I am replacing 2 100"

Question

I am replacing 2 100" long Electromode baseboard heaters. The service from the thermostat is on the lefthand end facing the unit.They are 240 volts and I do not know what the wattage is. 1.Can I use the present thermostat for your unit. 2. Can I connect both together as they were before. 3.The room is 20x30 ft. with a high ceiling and I still have 2 Electromode units as described on the other side of the room that I am not replacing at this time. They are completely seperate from the units I am replacing.What units do you suggest?