Wikipedia
Nunnanlahden Uuni Oy is a Finnish public limited company originating from Nunnanlahti in Northern Karelia. The company's main office is located at Juuka, a town near the city of Joensuu in Northeastern Finland. The company's subsidiary is NunnaUuni Oy. NunnaUuni Oy is known for its heat-preserving NunnaUuni fireplaces that the company produces from its own deposit of MammuttiStone, a soapstone material that has proved an excellent material for fireplaces.
Nunnanlahden Uuni Oy was founded in 1982 and the company began industrial production of heat-preserving fireplaces during the same year. At the beginning of 2007, the company handed over its production, sales and marketing functions to its subsidiary company, NunnaUuni Oy. At the moment, NunnaUuni Oy is the largest privately owned company in its field in Finland. The company has participated in numerous co-operational research projects and it also conducts research and product development on its own. Due to its research and product development efforts, the company has approximately 60 registered patents and 100 product models registered for protection.