References

  1. http://emcsecurity.com/blog/tag/severe-cold-temperature-safety/
  2. https://www.ag.ndsu.edu/winterstorm/winter-storm-information-family-1/stalled...-ut-safe/heating-and-ventilation
  3. http://www.mayoclinic.org/diseases-conditions/hypothermia/basics/symptoms/con-20020453
  4. http://energy.gov/energysaver/portable-heaters
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