rhino1 said:
Forget that spinning brush thing that you attach to your vac hose, it's a POS that you will hate.
Very true, those spinning brushes for the end of the vac hose suck ass.
Joey, you'd be surprised how thorough of a job you can do with some nice MANUAL brushes to loosen the crap up, then use some compressed air to blow it towards your vacuum source. Your TM has plenty of power, if used properly. You won't be able to cut out one hole like with the huge machines, rather you'll cut several holes depending on how long your rods and vac hose can go. I've seen a lot of crap missed by those spinners. The whiskers have too much flex, and tend to skip over the hard stuff, usually anything that was crusted on from condensation. Those manual brushes are made of nylon, and are much stiffer. Put a T handle on the end, it works much better. Heck, on my last job, I pulled out a nice flat head screwdriver, a hammer, and some 2 X 4 with the brushes, no way would a spinner do that!!...

... Just make sure you get an assortment of rods and brushes. The flexible rods work great for the round ducts, or anywhere there are bends. The stiff ones work great for feeding your air line or brush through the long straights without kinking. You won't mess up your TM if you put a dust downer on your vac hose. I use one, and they work great, no different than cleaning nasty carpet. All of the particulate is liquidated, so it's no problem for your blower. You can pick one up for like $50.
My brother who helps me regularly, used to work for a HVAC company doing installs, air duct cleaning, etc, that had one of those big, expensive trucks. It had a 10" hose, pulled like 10,000 cfm, just a monster. Anyway, after seeing the job that machine did, versus the job mine does, he was pretty impressed. Does mine do the same job? No. There is no replacement for displacement. But, for us to do 90% as good at a tiny fraction of the cost of that machine, I'm happy with it, and so far the custy's are too, since without that huge operating cost of the monster machine, I can cut them a better deal, and that's all that matters.