This diploma thesis describes hydraulic properties of specific types of fittings designed to HVAC systems with primary focus on pressure losses of these fittings. We are focusing on comparison of specific fittings with usual systems of spiro pipes in the project part of this thesis.

This thesis deals with the solution of differential equations of the first degree. The work is intended to serve as a textbook (a collection of exercises) for students of teaching mathematics at lower secondary schools. Each chapter contains a summary of basic concepts, solved task models of the related topic, sorted by difficulty, and finally tasks assigned for independent practicing. This thesis aims to present basic knowledge about ways of solving differential equations of the first degree, including practical skills for their solution.