Your che can be your only heat source but you still need a dimmer or thermostat. You would still want a ir temp gun or the acurite 00891. If your going to use the che as your only heat source you have to take your temps on the ground where the middle of where the che hits. If you buy the acurite you can put the probe on the hot side ground and the rest of the unit on the cool side so you can have your hot side, cool side, and humidity all on one device. Again if your using the analog style temp and humidity gauges you are getting inaccurate readings.

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