Available in seven sizes from 500 to 2000 MBH, Laars Pennant boilers/volume water heaters are fueled by natural or LP gas and deliver efficiency levels up to 85 percent, with stage firing of up to 4:1, and cascade with auto redundancy. The Pennant now has a substantial upgrade with its LAARS LINCTM Intuitive Control System, which includes an auto cascade setup feature that easily configures lead lagging of up to eight Pennants.