Conventional spin and charge Nernst effects emerge from the spin-orbit coupling mechanism. Here we present a theoretical and computational investigation of Nernst responses in anisotropic ferromagnets, systematically analyzing contributions originating from both electrons and magnons. Through symmetry analysis, we identify giant intrinsic Nernst conductivities in MnAl(101) that persist at room temperature. Remarkably, the calculated spin and charge Nernst conductivities at 300 K reach values of $6.7\hslash \text{/}2e \mathrm{A}{\left(\mathrm{mK}\right)}^{-1}$ and 33.7 $\mathrm{A}{\left(\mathrm{mK}\right)}^{-1}$, respectively, which even exceed the spin-orbit coupling driven mechanism. Our findings establish low-$Z$ transition metal alloys as a promising materials platform for spin-caloritronic applications, while providing fundamental insights into the interplay between crystalline symmetry and transverse thermoelectric spin transport.

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• Magnetic anisotropy
• Nernst effect
• Spintronics
• Thermal conductivity
• Transport phenomena
• First-principles calculations