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50 Eco-Friendly Products Selected by Green Builder's Editors



Designed for smaller residential applications with up to 1.5 baths, the E50C touts the highest efficiency of any combi boiler on the market: 95.6 percent AFUE. With an input range of 13,600 to 50,000 Btu, this new boiler can be fueled by natural gas or propane, and is wall-mounted to save space. All Rinnai E Series boilers feature a high-performing, durable, stainless-steel heat exchanger, and comply with low-NOx requirements.

Rinnai E50C condensing combi boiler

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