Wide Application Range: Compatible with both R404A and R507A refrigerants

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

This unit is optimized for NG heating systems

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

It is often included in high-temperature gasket kits for these industrial assemblies

BROAN-NuTone MD10TU Damper 328140-751 Wide Application Range: Compatible withThe 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