@Everyone
You are all (mostly) linking me plastic toys fan, not understanding i need to vent close to 60000BTU so i will re-iterate, since i guess i wasnt clear enough;
I already have two big 20inch fan in parallel in exhaust configuration, i need website sites where i can buy something better or similar heavy duty fans that i might have missed that i can get, at least as good as the one i linked in OP. I can find them all over ebay, but for some reason, i can't seem to find retail for them.
So i must of missed some.
If its -10C outside you really shouldn't need any fans, the high pressure/low pressure should force the cold air inside your room. Maybe open the door to your room so there is cross ventilation.
So, you think you can cool 20kW without fans?
That won't do. I already have two 20inch box fan in parallel and its not enough, ergo the need for upgrade to metal window fans.
Yeah i can't use these, its not even good CFM
![Tongue](https://bitcointalk.org/Smileys/default/tongue.gif)
I thought of using 12 inches one in parallel but its not cost effective. Beside i have a 17*50 window opening, no reason to use something that compact
![Tongue](https://bitcointalk.org/Smileys/default/tongue.gif)