Advice on fan for microscope chamber

[miketd]

I am a scientist trying to optimze airflow for a 37 deg. C. incubation chamber surrounding my microscope (see below). Since I know you guys are experts on airflow in computers, I thought I might ask you for help:

I have a regulated heater with an outflow connected to the chamber on one side via vacumm tubing, and the inflow on the other (a modification of the version shown in the image). The problem is that he fan provided with my heater is wimpy, and the temperature inside of the chamber is not even. I need to get enough circulation in the chamber so that the temperature is the same everwhere. Evaporation isn't a worry, so having lots of airflow is o.k.The hope would be to move the most air possible with the least amount of vibration.

I was thinking of trying to put a fan(s) in-line with the current tubing, but any other thoughts (including putting fans inside of the chamber) would be greatly appreciated.
Thanks,

Mike

 

[Little Grabbi]

Add one fan on the top, about 12 cm away from the left edge. HAve this blow to the right.

Take another, this time on the bottom, 12 cm away from the right edge. Have this one blow right. If the actual microscope platform would disrupt airflow (it seem slie that to me), point the fan at where you put your slides.

This should get sme circulation going if you use standard 80mm fans.

 

[zer0signal667]

Another idea that would help is to insulate the chamber. That plastic doesn't look very thick and some insulation would help keep the heat from leaving so fast and thereby give you a more uniform temperature distribution in there. Does that heater have some sort of temp probe that it gets feedback from, or does it just pump out 37 degree air constantly?
Like Little Grabbi said, one or more fans inside the chamber would be your best bet for circulating air. If you need low vibration, you should go with quality, lower RPM fans and use 2 of them, one near each end of the chamber.
Another thing about the heater... does it feed the air through that tiny tube that i see behind the microscope? Does it recycle the air or just keep pumping new air in? What kinf of airflow does it put out? It may be possible that it's not able to heat a chamber that large with so many air leaks and so little insulation.