Heat Recovery Ventilator Number of Speeds 3 CFM @ 0.100-In. SP 268 CFM @ 0.300-In. SP 246 CFM @ 0.400-In. SP 231 Voltage 120 60 Hz 1 Phase 2.7 Max Amps Sensible Effectiveness (@ 32 F) 91 Total Recovery Efficiency (@ 95 F) 18 Latent Effectiveness (@ 95 F) 18 Wiring Method Plug Motor Type External Rotor Max Inlet Temp (Deg. F) 140