Final productjtl.jpg
Project data
Authors John Looney
Completed 2013
Made? Yes
Replicated? No
Cost USD 10
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Device data
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.
Page data
Type Project, Device
Keywords aluminum foil, cardboard box, retained heat cooker, aluminum, cardboard, mylar blanket, newspaper
SDG Sustainable Development Goals SDG02 Zero hunger, SDG08 Decent work and economic growth
Authors John Looney, Kathy Nativi
Published 2013
License CC-BY-SA-3.0
Affiliations Category:Engr305 Appropriate Technology, Cal Poly Humboldt, Jefferson Community Center
Language English (en)
Impact Number of views to this page and its redirects. Updated once a month. Views by admins and bots are not counted. Multiple views during the same session are counted as one. 157
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