I have had a 60mm cooling fan on the back panel of my H2D since I got the printer. Recently I added a W3230 thermostat with the temp probe on the MC heatsink.
So I made a discovery, the external fan either blowing or sucking does little to nothing for cooling the heatsink. Also the heatsink runs at chamber temperature.
I thought what if I deliver the cooling air to the heatsink with a duct? Bingo 20 C drop in MC heatsink temperature.
