Mr. Heater 3800 BTU Indoor/Outdoor Little Buddy Propane Heater (6 Pack) - Walmart.com
Amazon.com: Mr. Heater Portable Big Buddy Propane Heater with 10-Feet Propane Hose Assembly and Propane Tank Refill Adapter Bundle - Propane Heater for outdoor & indoor use - 4,000, 9,000 or 18,000