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.
Today the region continues to be the epicentre of the HIV/AIDS epidemic, with 48 per cent of the worldâs new HIV infections among adults, 55 per cent among children, and 48 per cent of AIDS-related deaths [1]. The Southern Africa sub-region, in particular, experiences the most severe HIV epidemics in the world.Nine countries-Botswana, Lesotho, Malawi, Mozambique, Namibia, South Africa, Swaziland, Zambia and Zimbabwe-have adult HIV prevalence rates of over 10 per cent.oday the region continues to be the epicentre of the HIV/AIDS epidemic, with 48 per cent of the worldâs new HIV infections among adults, 55 per cent among children, and 48 per cent of AIDS-related deaths [1]. The Southern Africa sub-region, in particular, experiences the most severe HIV epidemics in the world.