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ECR International Inc. (ECR) has announced the addition of two floor-standing condensing boiler models, the MACF-150 and MAHF-125, that meet ENERGY STAR Most Efficient status. These combi and space heating boilers respectively are an extension of the company's current wall-hung MAC and MAH product families. Both models feature ECR's [AI] Control Technology. With this innovation, the boiler automatically calibrates with the touch of two buttons. The onboard combustion control recognizes natural or LP gas, then continuously monitors the flame signal and adjusts gas and air flow to optimize efficiency and fuel savings.