Laminar natural convection heat transfer is studied in a tilted fluid system consisting of multiple layers of fluid separated by solid partitions with finite thickness and conductivity. A closed form solution is derived in the limit of a thin-layered system subject to a uniform heat flux from the sides and adiabatic boundary conditions at two ends. Results are obtained in terms of overall Nusselt number Nu as a function of Rayleigh number Ra, angle of inclination of the system φ solid to fluid conductivity ratioK, thickness of the fluid layersZ,-, thickness of the solid partitions t;, and number of partitionsZϑ. The critical Rayleigh number for the onset of convection in a bottom-heated horizontal system is predicted. The results are compared with limiting cases of the problem and are in agreement. A numerical study of the same phenomenon is obtained by solving the complete system of governing equations using a finite difference formulation and a volume control method. Good agreement is found between the analytical predictions and the numerical simulation.