Review on BN-LINK Digital Temperature Controller - Efficient Heating Cooling Thermostat Controller for Reptiles, Aquariums, Homebrewing, and Fermentation by Todd Look

I use heaters for my milk house in my greenhouse and the thermostats suck. They work great and have sufficient throughput. Excellent temperature sensors with sufficiently long leads can be placed at a reasonable distance from the heaters. I would like an extension cord for better placement of the sensor. Easy to use but the instructions are difficult to understand. You'll figure them out eventually, but some engineer must have written them! LOL It has one output for heating and one for cooling. When heating, set the maximum temperature. The minimum temperature is set by selecting the range. That's how they describe it, but you set the lower temperature to the minimum you want to allow. I used 10 degrees so the heaters don't turn on too often and you don't waste a lot of energy on frequent starts. The heater turns on the circuit when the temperature drops to the minimum temperature. The cooling turns on the fan when the maximum temperature is reached. If you accidentally connect the heater to cooling mode, the heater will never turn off because the control system will try to turn off at the minimum temperature, which will never happen with the heater. This should make setup easier than the instructions you are given. Apart from that I love them!