Looking for space heater suggestions.

[Tsanford]

I use a DeLonghi Oil-Filled Radiator like this one in my snake room that's similar in size to yours. It's plenty to keep the room from falling below 78°F during the year.

To maintain that temperature, I plug the radiator into a Ranco thermostat similar to this one from Reptile Basics.

Now, I have one question for you as well. Why are you looking to be able to change temperatures between day and night?

I use this same one, but the black model. It's does the job well enough to only be on low power (700 watts), but only on power level 3.