The aim of this study is to analyze vector and scalar depending variables in parallelogram enclosures which changing angle of inclination measured from horizontal plane in laminar natural convection conditions. Parallelogram enclosure has two isothermal opposite walls with different temperatures, and two adiabatic mating walls. Mathematical model described by the system of partial differential equations which solved by numerical procedure, control volume method. Results of numerical procedure, treated by original software demonstrate values of variables in estimate domain, as velocities, pressures and temperatures. There are comprehensive graphic presentation obtained by named results.