The KN-10 is a gas-fired 1 million Btu boiler. The boiler uses a Tru-Flowâ„¢ control strategy to control the fuel-air mixture at all firing rates and venting conditions. The combustion air is measured constantly to fine-tune the gas flow through the gas valve. The unit's controls continuously monitor all interlocks and provide information through text display and intuitive diagnostics. The cast iron heat exchanger is rated at 100-psi working pressure. The boiler operates at full-rated input on gas pressures down to 2 inches water column. Features include 3:1 capacity modulation, sealed combustion direct vent, down-fired design for counterflow efficiency, and 0.1 percent standby losses. The unit has a footprint of less than 27 inches wide.
HydroTherm, 260 North Elm St., Westfield, MA 01085; 413-564-5515; www.hydrotherm.com.