The installation cost for energy efficient heaters such as the tank-less or on-demand heaters is a little higher. In case of an on-demand unit, the average cost will lie in between $3200-$4500. Tank-less heaters on the other hand begin from $2800 and end at $3800.
191 Followers. A. Shingles is contagious and can be spread from an affected person to babies, children, or adults who have not had chickenpox. But instead of developing shingles, these people develop chickenpox. Once they have had chickenpox, people cannot catch shingles (or contract the virus) from someone else.
Those most at risk for shingles are: 1  Anyone who has already had chickenpox - Shingles is basically a second outbreak of the chickenpox virus. Since it is caused by a preexisting virus in the body, shingles is not contagious and can not cause other forms of herpes. It could, however, cause chickenpox in someone who hasn't had chickenpox before.