Nadair SD-659-32SF Central Vacuum Power Unit, 659 AW, 8,000 Sq Ft 99A As a secondary filter loads

As a secondary filter loads with fine dust

or no-longer-conducting cord

lasting through multiple cleaning sessions

airflow drops and the motor strains to hold suction

Nadair SD-659-32SF Central Vacuum Power Unit, 659 AW, 8,000 Sq Ft 99A As a secondary filter loadsBuilt for larger residences, the Nadair SD 659 32SF central vacuum power unit covers homes up to 8,000 square feet. A 6. 6" two stage bypass (B P) motor produces 659 air watts, 144. 9" of water lift, and 136 CFM of airflow, delivering deep cleaning suction throughout an extensive tubing network. Debris is captured in a durable 8. 4 gallon spun aluminum dirt bin that empties cleanly and stands up to years of use. With a 65 dB sound rating, the SD 659