A Holiday Inn Express in Mesa failed to obtain proper permits before installing tankless water heaters that later caused a dangerous carbon monoxide leak, endangering dozens of guests and sending several people to the hospital, records show.
The newly uncovered code violation from the city of Mesa shows the hotel conducted work without required permits.
Mesa fire investigators say the newly installed tankless water heaters caused the carbon monoxide leak that hospitalized multiple guests, including Lashley and Tania Hatch…