The A. O. Smith ProLine XE Combi Boiler delivers space heating and immediate hot water. The maker says the boiler offers easy installation, set-up, and maintenance, and has a user-friendly interface with a backlit LCD display. It’s available in 110,000, 150,000, and 199,999 Btu/hour models, delivering up to 4.8 gallons of hot water per minute—the highest capacity in the combination-boiler category, says the company. The boiler comes with a fiveyear parts and 10-year heat-exchanger limited warranty. Pricing is set by distributors. hotwater.com
A High-Efficiency Combination Boiler
