Product review (5 stars): Excellent quality commercial-grade humidify/dehumidify controller
This humidify/dehumidify controller from Titan Controls works incredibly well. It maintains 50 +/-5 %RH in a climate controlled experimental chamber with ease. My environment contains a lot of airborne cement dust that is very hard on electronics, but this unit has outlasted and outperformed all others that I have tried. In the winter, I switch it to humidify and plug in a&nbsp;<a data-hook="product-link-linked" class="a-link-normal" href="/Ideal-Air-700860-Humidifier-Commercial-Grade/dp/B00L2L3OXQ/ref=cm_cr_arp_d_rvw_txt?ie=UTF8">Ideal-Air 700860 Humidifier Commercial Grade</a>&nbsp;humidifier. In the summer, I switch it to dehumidify and plug in a cheap basement dehumidifier. The setpoint is not entirely accurate but, once calibrated using a normal RH meter, it is very precise. Mine shipped without the control knob, but the manufacturer had one shipped to me within two days. This unit is a bit more expensive than some, but is a high-quality commercial-grade unit that will last a long time in many environments.