The flame in this Lava Heat patio heater is contained in a specially designed glass tube made from Borosilicate Glass that can produce an astounding 61,000 BTU (Hot Stuff!).

A statement of style - the Lava Heat flame is contained in a specially designed glass tube made from Borosilicate Glass that can produce an astounding 61,000 BTU (Hot Stuff!). Comes with 10 year warranty.