> >How full the freezer and the quality of the seal make a huge difference. For -20 freezers, I recommend that if they are not full, to add water jugs. Bad seals on a -80 (or seals that are frosted) and misadjusted closing mechanisms can cause them to lose temperature very quickly.
In addition, these are well-known problems when trying to address energy consumption in laboratories.
-80 freezers use about the same amount of electrical energy as a house, but that number assumes that the freezers are well-maintained. Frosted or aging seals can increase freezer energy use significantly. For this reason, I suspect that the work you did in repairing/replacing seals and closing mechanisms paid for itself within months. Unfortunately, connecting those savings to the expenses which enable them is beyond the scope of most academic accounting systems.
Ralph Stuart, CIH, CCHO
Environmental Safety Manager
Keene State College
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