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Author Topic: Venting lamphouses Sam Hunter Jedi Master Film Handler Posts: 779 From: West Monroe, LA, USA Registered: Jan 2002 posted 04-27-2003 11:04 AM                     I am about to embark on installing my projection system into my new home and the room I will be using is 8' X 10'. As you probably already know I have an ORC1600 lamphouse that I will be using for the light source. The replacement bulb is of the low ozone type. The manual says it doesn't need to be vented to the outside. So should I vent the thing or not. The only other reason to vent would be the heat buildup in the room. Anyway thats the thing going on at the moment.  |  IP: Logged Steve Guttag We forgot the crackers Gromit!!! Posts: 12814 From: Annapolis, MD Registered: Dec 1999 posted 04-27-2003 11:25 AM                     If possible, always vent xenon lamps to the outside. There are Ozone emissions from Xenon arc lamps...even those that claim to be "Ozone Free." Some people are quite sensitive to those emissions and will get headaches. Steve  |  IP: Logged Ken Layton Phenomenal Film Handler Posts: 1452 From: Olympia, Wash. USA Registered: Sep 1999 posted 04-27-2003 12:26 PM                     Steve's right---vent it!  |  IP: Logged Paul G. Thompson The Weenie Man Posts: 4718 From: Mount Vernon WA USA Registered: Nov 2000 posted 04-27-2003 02:29 PM                     Vent it.  |  IP: Logged Sam Hunter Jedi Master Film Handler Posts: 779 From: West Monroe, LA, USA Registered: Jan 2002 posted 04-27-2003 03:54 PM                     Just what are the hazards posed by Ozone?  |  IP: Logged John Anastasio Master Film Handler Posts: 325 From: Trenton, NJ, USA Registered: Sep 2000 posted 04-27-2003 05:16 PM                        Moderate levels can irritate the eyes, nose, throat, and lungs. Low-level exposures have been shown to cause significant temporary decreases in lung capacity in healthy, exercising adults. Some asthmatic individuals are especially susceptible to ozone toxicity, which includes constricting airways. Short-term exposures can cause increased sensitivity to airborne allergens and other irritants, and it can impair the body's immune system. Summertime ozone episodes in the northeastern U.S. lead to 10-20% increases in hospital admissions and emergency room visits. Human population studies of long-term exposures to low-level ozone indicate that it may lead to permanent reduction in lung capacity; animal studies have shown chronic high-level exposures can cause lasting structural damage in the lungs. Children, especially asthmatics, are most at risk from exposure to ozone.  |  IP: Logged Sam Hunter Jedi Master Film Handler Posts: 779 From: West Monroe, LA, USA Registered: Jan 2002 posted 04-27-2003 09:39 PM                     I am prone to allergies and asthma type symptoms so I guess I better vent after all. Thanks John.  |  IP: Logged Mark Maxwell Film Handler Posts: 55 From: Tyler, TX, USA Registered: Jul 2002 posted 04-28-2003 01:35 AM                     As far as I am concerned, if it can light a projector, vent it. If it is bright enough to light a projector, it is hot as hell. We had one projector that had the vent fan go out, the entire booth heated up to the point that it was unbearable to be on the one side that the projector sat.  |  IP: Logged John Pytlak Film God Posts: 9987 From: Rochester, NY 14650-1922 Registered: Jan 2000 posted 04-28-2003 07:59 AM                        Hazards of ozone: http://www.osha-slc.gov/dts/chemicalsampling/data/CH_259300.html http://www.cdc.gov/niosh/pel88/10028-15.html http://www.cci.ca.gov/Reference/ESDA.pdf http://www.arcesystems.com/products/ozone/safety.htm In other words, VENT YOUR XENON LAMP to the outside.  |  IP: Logged Sam Hunter Jedi Master Film Handler Posts: 779 From: West Monroe, LA, USA Registered: Jan 2002 posted 04-28-2003 10:01 AM                     Definately.  |  IP: Logged Michael Schaffer "Where is the Boardwalk Hotel?" Posts: 4143 From: Boston, MA Registered: Apr 2002 posted 04-28-2003 10:09 AM                        quote: I am prone to allergies and asthma type symptoms so I guess I better vent after all. It might also help if you vented your bedroom once a month.  |  IP: Logged Frank Angel Film God Posts: 5305 From: Brooklyn NY USA Registered: Dec 1999 posted 04-28-2003 05:37 PM                        When xenon bulb manufacturers claim their bulbs are low-ozone emitting, it is about as meaningful as food manufacturers claiming their products are "low fat." Take it with a grain of salt....salt-free salt. Vent it. Frank  |  IP: Logged Gordon McLeod Film God Posts: 9532 From: Toronto Ontario Canada Registered: Jun 99 posted 04-28-2003 09:24 PM                     Some ozon is also generated by the spark gap during ignition  |  IP: Logged Paul G. Thompson The Weenie Man Posts: 4718 From: Mount Vernon WA USA Registered: Nov 2000 posted 04-28-2003 09:31 PM                     Gordon, yes, some is generated by the spark gap. Some igniers splatter crap all over the place. Some don't. The ORC that Sam is using has a nice soft igniter. When the lamp fires, the igniter does not emit a 110 db SPL from the spark gap like some other manufacturers do. It is so smooth and quiet that all you hear is a lady-like "Plink" Just like starting an R-3350 aircraft engine. A few macho farts from the ehaust stacks (and sometimes from the carburator intake) and a HUGE cloud of engine oil smoke, it is running! (provided, of course, that you didn't bust a piston or blow a jug in the process of trying to start it.) With a turbojet engine, ignition sounds like a lady-like "poot" and it is running. No muss, no fuss with smoke being emitted from the tail pipe of the engine. (unless you have a wet start)  |  IP: Logged Dave Macaulay Film God Posts: 2321 From: Toronto, Canada Registered: Apr 2001 posted 04-28-2003 09:58 PM                     It's definitely best to vent it, there may not be a LOT of ozone but I would rather not have my home air ozone-enhanced. I regularly run lamphouses on test inside without a vent and I don't notice any smell or problems, bit our shop is large and a bit drafty. I have noticed that ozone smell when entering booths where an unvented lamphouse is operating. The heat is a question. You probably have air conditioning, so you have to consider whether cooling the extra heat load from the lamp is cheaper than cooling and dehumidifying the make-up air that's going to be sucked in from outside when you have the vented lamphouse blower running... the places I've been in Louisiana have featured hot and humid air most of the year. Probably the cost difference won't be huge, but it's going to cost you extra in A/C either way.  |  IP: Logged

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