The first inequality means that the distance between x and c is greater than 0 and that x â  c, while the second indicates that x is within distance Î´ of c. Note that the above definition of a limit is true even if f(c) â  L. Indeed, the function f need not even be defined at c.
Once inside a hot water heater, however, Legionella bacteria multiplies and is conveyed through the household plumbing, where it may be inhaled in the aerosol mist that accompanies showering, bathing or even washing dishes in a sink. Very young children and elderly people are particularly at risk.
1 Domestic Hot Water System-Design Procedure-A domestic hot water system design procedure. 2  Hot-Water Storage Tank Dimensions with Capacities-Dimensions and capacities of hot-water storage tanks. 3  Sizing Domestic Hot-Water Heaters-Domestic Hot-Water sizing formulas-heating capacity, recovery rate and power supply.