Water heating is a thermodynamic process that uses an energy source to heat water above its initial temperature. Typical domestic uses of hot water include cooking, cleaning, bathing, and space heating.In industry, hot water and water heated to steam have many uses. common arrangement where hot-water space heating is employed, is for a boiler to also heat potable water, providing a continuous supply of DHW without extra equipment. Appliances that can supply both space-heating and DHW are called combination (or combi) boilers.
1 The population of South Africa is estimated at 53,139,528 as of July 1 2014. 2  South Africa's population is equivalent to 0.73% of the total world population. 3  South Africa ranks number 25 in the list of countries by population.
West Africa is the only sub-region in sub-Saharan Africa with a Muslim majority. In contrast, the southern part of Africa has the smallest Muslim population. The number of Muslims in West Africa is projected to increase by more than 60% in the next 20 years, from nearly 160 million in 2010 to about 257 million in 2030.he population of sub-Saharan Africa â both Muslim and non-Muslim â is much younger, on average, than the population in other regions. The median age in Muslim-majority countries in sub-Saharan Africa in 2010 is just 17; in non-Muslim-majority countries in the region it is 19.