https://www.energystar.gov/products/whole_home_tankless_gas_water_heaters
Whole Home Tankless Gas Water Heaters | ENERGY STAR
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https://www.hotwater.com/
Gas & Electric Water Heaters & Tankless Models | A. O. Smith
Find residential and commercial tankless models, hybrid heat pumps and storage tanks. Explore A. O. Smith's line of gas and electric water heaters.
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https://www.hotwater.com/residential/water-heaters/gas-tankless/
ProLine® Residential Gas Tankless Water Heaters | A. O. Smith
Save space and improve energy-efficiency with a ProLine® tankless gas water heater from A. O. Smith. Explore features and find the right model for your home.
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