Suggested Retail:$99. Dyna-Glo 50K-80K BTU Convection Propane Tower Portable Heater. The Dyna-Glo 80,000 BTU Portable Convection Tower Propane Heater can heat up to 600 sq. ft. and has a 360° heat radius to warm outdoor areas. The heater features a one-hand piezo ignition for easy, quick startup every time. An automatic shut off and large, non slip base helps provide safe use.. 7 DAY FULL REFUND GUARANTEE ON THIS ITEM IF ANY ISSUE IS FOUND THAT WAS NOT DESCRIBED/PICTURED. PAID DELIVERY AND 7 DAY ALTERNATE PICK-UP ALSO AVAILABLE. SEE NOTES TO BIDDER, IN AUCTION DETAILS, AT THE TOP OF PAGE 1 FOR MORE INFO.