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Worked first time. Installed easily. Natural Gas version. One person can lift and place on the wall. Not that heavy. Has a center slotted hanging point then multiple points to secure top and bottom.
Amazon shipped quickly. UPS delivered on time. 2 days.
Need: 1) 120v AC source. 1)3/4" Gas connection. 3/4" water connections.
I removed the sheet rock and installed a plywood back for mounting. Cost of change over: $300. Those fittings, flex hoses, and vent are expensive from Home Depot. They don't have the 3 X 5 heater vent pipes. 3" works fine. Did the install myself.
Will go to 140 deg must must read directions to set it. Nice to have the remote control. Will work with more than one remote. So you can set the temperature for what use. Very small, in relation to a tank. Cannot tell the difference between a tank an the tankless. I use one for the whole house.
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This unit started out great and then after one year started throwing error codes. I found out that " normal" maintenance on this thing is going to cost me an extra $200 $500 each year! According to Rheem (manufactuer of Richmond products) I need to have a Plumber come out twice a year and descale the unit and then about every year to year and a half I need to have it completely disassembled and the burners and ignightors cleaned. What a deal this thing turned out to be!Customer service said I could do it myself and sent me the 12 page instruction sheet for the cleaning of the burners. It involves removing the gas manifolds, control board, burner box, several gas lines, and then reassemble. It requires the removal of at least 50 different screws in very tight places. I am fairly handy at fixing thing and they told me it would take less than a hour. It took me 5! Only to find out the problem was in the control board.
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I previously owned a Takagi tankless hot water heater, which is amongst the best one can own. But, this unit most definately blows away the Takagi, and most other units. Installation is simple. The unit requires only a very low flow to start the heater which is super nice. It runs incredible quiet. It is a very small and compact unit, and, best of all, it will save you a ton of money. Rheem also makes an even higher efficiency unit, if you are interested. The construction of this unit is excellent. I highly recommend it.(BTW... I wouldn't pay too much attention to the reviewer who only gave the unit one star. If these units didn't work (as the reviewer said), then Rheem wouldn't sell them. I would imagine that the one star reviewer was probably a one star installer and that the unit they purchased was just fine. Otherwise, Rheem wouldn't have sent it back to Amazon.)
Honest reviews on Rheem RTG-84DVN Direct Vent Indoor Series Natural Gas 8.4 GPM
This was without a doubt, one of the worsy purchases that I have EVER made! Arrived defective and the manufacturer, Rheem, could not have cared less.They refused to replace the bad unit and kept sending plumbers out to touble shoot and fix. After the third plumber, I packed it up and sent it back to Amazon.Amazon was great! they took care of my out of pocket expenses and made me "whole". I will NEVER buy another Rheem product.Find helpful customer reviews and review ratings for Rheem RTG-84DVN Direct Vent Indoor Series Natural Gas 8.4 GPM
The Rheem 8.4GPM tankless hot water heater has a design flaw. Internal to the unit is an observation window used for determining if the burner is working properly. This window has a piece of glass which can fall out, allowing heat from the burner to damage internal components, rendering the unit inoperable. Unfortunately, Rheem will not cover the cost of this failure as they will most likely look for ways to classify the failure as "incorrect installation". In my experience, they did not like the vent termination assembly used, and disqualified any warranty regarding damage induced by the piece of glass falling out, which is wholly unrelated.
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