Hero Forced Air Propane Heater, 30,000 - 60,000 BT - Mr. Heater

Features and Benefits:

• Quiet, powerful, cordless
• Heats up to 1,250 sq. ft.
• Runs up to 4 hours on single rechargeable battery
• Runs up to 14 hours on a 20 lb. propane tank on low setting
• QBT - 50% quieter than a standard propane heater

Ships with 1 internal battery (4 hrs), second battery can be added to extend runtime additional 4 hrs (8 hrs total).  Operates while charging - recharges 1 battery in 3 hours., two at 6 hours.  Electronic Ignition, ETL Certified.