AO Smith BTH Cyclone high efficiency gas water heaters can now be common vented. AOSmith has developed a common vent kit for venting two BTH-120, BTH-150, BTH-199, BTH-250, BTH-300, BTH-400, or BTH-500 water heaters. Please visit AOSmith's website at www.hotwater.com, email us, or call for more information.
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The CALL button uses the click-to-call feature which opens your phone's keypad automatically.