I needed a unit that could control a ventilator to cool down a room when it was colder outside than inside. This unit did the job. I had god communication with the dealer. He made som modifications, so it fitet my needs.
Dec. 10, 2018
Item arrived in good time and does exactly what it says.
I am using thermostat to regulate transfer of hot air from top of sunny conservatory down a pipe via 2 in-line fans and through a wall into a living room. Differential setting ensures efficient on/off periods to maximise heat transfer. I am very happy with this neat and well made product.