U.S. Boiler Co.’s Alta Combi boiler, is a gas-adaptive combi-boiler with 10:1 turndown. The technology offers true “no touch” combustion setup with no manual throttle or offset adjustments. Engineered for 5-minute start-up, its control system provides continuous, automatic self-calibration of burner combustion by adapting to component wear, variations in fuel and environment, and vent air pressure. www.usboiler.net