Turn up the heat – anywhere and anytime – with Mr. Heater! The MH30T Tank-Top Heater is propane powered for outdoor use on loading docks, patios, construction sites and more. Features adjustable heat control, an instant ignitor, automatic shut-off and variable BTU's (8-28,000). Operate one or two burners at a time on a 1-20lb propane cylinder, sold separately.