This is the 50% down payment for this fan with a total price of $1790.00Balance due by cash or check after acceptable installation. This fan has more performance than any QuietCool fan because1. It is tested to pull more air flow. QC overstates their flow.2. It has 10 speeds - QC has two. 3. It takes very little electricity at low speed. The QC Trident PRO uses PSC motors that take almost as much power at low speed as at high speed. Per their spec - Hi: 1147 watts / Low: 797 wattsThis fan is a new VentCool Summit 4.9 whole house fan - here are the specifications - Air Flow (CFM) HVI-916 Standard: 916 (Low Speed) | 5,202 (High Speed)Wattage (High): 850 (Low) 28Efficiency @ High (CFM/Watts): 6.1Sound Level (dba): 60Speed Settings: 10Voltage: 120vSilencer Duct: 20" x 7'Remote speed control TimerSmartphone remote AC power control.