Greenhouse fan heaters with built in thermostats (Parasine) are very
inaccurate sometimes they can vary by 10 degrees F.
I put my heater thermostat up to max and use a plug in digital thermostat
switch into which the heater plugs in.
I have noticed that the plug gets warm (3kw heater) when the heater is
switched on & thus influences the plug in thermostat. Nevertheless, this
setup is more accurate and the temperature fluctuation between when the
heater switches on & off is far smaller.
Has anybody found any other solutions?

Glen