The Museum Pests recommendation concerns getting the temp down fast enough, so they recommend a robust freezer to do that, which is a solid recommendation. To be honest, I haven't had much of a problem getting items down to target temps in that time frame with some household standing freezers set at -10F/-23C. However, I usually do not pack those freezers too full, either, so they don't have to work too hard to get down that low.
Alan *Alan Van Dyke, *Senior Preservation Technician Harry Ransom Center The University of Texas at Austin P.O. Drawer 7219 Austin, Texas 78713-7219 P: 512-232-4614 www.hrc.utexas.edu <https://www.hrc.utexas.edu/> On Fri, May 27, 2022 at 10:12 AM Jim Moss <jmm...@umich.edu> wrote: > Sam Noble: I was basing -20F on the Museum Pests Recommendation: > https://museumpests.net/solutions-low-temperature-treatment/#:~:text=While%20infested%20items%20can%20be,temperature%20treatment%20in%20your%20freezer > . > > "A freezer capable of reaching minus 20 degrees F (minus 29 degrees C) > will sufficiently lower the materials to the freezing point within four > hours, which kills adult insects as well as their eggs. If the temperature > drop takes much longer, some insects are capable of producing an > ‘anti-freeze’ that allows them to survive freezing." > > Thanks Sandra! > I've spent way more time on this, than I care to admit, before thinking to > ask this group! > > Jim > > > On Fri, May 27, 2022 at 10:58 AM Sandra Budd <sb...@lasaweb.org> wrote: > >> Hi Jim, >> I just purchased this freezer and it has been working very well the >> past couple of months. I spent weeks trying to find one lower that was >> affordable and had the right dimensions. >> It has been maintaining -20F or lower. >> Sandra >> >> On Fri, May 27, 2022 at 10:50 AM Jim Moss <jmm...@umich.edu> wrote: >> > >> > Good morning all! >> > >> > I have been trying to find a chest freezer for IPM purposes, but have >> been unable to find one that is capable of -20F. Evidently there were new >> federal regulations passed last year, and models that would have been >> adequate have been "upgraded" are no longer rated for the appropriate >> temperature for IPM purposes, >> > >> > Has anyone purchased a freezer recently, or have any suggestions? >> > >> > Thanks, >> > >> > Jim >> > >> > -- >> > Jim Moss, Collections Manager >> > University of Michigan Museum of Anthropological Archaeology >> > Research Museums Center >> > 3600 Varsity Drive >> > Ann Arbor, MI 48108 >> > 734-615-8516 >> > jmm...@umich.edu >> > www.lsa.umich.edu/ummaa >> > >> > The University of Michigan is located on the traditional territory of >> the Anishinaabe people. >> > In 1817, the Ojibwe, Odawa, and Bodewadami Nations made the largest >> single gift to the early University, when they ceded land through the >> Treaty at the Foot of the Rapids so that their children could be educated. >> > Through these words of acknowledgment, their contemporary and ancestral >> ties to the land and their contributions to the University are renewed and >> reaffirmed. >> > >> > -- >> > You received this message because you are subscribed to the Google >> Groups "MuseumPests" group. >> > To unsubscribe from this group and stop receiving emails from it, send >> an email to pestlist+unsubscr...@googlegroups.com. >> > To view this discussion on the web visit >> https://groups.google.com/d/msgid/pestlist/CALMPW-XPOtWmOr-gdcrQiiJw7cNRHWF9jmBDtAvVoA9psMK6cg%40mail.gmail.com >> . >> >> >> >> -- >> Sandra Budd >> Assistant Director and Curator >> Latin American Cultural Center >> Latin American Studies Association >> 4338 Bigelow Blvd >> Pittsburgh, P.A. 15213 >> 412.916.7588 >> sb...@lasaweb.org >> https://lacc.lasaweb.org/ >> >> -- >> You received this message because you are subscribed to the Google Groups >> "MuseumPests" group. >> To unsubscribe from this group and stop receiving emails from it, send an >> email to pestlist+unsubscr...@googlegroups.com. >> To view this discussion on the web visit >> https://groups.google.com/d/msgid/pestlist/CABPo27SY3rL_hRciVs_LsXrT2FgYVfJDXDRQM0gnFHg52xdxGQ%40mail.gmail.com >> . >> > > > -- > Jim Moss, Collections Manager > University of Michigan Museum of Anthropological Archaeology > Research Museums Center > 3600 Varsity Drive > Ann Arbor, MI 48108 > 734-615-8516 > jmm...@umich.edu > www.lsa.umich.edu/ummaa > > The University of Michigan is located on the traditional territory of the > Anishinaabe people. > In 1817, the Ojibwe, Odawa, and Bodewadami Nations made the largest single > gift to the early University, when they ceded land through the Treaty at > the Foot of the Rapids so that their children could be educated. > Through these words of acknowledgment, their contemporary and ancestral > ties to the land and their contributions to the University are renewed and > reaffirmed. > > -- > You received this message because you are subscribed to the Google Groups > "MuseumPests" group. > To unsubscribe from this group and stop receiving emails from it, send an > email to pestlist+unsubscr...@googlegroups.com. > To view this discussion on the web visit > https://groups.google.com/d/msgid/pestlist/CALMPW-Xk%3D%3D6RnirQfZkLHasKy49qJ_BP%2BBueQG0uXDDF-EV2wA%40mail.gmail.com > <https://groups.google.com/d/msgid/pestlist/CALMPW-Xk%3D%3D6RnirQfZkLHasKy49qJ_BP%2BBueQG0uXDDF-EV2wA%40mail.gmail.com?utm_medium=email&utm_source=footer> > . > -- You received this message because you are subscribed to the Google Groups "MuseumPests" group. 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