Final productjtl.jpg
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Authors John Looney
Completed 2013
Made Yes
Replicated No
Cost USD 10
OKH Manifest Download
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Bill of materials Easy Retained Heat cooker#Bill of materials
Hardware license CERN-OHL-S
Certifications Start OSHWA certification

The following is a step by step guide to building a retained heat cooker that was designed for the purpose of the Jefferson Community Center workshop 2013

Bill of materials[edit | edit source]

  • 1 Cardboard Produce Box
  • 1 Roll of Aluminum Foil
  • Duct tape
  • Paper (newspaper is preferred)
  • 1 Mylar emergency blanket
  • Scissors

Building Instructions[edit | edit source]

This is an easy process using less than 10 dollars worth of materials

Figure 1: Cardboard box is lined with paper

Line the main box with paper

Figure 2: be sure to allow the foil to drape over sides of box

Line the cardboard box with aluminum foil

Figure 3: Mylar Blanket

Line the Box with a Mylar emergency blanket, be sure to reduce the number of air pockets.

Figure 4: the final cooker

Repeat steps 1 and 2 with the lid of the box

Figure 5: You're Done!

The cooker is now complete! For use just place some blankets and towels inside, and seal a cooking pot in the cooker.

Use[edit | edit source]

The cooker is easy to use. Bring a meal to the proper temperature and leave it there for at least 2 minutes, then seal it in the box. Leave it in the box until cooking is completed. It should be noted that recipes using this method require less spicing and usually 50% more time to cook, so plan accordingly.

Maintenance and tips[edit | edit source]

  • Clean your cooker between each use.
  • Be sure to wash all blankets and towels used in the cooking process
  • Do not leave your cooker in areas where it could get wet.
  • Always ensure that your food is fully cooked before consuming
  • Experiment with new recipes! Stews and soups work well with this method.
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Keywords aluminum foil, cardboard box, retained heat cooker, aluminum, cardboard, mylar blanket, newspaper
SDG SDG02 Zero hunger, SDG08 Decent work and economic growth
Authors John Looney
License CC-BY-SA-3.0
Organizations Category:Engr305 Appropriate Technology, Cal Poly Humboldt, Jefferson Community Center
Language English (en)
Related 0 subpages, 2 pages link here
Impact 337 page views
Created May 10, 2013 by John Looney
Modified January 29, 2024 by StandardWikitext bot
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