The Pennant line of fan-assisted, modular boilers and volume water heaters from LAARS Heating Systems are available in seven sizes from 500 to 2,000 mBh. They 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. Systems also qualify as low-NOx emission-rated, below 10 ppm. They include the LINCTM intuitive control system with an auto cascade setup feature that easily configures lead lagging of up to eight units. The color touch-screen homepage displays key boiler performance measurements, easy-to-use and -navigate control structure, USB input, easily connects to building automation systems via BACnet and a quick start option. Units can be vented from the top, or back, and can be installed indoors or out and racked on top of each other for up to 4,000 mBh in a small footprint. 800-900-9276; www.laars.com.