start_month(string): This field is currently unused. Must be one of: ["JANUARY", "FEBRUARY", "MARCH", "APRIL", "MAY", "JUNE", "JULY", "AUGUST", "SEPTEMBER", "OCTOBER", "NOVEMBER", "DECEMBER"]. Default: "JANUARY".
num_months(number, format: Months, required): Number of months used in ground heat exchanger sizing. Minimum: 1.
timestep(string): This field is currently unused. Simulation timestep used in ground heat exchanger sizing. 'HYBRID' is the only option currently available. Must be one of: ["HYBRID", "HOURLY"]. Default: "HYBRID".