I highly recommend Darwin chambers. Not only are they very competitively priced but the quality and reliability is greater than other companies we have dealt with in the past (ie: Conviron, Percival, Fisher). Yes, my two departments here at UCD have purchased a few chambers from Darwin over the last ~10+ years. We purchased 6 custom built environmental control rooms to rear insects from Darwin back in 2012. We have been very happy with the speed in which the chambers were installed, the responsiveness and ease of which it is to work with personnel from Darwin Chambers, the quality of workmanship, and the reliability of the chambers. All 6 chambers still look new and are running great. We have been so pleased with the quality, reliability, and professionalism from Darwin that since 2012 we have purchased multiple reach in chambers for several different labs in our departments and had another custom built environmental room installed in Briggs Hall ~2019. Of all the environmental chamber companies I have worked with, I would rate Darwin the best by far. - May 9, 2023