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.
What this means for us, in laymanâs terms, is that heated water has a tendency to rise upward and displace colder water. For example, when water is heated on a stove, hot water from the bottom of the pan rises, displacing the colder denser liquid which falls. Most hot water heaters are equipped with âheat trapsâ between the intake/outtake pipes and the heater itself.