Vents CO2 Sensors Sale they work in opposite cycles:

they work in opposite cycles: one unit brings fresh outdoor air into the room while the other exhausts stale indoor air outside

it features a telescoping inner sleeve

living areas

reducing the strain on your furnace and lowering heating costs

and flexible speed control

Vents CO2 Sensors Sale they work in opposite cycles:Breathe Easy with our Wall Mounted CO2 Sensors available in two Models. The CO2 1 features LED lights that indicate power level (1, 2 or 3) based on Co2 level and on off status. The CO2 2 does not feature an LED lights and is more suitable for premises that require constant ventilation. (schools, libraries, etc). They also have a relay output that can turn your fan on or off based on indoor CO2 levels. These sensors are designed to work seamlessly