For example, a Noritz gas tankless hot water heater of 199,000 BTUs is sufficient for an average household with several bathrooms. Factors such as installing proper ventilation to prevent carbon monoxide poisoning and completely changing the size of gas lines and fittings will take an average of 10 hours.
Shingles is contagious to people who have not previously had chickenpox, as long as there are new blisters forming and old blisters healing. Similar to chickenpox, the time prior to healing or crusting of the blisters is the contagious stage of shingles.hingles 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.
However, the shingles rash is not contagious in that a rash from one individual is unable to spread to another individual. Nevertheless, the disease of shingles can pass the virus from the active rash blisters directly to another individual who can become infected with the varicella-zoster virus.