Michał Kaczorek and Michał Szyszkowski designed and constructed the benches in their workshop, set up in a backyard garage.
The benches are equipped with a sensor to measure particles in the air and light up red, yellow or green, depending on the amount of matter - red signifies a high amount, green for a low amount.
Kaczorek explained that after reacting physically to poor quality air, the miners decided to create a product that would make the measure of air quality visible at a glance.
The benches include a purifying system which can clean 860 cubic metres of air per hour - equivalent to the amount of air in a room which is 80 square metres in size (861 square foot).
A bench has already been installed in the city hall of the hometown of the miners, Jastrzębie-Zdrój, who have hopes of installing more across Poland including in airports, offices, hospitals and schools.
A 2016 World Health Organization (WHO) report found that 33 of the 50 most-polluted places in the European Union (EU) were in Poland, mostly in the country's south.
Currently, around 80 percent of Poland's power production is provided by coal-fired plant generation. It aims to cut that to half by 2040, with renewable energy and nuclear providing much of the rest and gas-fired generation providing back-up.
Autor: gf / Źródło: TVN24 News in English, Reuters