Please help - HVAC guy confusing me!

[.F.]

So I'm building out a room in my basement to house 20-25 ASICs. The room is 10w x 11 x 7h. It's insulated and keeps the noise at bay pretty well.

However, my HVAC guy is just not getting it and is really making me upset. He convinced me to buy (2) 14,000 BTU AC units and installed a 450 CFM inline exhaust fan (no intake fan) with tubing going out the house. I told him upfront I needed at least 4,000 CFMs going in and out but he insists that the 28,000 portable AC units will compensate for the 60,000 BTUs of heat. To make things worse, after I told him what I wanted, he went ahead and got the 450 CFM fan and didn't tell me until AFTER he installs it that he thinks this will be enough. He hasn't once quoted me for labor, cots, etc. I'm so pissed off to say the least.

My question is: how should I handle this HVAC guy? I need him to do the work b/c it's too late to switch but should I take the AC units back and just install the high powered intake and exhaust fans? My biggest concern is the humidity in the summer time as it gets well above 95% humidity during spring and summer here (in Midwest). He says the AC units will help with humidity so that's why I'm tempted to keep them for those humid days.

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[philipma1957]

why oh why did you wait
to complain to us

At this point in time I would not have any idea on how to fix the mess  that has been made.


but 60000 btu  - 28000 btu = 32000 btu  you have not dealt with.

[NateDoggETH]

Why did you let him in or to do work without you there or having terms already?

I would have that conversation real quick with him (record it on phone or have a witness there if possible) and bring up the fact he did that work and purchase without your authorization and you are not going to pay for install or equipment.

If you do not put a red line down, contractors will run right over you. If he gets pissy, just handle it in small claims court. You will pay around $50-100 to sue him and if he doesn't show up to court you get a default judgement. If he does, have him provide a signed agreement for the work. Either way, sounds like it would be a win for you. (I've never sued anyone, but if they tried to screw me, I'd screw them twice as hard)

Now as for the AC it looks like you already bought.... i can't help you there. I exhaust as much heat and bring in fresh air. (I have around 3800ish cfm exhaust)

[mojoxc]

Lol, gotta love the average AC guy, most don't understand what you are trying to do as they have never seen it,  It is your responsibility to make sure that it is right as it is way outside the normal request for residential ac guys.

[NateDoggETH]

If you can return or sell the AC units he got you to purchase, then just install gable attic fans for exhaust. The more you can, the better. home depot has some that are 1300CFM for ($80ish) but you can find some 3000 CFM ones on Amazon for good price and have multiple of them. The 2 I have use 2.8 AMPS each compared to what AC would be. plus you wont have to worry about condensation issues in the future from possible humidity.