ECO Tec Series 2 is Weil-McLain’s premium residential gas boiler. Connected with our ProTools app, it's designed to be easy to install and service, with a long-lasting firetube heat exchanger and our next generation, easy to use, color touchscreen control. The ECO Tec is also available in a combi version, generating hot water output up to 5.4 GPM, making it the first premium residential combi from the biggest name in boilers.