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.
A person with shingles is contagious from when the blisters first develop until after all of the blisters have crusted over. If the virus is transmitted from a person who has shingles to a person who has not had chickenpox, that person will develop chickenpox, not shingles.