the 100165931 prevents unburned gas accumulation and nuisance shutdowns

Is the 1192977 compatible with R-22 systems

The mechanical spring return ensures the application returns to a predefined safety position during a power loss

Attempting to adjust the set point on a fixed-pressure switch can compromise system safety

Zonefirst AOBD-18X8 Damper R-410A the 100165931 prevents unburned gasThe Zonefirst AOBD 18X8 is a professional grade automatic opposed blade damper designed for rigorous residential and commercial HVAC zone control applications. Featuring an 18 inch width by 8 inch height side mount configuration, this unit is engineered with an extruded anodized aluminum frame and blades to resist corrosion while maintaining a slim profile. The integrated 24Vac power open power closed actuator ensures positive airflow shutoff and