The fan you list is for an "in-line" fan meaning it is intended to exhaust from a specific location or room to a upper sidewall or roof vent. It can exhaust wherever convienient, low/high, roof, sidewall etc..The fan probably can be mounted above ceiling, in attic etc..and requires duct work at both ends.
It is not specifically designed to remove moisture or humidity unless you plan to remove it from say a bathroom/shower facility.
A fan in-itself will not technically remove relative humidity except for the fore mentioned. For example if the outside relative humidity is 80% and depending on your structures design, insulation, and other factors the inside humidity maybe similar. A fan will typically introduce the same humidity as it's exhausting. Same reason you wouldn't use a fan in your window of your house during the sun light hours.
If your structure will have an attic, you may want to do an in-wall gable vent fan at one end with a intake vent at the other. This will lower the attic temps and cool the structure overall. You could also do a whole house exhaust fan in the ceiling that will vent to the attic but again won't do much for humididty except when outside humidity is low to cool the hot interior.
http://www.globalindustrial.com/c/h...mpaignId=T9A&gclid=CPD2jtGpma8CFQdN4AodKB3bxQ
http://www.grainger.com/Grainger/whole-house-fans/exhaust-fans/hvacr/ecatalog/N-8wb
If humidity is an issue than research a de-humidifier. A constant running humidifier will also create some heat but with your size i wouldn't see as a big concern. An air-conditioner will also cool as well as remove humididty.
One of the bigest things you can do to keep the humidity down is to insulate properly.
