  Non-reciprocity is increasingly scrutinised in contemporary physics and
engineering, especially in the realm of heat transport. This concept opens up
novel avenues for directional heat transport and thermal regulation.
Nonetheless, the development of non-reciprocal thermal metamaterials confronts
three primary challenges: a constrained operational temperature range and
structural scale, considerable energy dissipation, and the limitation of
non-reciprocal effects due to external parameters that are not freely
adjustable. To surmount these hurdles, we propose a reconfigurable approach to
non-reciprocal heat transport. The design features a simple asymmetrical
structure, with a flat panel made of natural, evenly-distributed material,
positioned vertically on one side of a central horizontal board.We employ
natural convection on the vertical plate to facilitate non-reciprocal heat
transport. The reconfigurability of non-reciprocal heat transport is achieved
by adjusting the number of vertical plates and their thermal conductivity.
Theoretical computations of the rectification ratio are employed to quantify
and forecast the non-reciprocal effect, corroborated by simulations and
empirical studies. We also establish correlations between the rectification
ratio and various parameters, including the vertical plates' positioning and
height, ambient temperature, and the temperature differential between heat
sources. Control over multiple parameters can efficaciously widen the scope of
non-reciprocal control and streamline experimental procedures. Furthermore, our
research exclusively utilises the natural convection of air for non-reciprocal
heat transport, obviating the need for Supplementary energy sources and
markedly enhancing energy efficiency.
