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Author Topic: Projector/Console Ventilation Andrew McCrea Jedi Master Film Handler Posts: 645 From: Winnipeg, Manitoba, Canada Registered: Nov 2000 posted 03-18-2001 09:12 AM                        One quick question... The ventilation pipe on to of the console/projector... is it air conditioning or exaust? ------------------ Andrew McCrea "I'm Not Bad, I'm Just Drawn That Way!" - Jessica Rabbit Ken Layton Phenomenal Film Handler Posts: 1452 From: Olympia, Wash. USA Registered: Sep 1999 posted 03-18-2001 10:52 AM                     Exhaust. It usually is either a 6" or 8" diameter duct. Gordon McLeod Film God Posts: 9532 From: Toronto Ontario Canada Registered: Jun 99 posted 03-18-2001 10:59 AM                     exhaust with 150 -700 cfm at 6 or 8" opening In most areas in Canada it is legally required to be vented directly to the outside enviroment John Pytlak Film God Posts: 9987 From: Rochester, NY 14650-1922 Registered: Jan 2000 posted 03-18-2001 07:13 PM                        Even "ozone free" xenon lamps produce a bit of ozone (the high voltage ignition and ultraviolet energy break down oxygen molecules that then recombine into ozone), which is not good for your health. So all lamps should be vented. The large amounts of heat also need to be vented outside, or the projection room quickly becomes hot and dry. ------------------ John P. Pytlak, Senior Technical Specialist Worldwide Technical Services, Entertainment Imaging Eastman Kodak Company Research Labs, Building 69, Room 7419 Rochester, New York, 14650-1922 USA Tel: 716-477-5325 Cell: 716-781-4036 Fax: 716-722-7243 E-Mail: john.pytlak@kodak.com Web site: http://www.kodak.com/go/motion Mark Gulbrandsen Resident Trollmaster Posts: 16657 From: Music City Registered: Jun 99 posted 03-18-2001 08:09 PM                     If you are running 2KW or above go with the largest blower you can. I reccomend the higher CFM around at least 700.Even larger lamps require more. This will allow you to get maximum life, plus more out of the lamp. Mark Gordon McLeod Film God Posts: 9532 From: Toronto Ontario Canada Registered: Jun 99 posted 03-19-2001 07:29 AM                     Actually you can over cool xenon lamps and as such always follow the manufacturers recomendations for the exhaust requirements Overcooling can cause thorium migration quartz blacking and unstability Barry Floyd Phenomenal Film Handler Posts: 1079 From: Lebanon, Tennessee, USA Registered: Mar 2000 posted 02-24-2003 05:31 PM                        Am I out of line by telling the HVAC engineer to provide for 900 CFM on the exhaust stack for my 4kw Xenex II lamphouse? Finding an exhaust fan to pull that kind of CFM's is not hard, but increasing the size of the HVAC unit to compensate for the amount of air exhausted from the room is expensive? Does anybody know of a better way to provide "make-up" air to the projection booth? What about "outside air"?  |  IP: Logged Will Kutler Phenomenal Film Handler Posts: 1506 From: Tucson, AZ, USA Registered: Feb 2001 posted 02-24-2003 06:00 PM                     As for lamp exhaust, follow the manufacturer's recommendation. I do believe that both Christie and Strong provide all of the tech info regarding proper equipment recommendations/usages in their product brocheures.  |  IP: Logged Bernard Tonks Jedi Master Film Handler Posts: 619 From: Cranleigh, Surrey, England Registered: Apr 2001 posted 02-24-2003 06:08 PM                     Havn't seen this method of ventilation since carbon days. Any advantages? Picture taken from Kinepolis Switzerland 8 by Mike Baer.  |  IP: Logged Richard Fowler Film God Posts: 2392 From: Ft. Lauderdale, FL, USA Registered: Jun 2001 posted 02-24-2003 06:46 PM                     I have done the same situation on some of my multiplex projects with the booster fan and negative exhaust...easier to balance out and no chance of dumping hot exhaust into a console that is not on or situated at the end of the run. Richard Fowler Kinoton America Inc.  |  IP: Logged David Stambaugh Film God Posts: 4021 From: Eugene, Oregon Registered: Jan 2002 posted 02-24-2003 06:53 PM                        Are you saying that each lamphouse exhaust in a typical multiplex may share common ductwork with other lamphouses? Like "X" number of lamphouse exhausts converge in 1 vent outside? Maybe I'm misunderstanding. [For a second there I thought Andrew McCrea was back! ]  |  IP: Logged Daryl C. W. O'Shea Film God Posts: 3977 From: Midland Ontario Canada (where Panavision & IMAX lenses come from) Registered: Jun 2002 posted 02-24-2003 07:17 PM                        Yeah Dave, I've seen some installations with only one outside stack. It's probably a carry over from change-over booths which normally only had a single outside stack. Personally I don't like having only one outside stack in a multiplex. If your outside motor dies you might end up with a booth full of hot lamphouses, whereas with individual stacks, if one dies only one lamphouse gets hot. Of course, with one outside stack you have a lot less snow to shovel when the snow drift gets too deep. Barry, I've always wanted to try (in a fairly warm climate -- certainly not in Canada during the winter) having an outside airduct fed into the bottom of the console to reduce the amount of air drawn from the room. You'd have to be careful about not having really cold drafts though.  |  IP: Logged David Favel Jedi Master Film Handler Posts: 764 From: Ashburton, New Zealand Registered: Feb 2002 posted 02-24-2003 07:59 PM                     Yea, I was about to wish Andrew a happy birthday...  |  IP: Logged David Stambaugh Film God Posts: 4021 From: Eugene, Oregon Registered: Jan 2002 posted 02-24-2003 08:07 PM                        So if 1 stack is shared by, say, 6 lamphouses, you're saying there's possibly only 1 exhaust fan for all 6 (presumably at the stack)? Well, I gotta say, even to a dumb-as-a-bag-of-hammers, non-film-handler like me, that just sounds like a wrong-headed way to design a cooling system that's protecting a lot of expensive equipment. Are those exhaust fans typically belt-driven? Belt breaks, nobody's paying attention... Sounds like a recipe for a costly "incident".  |  IP: Logged Daryl C. W. O'Shea Film God Posts: 3977 From: Midland Ontario Canada (where Panavision & IMAX lenses come from) Registered: Jun 2002 posted 02-24-2003 08:10 PM                        Usually you would have a motor/fan above each projector and one at the end, outside. Some older ones use belts, most new ones use direct drive fans.  |  IP: Logged

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