Rheem RTG-64XLN 6.4 GPM Low NOx Outdoor Tankless Natural Gas Water heater | Review

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Rheem RTG-64XLN Main features

Rheem RTG comes with several beneficial and advantageous features that are in sync with the modern day requirements.

1. Outdoor tankless water heater

Rheem RTG-64XLN is an outdoor heater that is solely used for outdoor usage. The advanced water heater provides regular supply of water heater that helps meeting the daily requirements in a household. Installation is the most important part of this water heater type. It needs to be installed outdoor with proper care and attention otherwise, it will not be able to function to the full of its efficiency.

2. Advanced technology

Another important feature of Rheem RTG-64XLN is its advanced and efficient technology that enables proper function of the tankless water heaters without any sort of disruption. It comes with a next generation burner technology that meets with the current day requirements. The Rheem model offers 5.6 GPM at a 45 degrees F temperature rise that is up to 6.4 GPM at 35 degrees F. It comes with a 3-in x 5-in Concentric Vent System with Integrated Condensate collector and 3-in x 5-in Concentric Venting in case there is no adapter.

3. Compact and portable

Rheem RTG-64XLN does not put unnecessary burden or space constraint problems on the users. The model is sleek, efficient and attractive. As it is a tankless water heater model, it has a sleek appearance and does not take away your valued space much. Another interesting aspect about the tankless water heater is that it is easy to use and portable. It is perfect for outdoor usage. It also comes with UMC-117 remote control and also 10-Feet of thermostat wire that is included in the package.

4. Energy efficient

The tankless water heater comes across as an energy efficient, effective heater model. Its new and innovative design makes sure to save not only a lot of space but it also turns out to be highly energy efficient. Rheem RTG-64XLN requires a gas input of 11,000 – 150,000 BTU / Hr and makes use of Natural gas for fueling purpose. The flow rate of water heater is excellent and assures to provide for continuous supply of hot water for homes with 1 to 2 bathrooms.


Rheem RTG-64XLN 6.4 GPM Low NOx Outdoor Tankless Natural Gas Water heater has got some disadvantages as well. It does not come with a valve to support high temperature and pressure relief which causes some discomfort in the usage. Another problem with the tankless water heater model is with its exhaust and vent system. These two are the major disadvantages when it comes to this tankless water heater models.

Customer Reviews

Rheem RTG-64XLN 6.4 GPM Low NOx Outdoor Tankless Natural Gas Water heater enjoys a good review overall. Users find the tankless water heater easy to install and convenient to use. It is known to work better than the previous model and comes with various beneficial features. The heater turns out to be a portable and convenient outdoor water heater. The heater needs some attention in the exhaust and venting areas and customers need some time to adapt to its system. 

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