Joining two heaters

[krisway]

One baseboard heater currently installed with a dbl pole thermostat. How do I add a second heater to this thermostat?

 

[Bondo]

Ayuh,... Wire it in parallel off the t-stat, or in series off the other heater......

 

[Gary S]

Ayuh,... Wire it in parallel off the t-stat, or in series off the other heater......

Parallel of the thermostat, yes, if the thermostat can handle the current rating of two heaters.
Series off the first heater, no, because you cut the current flow so neither one will heat properly.