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Rheem RTGH-84DVLN-2 Indoor Natural Gas Condensing Tankless Water Heater Reviews

4.7 Rating 17 Reviews
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Rheem RTGH-84DVLN-2 Indoor Natural Gas 11,000 - 157,000 BTU Condensing Tankless Water Heater Rheem Prestige™ RTGH-84DVLN-2 is a high efficiency condensing natural gas tankless indoor water heater designed for endless hot water in 2 bathroom homes in colder climates - 3 bathroom homes in warmer climates. Save money and never run out of hot water with new and improved Rheem RTGH. Efficiency Up to .93 UEF -US Up to .96 EF - Canada With stainless steel condensing heat exchanger Performance For 2-3 bathroom homes – 8.4 gal./min. at 35°F rise, 6.6 gal./min. at 45°F rise Exclusive! Water Savings Setting – upon activation, this setting can save homeowners up to 1,100 gallons of water per year by decreasing the flow of water through the pipes until the temperature reaches the heater’s set temperature Industry Leading Low Flow Activation - Minimum flow rate of .26 GPM and minimum activation flow rate of .40 GPM ensures the user will receive hot water even in low demand situations Recirculation Pump Kit-Ready – Providing faster hot water at the tap and savings of up to 12,000 gallons water/year Exclusive! Hot Start Programming - Minimizes cold water bursts by staying in ready-fire state for back-to-back hot water needs Easy Installation and Service New! 2" Venting with band connections New! Vent up to 150 ft with 3" PVC and 60 ft with 2" PVC Built-in condensate neutralizer 1/2" Gas line compatibility up to 24 ft. Exclusive! Maintenance Notice Setting - Alerts homeowner, to call for service check (optional) Self-diagnostic system for easy installation and service High-altitude capability – up to 8,400 ft. elevation above sea level Digital remote control now pre-wired and 10 ft. of thermostat wire included Requires a 120-volt power cord (indoor models only) Technology EcoNet Enabled - all Tankless products from 2010 to present can connect to EcoNet mobile app via Tankless EcoNet Accessory Kit (REWRA630TWH) For higher demand application, easily link multiple tankless units to operate as one system: 2 Units: EZ Link Cable Up to 6 units: MIC-6 Control Board Up to 20 units: MIC-185 plus MICS-180 manifold control assembly Environmentally Friendly Low Emissions Ultra Low NOx burner meets SCAQMD rule 1146.2 requirements Safety Exclusive! Overheat Film Wrap - prevents dangerous temperatures and provides industry best side-to-side clearance of 1/2 inch Industry Best! Freeze protection to -30°F Temperature Rise and Flow 35° 45° 50° 60° 67° 70° 80° 90° 100° RTGH-84 Water Flow (GPM) 8.4 6.7 6.0 5.0 4.6 4.3 3.8 3.3 3.0 Spec Sheet Brochure and Features Save Money Shopping Online, and Buy with Confidence When you buy your money and energy saving high efficiency natural gas indoor Rheem instant on and endless hot, tankless on-demand condensing water heater from us, you get a brand new unit, at the best possible price, with Rheem’s amazing 5 year parts, 12-year heat exchange and 1-year labor warranty. Our innovative partnership with Rheem cuts out the middle man and eliminates the high operating costs of traditional brick and mortar big box stores. These savings get passed directly to you, allowing us to offer brand new money, energy and space saving Rheem high efficiency condensing tankless instant on and endless hot natural gas indoor water heaters, at the best possible everyday cheap discount online sales prices. If you have any questions give us a call or send us an email and one of our tankless water heating experts will be happy to help. In Stock Ready to Ship Note: We have a special sale on this unit that will not last. Order now and save!

