put tube amp on to shelf of a rack

@jollygreenaudiophile2 Hey thanks for the detailed information. I ordered two 120mm AC Infinity usb powered fans as they can be blutacked on the floor where my VAC tube power amp sits on right now. 

And I can't agree more about the lifting heavy amp part. As age catches up I no longer dare take the risk lifting equips around 100lb by myself. Not to say slide them into tight spaces. If I have to, I need to get the right set of tools that make me comfortable doing so.

"Hwa Rang Do"? "Carson city, Century city or Seoul"?
In any case, Your quite welcome, "Yuhengdu T."!
I will add though; They do offer "separately", A very nice filtering system you may add to any of the fans that they make/sell. It is a simple "Injection molded", filter housing which comes with a, "washable and re-usable", foam filter. You attach them as you will. "They were not any help at all when I called them about this".
But the filter housings have a hole-thru, in each corner. "I simply used self-tapping, (Tappets)". And I installed three each on my "T-8" units. Two each on my "S2's", (And so-on). And I have maybe a case of them left if you would like a few. "They described them over the phone where I ordered them not understanding that they were re-usable. And they were very hard to find on the web-site for some reason....."I never have seen a pic of these"!
 Adding the filters to the system made a lot of sense to me and gives you that, "Warm and fuzzy", that is o-so-satisfying once you add them!

The link shown in your post is not enough space between shelves for all those tubes, IMHO. Even with fans I wouldn’t do it. Get yourself a separate amp stand if you want the amp down low, but heat rises, so I’d personally have the amp more at eye level. That’s an amp that deserves to be on the top shelf, I mean who doesn’t like to look at the glow of tubes. If you’ve got it, flaunt it!