Fraggle Rock
Member
Ok, let me clarify some things, just so you have them for reference. Most houses are set to around 70F year round. This means the ambient air you are drawing from the rest of the house, no matter the means, is around 70F.
That means that even if your temps are running a whopping 15 degrees above ambient, you're only at 85, which is perfectly fine for our favorite plant. With the amount of air those fans can move, you shouldn't be running anywhere near 15 degrees above ambient. As you stated, you're already running just a few degrees above ambient.
When I was running a similar setup, I used just a single 8" Vortex 747 cfm to cool 2 kw, and my only intake was the central air. Using just that, my temps were only 1-2 degrees F above ambient. By the way, a 6 inch fan for flouros, WOW
Also, as far as upsetting the balance of the system, you are severely underestimating the amount of air a central unit moves I can say, from experience, that it will not have any noticeable effect on the temperature of the rest of the house.
Hope that helps for a bit deeper understanding of what we're dealing with in temp control
Man, thanks for that...It makes sense. I will use the central AC vent and see what happens....I know my 6" is overkill, but it keeps the temps and humidity in check. I could probably use a speed controller for that one and turn it down just a bit.