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.
The shingles rash is contagious (for someone else to catch chickenpox) until all the blisters (vesicles) have scabbed and are dry. Also, if the blisters are covered with a dressing, it is unlikely that the virus will pass on to others. This is because the virus is passed on by direct contact with the blisters.