Extend your patio and tent use through the cooler seasons with portable radiant heaters. The Zubri Z1-12 patio heater heats approximately a 10 foot radius around the heater and produces about 40,000 BTU. No tools are necessary to assemble. Stores away in its own hard-shell carrying case. Utilizes a 20 pound propane tank, which lasts for around 8 hours on full heat. These heaters can be used indoors in a well ventilated space, such as a garage with the door open, or a tent.