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Takagi TK-510U-I N/A 10 GPM 199000 BTU 120 Volt Natural Gas/Liquid Propane Whole House Tankless Water Heater - FaucetDirect.com
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Takagi T-H3-DV-N Condensing High Efficiency Natural Gas Indoor Tankless Water Heater, 10-Gallon Per Minute, 199,000 BTU - Amazon.com
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Takagi TK-510C-NI 199,000 BTU Concentric Vent Indoor Non-Condensing Tankless Water Heater - Amazon.com
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