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The SH Sheet Metal Co. 21-RAB is a return air box designed for HVAC systems. This product measures 21 inches and is made from 26 gauge sheet metal. It provides an efficient way to return air into the HVAC system.
This return air box is essential for improving airflow in HVAC setups.
We pulled together the parts most installs need for this unit, plus a few add-ons worth a look. Check what you need — nothing here blocks checkout.
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