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You are here:
PureEnergySystems.com > Store > eNDO-THeRM

No Longer For Sale:
eNDO-THeRM Refrigeration Thermometer

This little gadget reads the temperature of the food, not the air in your fridge, so you can set the fridge to the optimal 40-41 degrees, both saving energy (typically 15%) and making the food last longer, giving you a very quick return on investment.  Also works for freezers.

Page Contents:
Description • Instructions • Ideal Temperatures • Purchase • Contact • See also


Keeping refrigerated/frozen food at too low temperature wastes electricity by making the refrigerator/freezer work harder than it needs to, whereas keeping the food too warm puts the food at risk. 

Use the eNDO-THeRM to correctly evaluate the exact temperature your refrigerator/freezer is actually keeping the food at correct temperature without risking food safety or wasting energy.

Every single degree you can raise your refrigeration air temperature (and still maintain the same and safe product temperature) gives you 3 ½ % Energy Savings!

Most people are keeping their refrigerators just above freezing, using the freezing of food as an indicator that it's too cold, and raising it just above that.  By raising the temperature six degrees by knowing what the food temperature is, to the more optimal 40-41 degrees, you will be saving around 15-18 % on electricity while also increasing the longevity of your food.


Place the eNDO-THeRM in a convenient position mid-shelf, allow 1-2 hours and read the eNDO-THeRM temperature. This gives the equivalent temperature of what the fridge will keep food at this location in the fridge. If necessary adjust the fridge’s thermostat and recheck after 2 hours, and repeat the process until desired levels are achieved.

Bear in mind that there are likely to be areas or "zones" in your fridge that are warmer, and some that are colder, typically in a range of 2-3 degrees F from low to high.  You might want to check different areas of your fridge to see where the warm and cold zones are, so you can put foods where they are suited.

Ideal Temperatures

Different types of food have different optimal temperatures.  Produce stores best at: 41-43ΊF, cheese stores best at 45ΊF, and milk stores best at 37-38ΊF.

Typically, people "over-refrigerate" setting the temperature much lower than it needs to be, and making the food not last as long.


Taking all things into consideration, the general optimal temperature for a home refrigerator is between 40 and 41ΊF.  Above that and you start getting into problems with spoilage.  Too much below that, and you start having problems with food not lasting as long.  So not only are you saving energy by elevating your temperature to 40-41 from a lower temperature, but you are also increasing the longevity of the food.

You definitely don't want to go below 33 degrees F otherwise you will freeze things.  But you don't want to get close to that either, as the close-to-freezing temperatures decrease longevity of the food, and are likely to create zones that go to freezing. 


  • Ice cream freezers: -5 degrees F.
  • Regular home freezers: 0 to +5 degrees F.


No Longer For Sale:
$64.95 including shipping

30-day money back guarantee


PES Network Inc
1022 E 920 S.
Ephraim, UT 84627

Phone: +1-801-407-1292  (Mountain time)
Toll-free: 1-877-PES-Wiki
fax: +1-801-880-8322

email: <orders {at} pureenergysystems.com>

See also

Page posted by Sterling D. Allan Feb. 15, 2009
Page last updated October 04, 2011

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