Navien NHW700-199AI-NG NHW-AI Compact Tankless Water Heater with Built-In Recirculation Pump & Buffer Tank
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$1,423.99at The House SupplierChecked Nov 14
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The Navien NHW700-199AI-NG is a compact indoor condensing tankless water heater with a recirculation pump and a small buffer tank built in. It modulates from 199,900 BTU/h down to 10,700 BTU/h, so it throttles back for small draws instead of firing at full power. It delivers 7.4 GPM at a 45°F rise and about 5.0 GPM at a 67°F rise, roughly two showers at once on a cold winter day. The built-in pump and buffer shorten the wait for hot water and smooth temperature swings, which sets it apart from bare tankless units that need separate recirculation hardware. It suits gas-heated homes with cold incoming water and households that want fast hot water at the tap.
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The Navien NHW700-199AI-NG is a compact tankless water heater from the NHW series, with a recirculation pump and buffer tank built in. It is designed for indoor installation and runs on natural gas. The built-in pump brings hot water to the far fixture without a long wait and without a second unit on the wall.
Input is rated from 10,700 to 199,900 BTU/h, and the unit modulates across that range, so it does not run at full fire to fill a sink. Minimum activation flow is 0.4 GPM. With a Navien recirculation setup, it also supports a low-flow activation option down to under 0.01 GPM.
Output is rated by temperature rise: 9.5 GPM at 35°F, 7.4 GPM at 45°F and 5.0 GPM at 67°F. The 67°F rating applies when incoming water is near 40°F. At that rating, the unit can supply roughly 2 showers at once with 2.5 GPM showerheads. This is a non-condensing unit and does not vent in PVC. Gas connection and venting must be done by a licensed installer.
