Compared across 2 stores. Prices are checked against each store and labelled with when. Store links may earn us a commission. Price via Klarna.
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The Rinnai RE140IN is an indoor-mount natural gas tankless water heater rated at 5.3 GPM and 140,000 BTU. It heats water on demand, so there is no storage tank to run out or keep warm. It suits one- to two-bathroom homes in mild climates, where its capacity covers a shower and a couple of fixtures at once. Against larger Rinnai models it gives up flow in cold weather, and against electric tankless units it needs gas and venting but delivers more hot water per minute.
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Lowest price we've seen: $795.69 on Nov 9 at Lowe's. Tracked across 2 stores since Nov 9.
Owners of Rinnai tankless units generally report steady hot water and few repairs, and the brand is well regarded by plumbers. The main complaints are the cost and complexity of installation and reduced output in cold weather.
