DIYAPASON-L Digest #220 - Monday, January 1, 2001
 
Re: [Residence Organs]  New Blower
  by <p.wilson2@juno.com>
Blower Insulation
  by <TheGluePot@aol.com>
Re: [Residence Organs]  Blower Insulation
  by "Kurt Schlieter" <kschliet@execpc.com>
Re: Blower temperature
  by <TheGluePot@aol.com>
 

(back) Subject: Re: [Residence Organs] New Blower From: <p.wilson2@juno.com> Date: Sun, 31 Dec 2000 22:21:42 -0800   > Does anyone know where I can buy this "peaked foam" that was spoken > of on this thread? > > Sincerely, > Bart Kleineweber   In the medical business, it's called 'egg-crate foam' for obvious reasons. It's available from home-health supply places, Target, Wal-Mart, Walgreen's, etc.   In the acoustical field, I believe it's called 'sound-dampening foam'. I don't know where you can purchase it. Check McMaster-Carr, Grainger, or the Thomas Register. All are accessible on-line.   Be aware, though, that this foam is the Dreaded Polyurethane. The stuff decomposes at the drop of a hat. For use around an organ, acoustical foam would probably be better. If I remember correctly, it has stabilizers added during manufacture, thereby inhibiting the decomposition process.   Shalom, Preston p.wilson2@juno.com    
(back) Subject: Blower Insulation From: <TheGluePot@aol.com> Date: Mon, 1 Jan 2001 04:25:13 EST   As a professional organ builder and installer I would HIGHLY recommend = that a number of steps be taken to keep from burning down your house. The blower =   should have both types of overload protection. It should not be put into = a box with flammable sound deadening materials. Fibreglass insulation that = is completely fireproof is the best way to go and the box should have a = cooling fan with noise baffles of its' own. I even go so far as to put a thermal cutout in the muffler box. The reason for the above steps is a fact = missed by most amatuer builders, pipe organs do not use a lot of air so the = blower cannot be a self-cooled device.   Be careful out there and I hope everyone has a Joyous and Safe New Year,   Al Sefl   p.s. A hot blower also delivers hot air to the pipes and tuning goes to hades!  
(back) Subject: Re: [Residence Organs] Blower Insulation From: "Kurt Schlieter" <kschliet@execpc.com> Date: Mon, 01 Jan 2001 11:11:00 -0600   Good points Al, The Sanfillipo organ has a seperate cooling system for the blower room. Consistent air temperature is essential for tuning stability. This is a = subject that this list could spend a lot of time on, and probably should. I once removed an organ from a residence where the blower enclosure was = made of white styrofoam insulation boards. The styrofoam eventually started to = break apart, and, as a result, the entire instrument became fouled with white = plastic beads. They were everywhere, in the chests, the action, the pipes. Kurt     TheGluePot@aol.com wrote:   > As a professional organ builder and installer I would HIGHLY recommend = that a > number of steps be taken to keep from burning down your house. The = blower > should have both types of overload protection. It should not be put = into a > box with flammable sound deadening materials. Fibreglass insulation = that is > completely fireproof is the best way to go and the box should have a = cooling > fan with noise baffles of its' own. I even go so far as to put a = thermal > cutout in the muffler box. The reason for the above steps is a fact = missed > by most amatuer builders, pipe organs do not use a lot of air so the = blower > cannot be a self-cooled device. > > Be careful out there and I hope everyone has a Joyous and Safe New Year, > > Al Sefl > > p.s. A hot blower also delivers hot air to the pipes and tuning goes to > hades! > > DIYAPASON-L: a Discussion list for owners and builders of their own > Residence Pipe Organs. > HOMEPAGE : http://www.diyapason.pipechat.org > List: mailto:DIYAPASON-L@pipechat.org > Administration: mailto:owner-DIYAPASON@pipechat.org    
(back) Subject: Re: Blower temperature From: <TheGluePot@aol.com> Date: Mon, 1 Jan 2001 15:12:42 EST   Thanks Kurt:   I once did an article for *The Glue Pot* about blower temperature rise and =   the effects it has on the organ. This problem is overlooked on so many installations and I am glad to hear that some bright person thought ahead = for the Sanfillipo organ. Offhand I cannot remember the exact figure but if memory serves, one horsepower will create 5,700 BTUs of waste heat per = hour. That is more than enough to create tuning problems in any small enclosed organ such as a home installation. I therefore always admonish the = architect working for a prospective client to put the blower into a utility area = where the air can be controlled or stabilized.   We were lucky at the San Francisco FOX where the Sanfillipo blower was originally installed as one of a pair of 50hp units. The cement room had = a tremendous thermal mass and the intake through the basement doors drew air =   that varied very little in temperature throughout the entire year. (For = that matter San Francisco doesn't vary much either, today it is 64 degrees in = my back yard patio on a "cold" winter day while in the summer with the fog in = it will be a blistering 68 degrees!).   Best wishes to everyone on the New Year,   Al Sefl