Max Swing Diameter (Offset): 118" Max Load Capacity (Offset): 3500 lbs BTU/hour (Burn Rate): 3,200,000 Space Required (L x W x H): 20.6' x 13.6' x 10.8' Heat Source: Natural Gas Controller: IDEC Electrical Requirements: 460v - 3 ph Notes: Has Some New Variable Frequency Drives