“The utility realized it was sending out the wrong mixture of gas to air to appliances such as boilers, clothes dryers, and stoves, with too much natural gas being sent out into the supply line. That type of mix could lead to carbon monoxide leaking into homes and businesses…”  Businesses affected included the Marriott Hotel on Railroad Street.

https://www.unionleader.com/news/safety/utility-malfunction-causes-carbon-monoxide-scare-in-keene/article_f427e91b-f973-5a26-983b-908cecffbf3e.html?utm_medium=social&utm_source=facebook&utm_campaign=user-share&fbclid=IwAR0CiOhgdaS6u9d_b0fElVVxF67gwlQG5RdZUUbMnlvvQ4Pzc-gu7bPHuRA