Mr. Heater Big Buddy Indoor/Outdoor Propane Heater 18,000 BTU, Model# MH18B

Up to 108 hours of use
CSA certified
Uses one or two 1-lb. or one 20-lb. propane tank (propane not included) with optional hose connections (Items 173645, 173646)
Blower fan uses A/C adapter (Item# 172641, sold separately) or 4 D-cell batteries (not included)
Minimum tank size: 1 lb.