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Duct booster fans
The DBF 110, DBF 4XL, and DBF 4XLT are pressure-activated products designed to overcome long duct runs. The DBF 4XLT relays the status of operation with an indicator panel.
Duct booster fans
Duct booster fans (DBF) are practical for various applications in residential buildings, from boosting the air into the back bedroom to exhausting some hot or stale air.