A furnace CO2 meter is a device used to measure the amount of carbon dioxide (CO2) in the air. This type of meter is used in a variety of settings, including industrial and residential. In industrial settings, the meter is used to monitor the CO2 levels in a building or factory to ensure the safety of the workers. In residential settings, the meter is used to measure the amount of CO2 in the air to ensure the safety of the occupants. The CO2 levels in the air can affect the air quality and can be a sign of potential health risks. The furnace CO2 meter is an important tool for measuring and monitoring the air quality in any environment. It is important to use the meter regularly to ensure the safety of the occupants and to maintain the air quality in the building.