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.
Many people with shingles wonder if they are contagious. While the varicella zoster virus can be spread to those who have not had chickenpox, shingles itself cannot. The virus behind shingles can be spread to other people. Shingles itself is not contagious. This transmission, which only occurs through direct contact with blisters, would cause chickenpox in someone who has never been infected with the virus. During the times before blisters and after crusting, there is no risk of viral transmission.