Tankless propane water heaters surpass electric heat pump water heaters in terms of hot-water delivery rates, installation requirements, carbon dioxide emissions, economics and its energy source, according to a report by Newport Partners and the Propane Education & Research Council. Propane water heaters produce 33% lower CO2 emissions and deliver three times more hot water than electric HPWHs, the report states. Tankless propane heaters are also more convenient and cheaper to install, the report adds.

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