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The Rheem RTG Series is an indoor, wall-mounted tankless water heater rated at 180,000 BTU and up to 8.4 GPM, so it can run several hot-water fixtures at once. It heats on demand, has a digital control panel for setting the outlet temperature, and is built to low-NOx standards. It suits households replacing a tank unit that want endless hot water and floor space back. Against smaller tankless units it offers more flow, but it needs a large gas line and proper venting, and it is not a condensing design, so it is less efficient than condensing rivals.
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Availability unknownSold by efaucets (99.7% positive, 3,400 ratings)Returns: Set by the eBay seller; the eBay Money Back Guarantee covers an item that doesn't arrive or isn't as described.
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Lowest price we've seen: $791.69 on Nov 9 at Amazon. Tracked across 4 stores since Nov 9.
Owners of Rheem RTG tankless units generally report steady hot water and easy temperature setting, while installers note the venting and gas-line requirements. Complaints center on cold-water sandwiching at low flow and the cost of professional installation.
The Rheem RTG Series is an indoor tankless water heater. It heats water on demand, so it only runs when hot water is needed instead of keeping a tank heated.
The compact unit mounts on a wall, which saves space indoors. A digital control panel sets the temperature. The heater is designed for quiet operation and low nitrogen oxide (NOx) emissions.
