RHEEM RTGH-84DVLN-2 Natural Gas Condensing Tankless Water Heater, Silver , Gray

I purchased this water heater from Silver State Manuals as a returned/dented item. I had previously purchased an inexpensive unit from eBay and it was just total junk. I guess my first clue should have been when the shipping weight of the previous eBay unit was 29 pounds and the Rheem unit weighs in at 74 pounds.Installation was straightforward, but the control unit displayed an error and the unit would not start up. I contacted Rheem, and they were very helpful in troubleshooting and solving my issue. It seems the unit was in a locked status, probably due to being turned on before the venting was properly installed. The tech stated that happens a lot. Make sure you have it completely ready to go before you turn it on! I assume the previous purchaser must have done that and the unit locked. Seeing the dented case, that is probably why it was returned. The damage was all superficial, the internal frame and quality of the unit is great and nothing was damaged internally.After executing the reset procedure, the unit started right up and works perfectly! I was surprised at how quiet the unit is and it does heat up instantly.I believe I am going to be very pleased with this water heater and recommend you spend the money for a quality heater as the cheap models available just are not worth the headache!

So there were limited reviews on this and wanted to throw mine out there as I know reviews are important especially expensive products like this. So I have a 1000SF house with a washer, dishwasher, kitchen sink, and 1 bathroom. I can't really say if all these were running at the same time whether the hot water would run out, but most people don't so there's that. I can say that it get's up to 120 degress max. It might get more. as I hadn't fully explored the system, but out of the box that's it's max. I believe it could go higher, just not sure. There is never a time using this that I run out of hot water, say using the shower. My girlfriend, she's so great haha has taken almost 50min showers and she put's it on almost all hot, barley any cold mix. So it last that long. Watch YouTube videos you would think that you would get hot water in 10 seconds or less but that's not the case. It creates hot water immediately from the unit, but that water has to travel the line. I didn't have much of a choice of where the unit was placed, hence it's far away from the bathroom and kitchen. I'd say it has to run 50LF+ of line. So it takes maybe a good 20 to 30 seconds before you get the hot water. Anyways, I think it's great and has saved a little on my bills. I have it placed in my crawlspace. as it is dug out, which is unconventional for a crawlspace, so it's almost like a basement, but of dirt. I have it drawing air inside there, and not outside the house. I have had no problems doing that, so I didn't have to drill a hole to route the pipe outside the house to draw air into the unit.

I purchased this unit to conserve space and energy. It was installed by an expert plumber. It worked fine for the first 5-6 months. Then, it would intermittently give me an error code 12. The manual was not helpful in resolving this issue. After a couple of more months, it started giving this error code very regularly. I made a warranty claim. The person they sent to diagnose and repair had no idea what he was doing, and simply was on call with the company to determine the issue. Frankly, this is something I could have done myself. Anyways, I was told that the reason for the error code was that the gas pressure was too high. I called the gas company and they shut the gas line down because they were worried. When the gas company checked the pressure, it was actually in line with what the gas company emits, and within the limits of what is required by the unit. I called Rheem again to make a warranty claim. They sent the same person out to diagnose and repair, and this person now admitted that his manometer (gas pressure checker) was maybe off by 1 W.C. He then cleaned the flame rods and they ordered new flame rods as these experts now determined that this may be the issue. After he left, there was now a gas leak. So, instead of fixing the issue, he created another issue. I called Rheem again, and they said that the unit should not be used until they can send someone out to properly diagnose. I was without hot water for 2 days, and we have two little kids that need baths, amongst other things we need to wash. When I called Rheem again, they basically stated that I just need to wait until they go through their diagnostics again, and that I just have to deal with it. This is absolutely the worst customer service experience I have ever had. I was forced to call the company they sent for repairs, and I forced their hands with legal threats to come and fix the gas leak. They confirmed that the cause of the leak was a bad gasket. It now has a temporary fix, but will require another new part. So, this whole issue has yet to be resolved after more than 2 weeks of dealing with it.Further, when the weather was cold in my area (single digits), the condensation line froze. The unit would no longer work. Again, when I called Rheem, they basically said I just have to wait it out and deal with it. At that time, I had a pregnant wife and daughter who had Covid and the flu. Their response was simply unbelievable.If you want constant problems and to be left high and dry when you most need help, then buy this product. I am never buying a Rheem product again, and I have half a mind to file a lawsuit against this company.