<html> <head> <META HTTP-EQUIV="Content-Type" CONTENT="text/html; charset=us-ascii"> <meta name=Generator content="Microsoft Word 10 (filtered)"> <style>  </style> </head> <body lang=EN-US link=blue vlink=blue> <div class=Section1> See notes interspersed.   One of the things that was of top priority for me was that the unit had to be quiet. I first used a shop vac with the air hose, but felt that the noise level was unacceptable for the amount of time it had to be running.   <div> Rex Roseman </div>   -----Original Message----- From: Nicholas Gravagne [mailto:ngravagne@gmail.com] Sent: Tuesday, February 14, 2012 11:47 AM To: pianotech@ptg.org Subject: Re: [pianotech] CA fume fan   Rex -- thanks for this hose idea and photo. The thing looks pretty cool actually. We need a clever name for it now. Just to be clear, it is the unit in the photo which is "set outside a door or in a window" while the 4" "flexible hose is held close to the pins while gluing..."                         Yes So, you actually use one hand to hold the hose while applying CA with the other, right? BTW, a note to us all, a flexible dust collection hose behaves more like a slinky; it bends and moves very nicely. Don't confuse all 4" dust collection hoses as truly flexible ones.             Yes and yes. It takes some practice, but being right handed, I will hold the hose with the left and apply the CA with the right. One thing that you need to watch for is that the slinky type hose has the possibility of marring the finish if it is dragged over the corner of the piano. A cloth or over protection on the stretcher and ends of the piano in a grand is helpful. Same on an upright but different parts. I am thinking of some sort of handle or maybe duct taping the hose to my arm so that it doesn’t have to be held. RE "The reduction of the size of the fan housing to the size of the hose is supposed to create a vortex affect that increases the air flow as compared to what the fan would normally pull in an 8" duct." Yes, airflow increases at the smaller diameter hose (also creating a "pulling" force just behind it), but at the expense of air pressure which then decreases. But I would think that increased airflow is what we would want anyway.             Yes. There is very little air pressure created. You cannot suck any objects into this. All it does is pull air. I don’t think that you could even get small bits of dust and dirt to pickup. But the moving air makes all the difference in the world as far as fume control goes. Rex, could we possibly press you for a photo of your storage unit and hose?             Attached are a couple of pictures of the unit together and stored to transport. I was using a clamping hose a wing nut adjustment to for tightening to keep the flex hose attached to the duct work, but had to swipe it to repair my wife’s drier hose. Because that end of the unit is not moved, I haven’t found a problem with the hose falling off just stuck on the end. It is stored in a 30 gallon “Sterilite” storage container. The cord is 25 foot and the hose is around 10-12 foot. The hose is made of a clear plastic which, as you described, has a slinky type reinforcement inside. Sorry I don’t the any other information as to where I got it as it has been a while. In any case, thanks again. NG <div>   </div> </div> </body> </html>