Your heat loss estimate of 19,500 btuh for the room indicates that you have a room that is either:
a. 20 12 feet if uninsulated as done before 1960.
b. 20 25 feet if insulated to 1970’s standards
c. 20 40 feet if insulated to today’s standards.
If this baseboard is going to heat an uninsulated room as in a above, you will save a bundle of money and can fit standard baseboard in if you blow in insulation and can add batts to the ceiling and floor. This is the greatest money saver. If this is an insulated room, then this must be the banquet room.