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Reseller HomeUltra user guide
AirFlow Technology
  • Sail Switch (Air Pressure Switch)


Avoid wiring your duct fan into you furnace with the sail switch
  • wiring directly into your furnace could void a warranty or cause furnace failure
  • the sail switch turns your inline duct fan on utilizing the air pressure from your main blower to engage the trigger on the switch
  • the sail switch is installed in the branch duct between the main branch and the booster fan