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.
Marine Water Heater. A marine water heater is a heating device used in boats and ships for heating water as well as spaces. Powered by either electricity or propane, a marine water heater is a way to provide instant and required amount of hot water for tasks such as washing-up, personal hygiene, and shower, besides cooking etc.