entirely and drastically reducing its operating temperature[18].