Film-Tech Forum ARCHIVE: Xenon bulb heater

This is topic Xenon bulb heater in forum Film Handlers' Forum at Film-Tech Forum ARCHIVE.

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Posted by Markus Lemm (Member # 3456) on 12-07-2005, 01:24 AM:

Anyone know if it is possible to use a lamphouse to heat the booth or the theatre. I was told that it is no longer an issue with bulbs emitting dangerous gases (Ozone) when operating. So I wonder if, since I work in Canada and it is very cold in the booth, that I could add a fan to the top of the lamphouse and pump the heat into the booth or the theatre instead of just venting it outside. Has anyone done this?

Posted by John Pytlak (Member # 331) on 12-07-2005, 05:40 AM:

Some codes may still prohibit it. With some lamps, even the little bit of ozone generated by the lamp and the high voltage ignition could be hazardous to your health. Ozone can be generated by intense ultraviolet energy ("ozone-free" lamps have envelopes doped with a material that filters out most of that UV) and high voltage discharge.

For sure, if you ever smell the pungent smell of ozone, you should vent it. Consider using a simple heat exchanger (e.g., fins on the vent pipe) to get more heat from the lamp exhaust.

Posted by Marin Zorica (Member # 1716) on 12-07-2005, 07:25 AM:

Interesting!

Why don't ve construct lamp house what would heat booth! Consider plex booth with 5-10 machines with 4000-7000 KW bulbs, what a HEAT!

I know stories from older projectionist and carbon arc time, if you get cold tea, open lamp house and put tea to worm it up!

Or you can dry jackets near the lamphouse!

Posted by John Pytlak (Member # 331) on 12-07-2005, 07:27 AM:

quote:
I know stories from older projectionist and carbon arc time, if you get cold tea, open lamp house and put tea to worm it up!

There were some hazardous things in the ash and exhaust of carbon arc lamps.

Posted by Daryl C. W. O'Shea (Member # 1303) on 12-07-2005, 10:00 AM:

Well I sure as heck can't pass up an opportunity to tease Rick.

How do you think canned beans would cook in a lamp house?

Posted by Jack Ondracek (Member # 1466) on 12-07-2005, 10:50 AM:

Better have a can of Bon Ami on hand to clean up that reflector!

Those arc lamps sure made good cigarette lighters, though... under the excuse of "testing the trim", of course.

Posted by Monte L Fullmer (Member # 2797) on 12-07-2005, 01:09 PM:

Yep, use a razor blade (single edge) to scrape off the copper "spits" from the surface of the mirror, then a good ol' scrubbing with BonAmi to clean and polish the mirror.

Yes, I remember those early xenon bulbs with that nasty ozone smell that would come from the exhaust - worked in a dumpy little theatre that had switched from carbon to xenon and he didn't vent the lamphouses due to that they were small lamphouses and that odor was pretty pungent up in that small booth. Luckilly, I wasn't working then when he did switch over - I was not needed anymore.

Posted by Jon Miller (Member # 163) on 12-07-2005, 07:35 PM:

quote: Daryl C. W. O'Shea
How do you think canned beans would cook in a lamp house?

Probably very well, but be sure to puncture vent holes in the can. It may be just a projectionist's urban legend, but as I mentioned in page 2 of this vintage thread, someone messed up a Magnarc pretty bad by not venting the can. [Eek!]

Posted by Marc Hansen (Member # 705) on 12-07-2005, 11:05 PM:

This should do the job

Posted by Markus Lemm (Member # 3456) on 12-07-2005, 11:54 PM:

Thanks, that looks like exactly what I need.

Posted by John Hawkinson (Member # 1135) on 12-08-2005, 02:54 PM:

If you seriously do that, you may need to upgrade your stack fan. Make sure to measure that you're getting adequate airflow and adequate cooling.

--jhawk