Safe Drinking Water


Preventable, water-borne diseases remain a major health problem worldwide. Millions of people boil their water over smoky, inefficient traditional wood cookstoves to avoid water-borne illnesses, while millions more are not able to treat their water at all, leading to the deaths of over 1.8 million children annually, according to the World Health Organization.

InStove has partnered with Oregon State University to refine and finalize a portable, affordable water pasteurization technology originally created by InStove co-founder Damon Ogle. Unlike most chemical or filter-based water treatment systems, the “InStove Water Purifier” requires minimal maintenance, resupply, and operator training. Compared to boiling, the Purifier requires about 97% less fuel when powered by a fuel-efficient InStove.

Who it's designed for

The Water Purifier is meant for institutions and organizations that provide drinking water for large numbers of people – enough to use the 400+ Liters of safe water the Purifier can produce each hour. Key applications include disaster relief and low-resource schools, hospitals, orphanages, etc., where small, sustainable firewood is an economical and available fuel.

How it works

The InStove Water Purifier destroys microorganisms by heating water to the pasteurization temperature of 71ºC, which is automatically controlled by an all-mechanical, fail-safe valve. The continuous-flow design also features a heat exchanger that allows for the recovery and reuse most of the energy from outgoing water, simultaneously increasing efficiency and cooling treated water to a safe temperature for immediate consumption or storage.


Key performance data

  • Flow rate: More than 6 Liters per minute – about as much as a kitchen tap.
  • Fuel consumption: Less than 6 grams of wood per liter – equivalent to the weight of one pencil.
  • Kill rate: Greater than 99.9999% of all harmful bacteria.



Field testing in Uganda with OSU team
Field testing in Uganda with OSU team

We plan to release the unit for sale in East Africa in mid-2018 after final field testing of the Purifier system, led by our partners at Oregon State University, is complete.