Hi GreenMan,   Thanks for the reply. We specifically use the MR76/MR86 in greenhouses because of the heat and damp/water. The MR48E we use mainly for warehouses.   We did ask a Cisco partner and many other people, but there is hardly any knowledge on wireless in greenhouses (our greenhouses are like 600x250 meters in size with many cells). The glass is not the issue. Its the leafs that is causing the issues. We did a proper measurement with Ekahu for one cell (80x40 meters and we needed 32 AP's for just one cell. Standing in a row with an AP two rows away the signal drops to -85 already.   ... View more