or use a clamp meter to verify current draw is consistent with the 70W power rating

The components are designed to mitigate back-siphonage risks in low-flow commercial and residential installations

A reading of "OL" or high resistance outside the 10-20 ohm range indicates the silicon carbide has reached its end of life

and high temperatures for a longer service life in heavy-duty cycles

BROAN-NuTone MD10TU Damper 328140-751 or use a clamp meterThe BROAN NuTone MD10TU is a heavy duty 10 inch universal automatic make up air damper engineered to resolve negative air pressure issues in modern, tight envelope residential construction. Designed for seamless integration with range hoods over 300 CFM, this HVAC pressure relief valve synchronizes with the exhaust system to provide fresh air intake, preventing backdrafting of combustion appliances. The unit features a normally closed motorized damper