<div dir="ltr"><div>There is no way one pound of dry ice will be sufficient for that volume of space for any significant effect. How long do you want the effect to last? That is an important question. I want to say 60 lbs is overkill but it really depends on the duration of the effect. The volume and speed you can get the ice to sublimate into a gas will vary a bit as the water you heat it with chills as more dry ice is added to it. I've used the city theatrical Aquafog 3300 before for a production of Phantom. It did the job very well. We probably went through at least 50lbs. per night for the Phantom's boat ride with Christine into his lair but we had a larger space to fill (approximately 25' x 50'). We split the fog into two output hoses to more evenly disperse the effect. Definitely wait as long as possible to dump the ice into the hopper so you do not chill the water at all before beginning the effect. Dry ice is more difficult and costs more than fog fluid might. Cost-effectiveness of the gag depends on what you have or have to rent as far as gear and the cost of the ice vs. fluid. The billowing look of dry ice fog is great and it is CO2, so getting complaints about irritation to fog fluid does not happen. Have a ton of towels standing by each night just in case of spills or some excess condensation coming through the hoses. City Theatrical's data sheet on the Aquafog 3300 says 50lbs. of dry ice lasts around 10 minutes. For a faster effect, make sure you get pellets of dry ice rather than bricks of it. If your supplier can only get you bricks, make sure you break it up in advance with a hammer or other implement of destruction. A greater surface area of the ice reacting to the water will increase the speed of the effect. Keep in mind that I last used this around 6 or 7 years ago so I might be a little shaky on the numbers. Contacting whichever manufacturer of the gear you use to find out their estimates is something I would recommend. They can probably tell you more specifics about volume output per pound of ice used over a duration of time. <br><br></div>A hazer is definitely the wrong device to use. A fogger with a chiller unit can certainly work but there is something special about the look of rolling clouds of CO2. Keep in mind that foggers take up space. Once they are filled with water, they are heavy and awkward to move. Water can slosh through open vent ports. Look at power requirements as well. I think the Aquafog 3300 required at least two independent 20A circuits. Check the requirements of whatever fogger you go with and make sure you have dedicated power for it. <br></div><div class="gmail_extra"><br><div class="gmail_quote">On Sun, Jan 28, 2018 at 8:27 PM, Richard Niederberg via Stagecraft <span dir="ltr"><<a href="mailto:stagecraft@theatrical.net" target="_blank">stagecraft@theatrical.net</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div dir="ltr"><div>Don't want it to roll into the pit? An exposed Nichrome wire across the lip of the stage could be helpful. Just let it heat up fully before you release the fog, and don't let the Musicians or their instruments get near it.</div><div>/s/ Richard</div></div><div class="gmail_extra"><div><div class="h5"><br><div class="gmail_quote">On Sun, Jan 28, 2018 at 5:15 PM, Don Taco via Stagecraft <span dir="ltr"><<a href="mailto:stagecraft@theatrical.net" target="_blank">stagecraft@theatrical.net</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div><div style="color:rgb(0,0,0);font-family:arial,helvetica,sans-serif;font-size:12pt"><div>I've also learned that they don't want it to roll into the pit. And that the tech guy says they need 60 pounds, but the person who asked me thinks a pound will do. Heh.<br></div><div><br></div><div><br></div><hr id="m_1839470392475939546m_-3963033474428242590zwchr"><div><b>From: </b>"Steven Hood" <<a href="mailto:shood_td@yahoo.com" target="_blank">shood_td@yahoo.com</a>><br><b>To: </b>"Stagecraft Mailing List" <<a href="mailto:stagecraft@theatrical.net" target="_blank">stagecraft@theatrical.net</a>><br><b>Cc: </b><a href="mailto:taco@peak.org" target="_blank">taco@peak.org</a><br><b>Sent: </b>Sunday, January 28, 2018 4:57:56 PM<br><b>Subject: </b>Re: [SML] Dry Ice<br></div><br><div><div style="color:black">
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<p style="margin:0px 0px 1em;color:black">I wouldn't use a hazer for low-lying fog... I might use a regular fogger piped through a slightly-modified freezer.</p>
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<p style="margin:10pt 0px;color:black;font-family:Arial,sans-serif;font-size:10pt">On January 28, 2018 4:41:09 PM Don Taco via Stagecraft <<a href="mailto:stagecraft@theatrical.net" target="_blank">stagecraft@theatrical.net</a>> wrote:</p>
<blockquote class="gmail_quote" style="margin:0px 0px 0px 0.75ex;padding-left:0.75ex;border-left-color:rgb(128,128,128);border-left-width:1px;border-left-style:solid">
<div style="color:rgb(0,0,0);font-family:arial,helvetica,sans-serif;font-size:12pt"><br><div> Here's what I've been asked.. How much dry ice to cover 19'x30' about 4 inches. Most dry ice fog info is in terms of how long it will last, not volume. I'm sure your experience can answer this, though. Thanks!<br></div><br><div> My first answer was, "Why wouldn't you use a hazer?<br><br></div></div>
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