1 Table of Contents: “... of active solar space heating systems -- 1.11 Simulation of solar heating systems -- 1.12 Economics of solar...”

2 “... in it, the solar energy can be utilized more effectively and economically for heating the water both for domestic...”

3 “... countries are trying to solve their industrial, social and economical problems to increase their standard...”

4 “... countries are trying to solve their industrial, social and economical problems to increase their standard...”