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Rheem RTGH-84DVLN 8.4 GPM Direct Vent Tankless Water Heater (NG)

  • Rheem RTGH-84DVLN 8.4 GPM Direct Vent Tankless Water Heater (NG)
This item ships freight. Need a liftgate? Details.

Freight Orders

Freight deliveries require a delivery time be scheduled and someone must be present at the time of delivery to inspect and sign for the merchandise. A representative from the freight carrier will call the phone number entered at checkout to schedule the delivery.

Liftgate Service

For freight deliveries, you have the option of adding a liftgate to your delivery. A liftgate is the device that lowers a product from the truck to ground level.

CPO recommends adding liftgate service for freight deliveries exceeding 100 lbs if you do not have a loading dock or fork lift at the delivery address. Additional charges may apply. The liftgate option will be presented during the checkout process.

Please note that liftgate service only ensures the product is removed from the truck. We recommend you have the additional help of two to four people to move the product to its desired location because drivers are not required to assist.

Requesting liftgate service after ordering may result in additional charges and delays.

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Product Overview

Additional Information


  • 7.4 GPM at a 45 degrees F temperature rise (up to 9.5 GPM at 35 degrees F)
  • 3 in/5 in. Concentric Vent System with Integrated Condensate Collector connects to Metal Fab Inc., 3 in/5 in. Concentric Venting without an adapter
  • Next generation burner technology
  • Exclusive! Guardian OFW overheat film wrap
  • Digital display on thermostat shows temperature setting and maintenance/error codes
  • Environmentally friendly Low NOx burner meets SCAQMD rule 1146 requirements
  • Built-in electric blower to force exhaust gas to the outside
  • Supplied with a 12V power cord
  • Industry best .26 GPM minimum flow rate, .40 GPM minimum activation flow rate
  • EZ-Link cable connects two like units to operate as one, doubling capacity - now available for high demand applications (cable not included)
  • Manifold up to 6 units with an optional MIC-6 manifold control board
  • High altitude chip is required for installation above 9840 ft. (chip not included with unit)
  • CPO recommends that appliances be installed by a licensed professional.
  • 8.4 GPM Direct Vent Tankless Water Heater (NG) - RTGH-84DVLN


Application: Outdoor
Flow Rate At 35 Degree F Rise: 8.4 GPM
Flow Rate At 45 Degree F Rise: 6.7 GPM
Flow Rate At 77 Degree F Rise: 3.9 GPM
Gas Input BTU / Hr.: 11,000 - 157,000
Gas Type: Natural Gas
Ignition: Electronic
Minimum Flow To Activate: 0.40 GPM



5.0 / 5.0
4 Reviews
5 Stars
4 Stars
3 Stars
2 Stars
1 Star
Would you recommend?
Yes (4)
Yes, I would recommend this to a friend
"what are you waiting for?"
up and running,cut electric use,and saving $$$$
Great salesmen*****
January 30, 2014
Yes, I would recommend this to a friend
easy installation for updated water heater
Installation was very predictable. More plumbing with valve set which should probably be used in all installations. Required 3/4 in gas line. Venting was a bit more involved that standard water heater but only required another hour or so with running intake and exhaust w PVC. All in all not too difficult just think your way thru it before installing. First unit arrived dented in a torn box but CPO shipped a replacement within an hour of the 1st unit being dropped off for return at UPS.
July 21, 2015
Yes, I would recommend this to a friend
Awesome product and good price
Super efficient and cost saving product.
October 8, 2015
Yes, I would recommend this to a friend
Love this thig!!!
Although this is a good size water flow producing unit (84 series), i wouldnt try a smaller model.
Showers dont use much flow bathtubs do tho.

I love it, i no longer need to schedule clothes washing, as this hot water is continuous. A water tank needs to heat up again, but not this unit.

This (H) model dose not use a chimney, but rather a vent.
This style is nessesary when using a High Efficiency furnance, as in my reagion a hot water heater cant be connected to a chimnly, unless a furnace is also connected to that same chimney.
Most fumes arnt hot enough to escape the chimney with out a furnace, and will make the chimney fall apart.
March 29, 2016

Questions & Answers

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Browse 4 questions Browse 4 questions and 6 answers
Picture shows intake & exhaust PVC of newer model Rheem RTGH-84DVN Condensing Tankless Water Heater. Specs. say it takes 3" x 5" concentric vent older model Rheem RTGH-84DVLN. Please confirm what it is.
Randy on Mar 22, 2015
BEST ANSWER: The correct venting for model RTGH-84dvln is the 2 piece system designed for PVC pipe, not the 3 x 5 concentric.
What is the overall size of this unite? width, height, depth... Thank You
Frank on Oct 4, 2014
BEST ANSWER: This water heater's dimensions are 14 x 10 x 26 inches.
For intake the recommendations is a 3" PVC to external source. I have a 96% efficient furnace that also uses PVC intake and exhaust (4") the intake is internal to the house, the area where the furnace and water heater are located has a 6 in pipe from the outside that is always open, is it acceptable to plumb the intake internally like the furnace, the exhaust would still be run as per specifications externally.
Myke on Jan 3, 2016
BEST ANSWER: For assistance with installation, we recommend contacting an local licensed installer or contacting Rheem's technical support at 1-866-720-2076.
When will this product be back in stock?
johnr on Mar 9, 2015
BEST ANSWER: This item is expected to be back in stock on 3/11/2015