blocked return air registers

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using this Armstrong Air R02708C024 ensures the unit maintains its original AFUE rating and operational safety

ensuring reliable burner sequencing and preventing unnecessary service calls

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BROAN-NuTone L250E Ventilator 323080-701 blocked return air registersThe BROAN NuTone L250E Ventilator is a direct replacement for the legacy L250 model, engineered specifically for high capacity ventilation in light commercial environments such as conference rooms and public restrooms. This Energy Star certified unit delivers a powerful 270 CFM rating at a whisper quiet 1. 5 sones, ensuring compliance with ASHRAE 90. 1, IECC C, and IMC building codes. The unit features a rugged 20 gauge galvanized steel housing lined