Yahoo Answers is shutting down on May 4th, 2021 (Eastern Time) and beginning April 20th, 2021 (Eastern Time) the Yahoo Answers website will be in read-only mode. There will be no changes to other Yahoo properties or services, or your Yahoo account. You can find more information about the Yahoo Answers shutdown and how to download your data on this help page.
Trending News
Promoted
Air Monitor reading LEL 1 % ... is that good or bad in house with gas furnace ... why does it change from 0% to 1% ... CO is 0 ppm?
1 Answer
Relevance
- ?Lv 76 years agoFavorite Answer
LEL is the Lower Explosive Limit. 100% would be an explosive atmosphere.
1% is a very slight issue, in fact, it may only indicate that your instrument needs to be calibrated.
Still have questions? Get your answers by asking now.