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Nightly & holiday HVAC shut off for sustainability? + advice on lending to museums that do this?

  • 1.  Nightly & holiday HVAC shut off for sustainability? + advice on lending to museums that do this?

    Posted 05-02-2024 12:03

    Dear Colleagues,

    My university museum recently considered a loan to another campus unit (also a collecting institution, but one without conservation staff) that shuts down their HVAC during all hours they are not open; basically, every night and over university holidays like winter and spring break, most federal holidays, etc. When we asked if they'd be willing to run their air handlers 24/7 while our RH sensitive item was being exhibited there, they said no - that it was too expensive and not environmentally sustainable. We declined to lend to them, at least this time for this object, but now we have a lot of questions. 

    • Do you know if other museums that house collections are doing this? (We have 24/7 HVAC at our museum.) 
    • If so, is this becoming more common? 
    • Is this practice considered sustainable? Are there data to support its benefits?* 
    • If you've dealt with this in lending, how are you mitigating risks? 

    Any other thoughts are also welcome.

    *The potential borrower has a large building with very big, high, open spaces like an atrium, auditorium, etc. When you look at the temperature and RH trend data for the those spaces, the swings in T and RH are massive, day to night, week to week - it gets really cold (not quite cold enough to freeze their pipes, so they must be sending a bit of heat in the winter...), really dry, really hot, really humid, etc., when their air handlers aren't running. Looking at the graphs, it's hard to imagine this practice is actually saving them energy and money, but maybe there are good general data that show this is indeed the case? 

    best wishes and thanks in advance for any insights you may be able to share (and if this has already been asked and answered, please just point me there),

    Suzanne



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    Suzanne Davis (she/her)
    President, AIC
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  • 2.  RE: Nightly & holiday HVAC shut off for sustainability? + advice on lending to museums that do this?

    Posted 05-06-2024 10:41

    Dear Suzanne, 


    Thank you for your question. We appreciate you coming to the Sustainability Forum. You have come to the right place. 


    In recent years, the AIC Sustainability Committee has focused much of its energy on generating content in a variety of forms on energy reduction practices that are safe for the preservation of cultural heritage. 


    Museums are among the highest carbon emitters in cities, sometimes even more than hospitals!  Nightly/weekend shutdowns are one such practice that can be used to lower energy usage and costs while allowing for environments that preserve art and heritage. This is not a new concept. Many institutions around the world have been using this strategy to lower their energy consumption. There have been studies showing how safe and effective shutdowns can be and many institutions around the world use this strategy or a similar one to lower their energy consumption. As was the case with this institution, sustainable actions can also provide the added benefit of dramatic cost reductions to institutions with tight budgets. And much work has been done on the efficacy and safety of these practices.  Of course, every building is unique, so the effectiveness of shutdowns depends on the building itself, and the nature of the collections it holds. We cannot speak to this institution in particular, though we do applaud them for taking a stand in the name of sustainability!


    We point you to the following resources:


    • International Climate Control Conference organized by Ki Culture fully available on YouTube Day 1 and Day 2

    • The Sustainability Committee's Green Tea podcast addresses this topic in our episode with Caitlin Southwick of Ki Culture. This episode addresses a Ki Culture program any institution can join to carefully tailor a more sustainable HVAC approach to their collection. 


    If you have any additional questions, please reach out to the Sustainability Committee aicsustainability@gmail.com.



    --
    Professional Associate, American Institute for Conservation
    Co-Chair, Sustainability Committee