No, but I worked at one that had an Organ Blower Room. I SO wanted to steal that sign!
That's better than there's something living in my amp rack."There's a liver in my amp rack"
(Kidding)
True as I pointed out in justifying some early all LED projects. Also smaller chillers, boilers, fan coil units, and ducts, so initial cost savings as well. Another reason replacing incandescent in an existing theatre is hard to justify. Many savings not available.Nobody has gone to this yet so I'll throw in a comment. Everyone talks about LED saving power versus tungsten/incandescent but the real power savings are in HVAC, without those big incandescent loads heating the building you can install smaller air conditioning units and you actually save more money on cooling than on lighting itself.
Bob
802.3af ("PoE") is 12.95 W, 802.3at ("PoE+") is 25.5 W (these are the power available to the powered device, source power is higher), 802.3bt (currently being called "Next gen PoE" or "100W PoE" in the literature that I've found) supports 51 W or 71 W.
@BillConnerFASTC "smaller chillers, fan coil units, and ducts" I understand but "smaller boilers," how so?True as I pointed out in justifying some early all LED projects. Also smaller chillers, boilers, fan coil units, and ducts, so initial cost savings as well. Another reason replacing incandescent in an existing theatre is hard to justify. Many savings not available.
Do arch. / spec engrs. actually use lighting loads as an input when sizing HVAC?Nobody has gone to this yet so I'll throw in a comment. Everyone talks about LED saving power versus tungsten/incandescent but the real power savings are in HVAC, without those big incandescent loads heating the building you can install smaller air conditioning units and you actually save more money on cooling than on lighting itself.
Bob
Yes. I do a detailed statement for every project on cooling loads. It's a third or fourth with all LED compared to all incandescent. And there is usually a long discussion if diversity and length and likelihood of a big show in middle of day on hottest day of the year.
Yes, not sure why I added boilers. That would probably not change though the heating contributionn of lights is missing ....
Have come across a lot of elephant rooms in old theatres - and a camel room in a Scottish Rites temple.
Yes. The lighting load with traditional fixtures is huge.
Theatres are challenging for mechanical engineers - they have to balance the fact that the "peak load" of both lighting and occupancy occurs often and all at once and for a few hours at a time. They also have to account for acoustics and have air move at much lower speeds than normal.
I've often thought about this... DMX is a fairly slow protocol. I wonder why a standard has not evolved for sending DMX data right through power distribution. Even the old 10 Meg Ethernet can be sent this way and could handle 40 universes. Pretty easy to piggyback the carrier at distribution, then simply set the universe and address at the fixture. With that type of setup it would be as easy as hanging a conventional rig. Just plug and go. No separate data lines.
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