Lennox 21Z11 Smoke Detector kit 326070-701 The MEIR4 specifically monitors the

The MEIR4 specifically monitors the flicker frequency of infrared radiation

this switch is designed to handle the standard voltages found in HVAC control strings

featuring Class B insulation and thru-bolt mounting for rigid installation in commercial and residential units

This switch is calibrated for a 15 PSI cutout (falling) and a 40 PSI cut-in (rising) pressure differential

offering versatile mounting options within ductwork or ceilings

Lennox 21Z11 Smoke Detector kit 326070-701 The MEIR4 specifically monitors theThe Lennox 21Z11 is a professional grade duct smoke detector kit engineered for seamless integration with commercial and light commercial air handling units. This HVAC smoke detection kit is critical for life safety compliance, providing rapid identification of combustion particulates within the supply or return air streams. Designed specifically for Lennox equipment, the 21Z11 interfaces directly with HVAC safety circuits and system control boards to