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Arthur Brownell
Verified Reviewer
“Since I did the installation myself, (I was replacing an old leaking 40 gallon water heater), and had never taken on a project quite this extensive, plus have minimal experience on the plumbing end, it did take me quite a bit longer than a true professional. But, with the help of YouTube videos, (I'm YouTube handy), and plenty of gumption I did end up with a pretty good installation, (thank god for Shark Bite fittings and Plex-A piping). Since then, after too many cold showers while I worked on the install I have great hot water and couldn't be more pleased with the unit you sent me. I highly recommend your service and Rheem tankless water heaters.”
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Posted 1 month ago
Charles S Mitchell
Verified Reviewer
“So far, so good. Winter will be the test, when the unit will be sending hot water to the HVAC air handler that heats the small apartment in which it is installed.”
Helpful Report
Posted 4 years ago
Hi Charles, thank you for your business and your review. You are welcome of course to use the unit you bought in anyway you want. However, we need to let people reading this know the unit you bought the RTGH-84DLN-2 is a standards tankless water heater for domestic hot water only. It is not a boiler, and it is not a combi tankless water heater boiler. It is not made to provide hydronic radiant heat. Doing so voids the warranty. It is for showers, baths, sinks and so on only. There are combination tankless water heater boilers that provide both domestic hot water and radiant heat. These units from Rheem start RCBH and can be found in the Combi Water Heater Boilers section of our website.
Posted 4 years ago
“The heater works great and performs really well. It is energy efficient model so that save energy cost.”
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Posted 4 years ago
“In use for over a year with no problems. Only basic maintenance needed. We saw a slight decrease in the gas bill, but we use it hard. Unlimited hot showers!!!”
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Posted 5 years ago
Richard Marriott
Verified Reviewer
“Being the first one I’ve owned I wasn’t sure. But it works great was super easy to mount and hook up and it works great”
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Posted 5 years ago
Author didn't leave any comments.
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Posted 5 years ago
“It was a little tricky to install and our contractor had to buy venting parts extra after consulting with Rheem. But it has been working great for 2 months and no issues with hot water. It takes about 30-40 seconds to get your hot water and the best part is setting the temperature to 112* and just turn the hot all the way to max. No struggling to find the right temperature. We also saved in space by 10 inches in our utility closet.”
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Posted 6 years ago
John Morrison
Verified Reviewer
“I didn't research Tankless vs Tank enough. Mistakenly I went with the headlines that declared water and energy savings. It takes much longer for me to see hot water in the shower than it did previously. I will also spend much more time with the annual de-scaling process required to maintain the tankless. Horribly disappointed.”
Helpful Report
Posted 6 years ago
I am sorry to hear that, however, it is not possible for it to take more time to get hot water with tankless than a tank. The water coming out of the tankless is instantly hot. When you are waiting for hot water this has nothing to do with the water heater and everything to do with the water in the pipes that has sat and cooled from the previous use. If you are 20 ft away from the water heater and have 2 gallons of water that has sat and cooled in the pipes you have to of course wait for the hot water coming from the water heater to travel that distance and the cooled water that is between you and the water to flow through. If you have a standard 2 gallon per minute shower head then it would of course take one minute before you have hot water. If you want instant hot water at the tap or shower you will need a recirculation pump. I will include a link below to that section of the site, but they recirculate the water so that you do not have cold water left in your pipes from the previous use. In regards to descaling the unit it is true that tankless water heaters heat the water you are using as you are using it with a heating element that is in direct contact with the water, so over time calcium and other dissolved solids builds up and creates what is called scale that needs to be flushed out. Typically this is done every year to 18 months. However, this is a very simple process that takes just a few minutes. The Rheem units controllers will let you know when scale is starting to build up and needs to be flushed out. I included a link to a video below as well as to a flush kit. That all said tankless water heaters save a ton of energy, provide endless hot water, and are much more compact and mount on the wall opening up a good bit of extra space. https://www.tanklesswaterheaterdepot.com/tankless-water-heater-recirculation-pump-kits-and-accessories https://www.tanklesswaterheaterdepot.com/tankless-water-heater-descaling-kit https://youtu.be/St38CFhiaI0
Posted 6 years ago