Question about Rheem Tankless Hot Water Heater Rtg-74pvp-2 7.4 Gpm

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Power vent tankless heater has a down draft

I have a richmond rmtg-74pvn and I have a problem with the cold down draft is blowing down the vent and freezing the water in the heating tubes.the damper in the top of the unit is functioning properly.

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I HAD THE SAME PROBLEM ON 2 OF THESE. I CALLED THE COMPANY AND THEY SENT ME A COMPLETE NEW VENT KIT WITH A DAMPER AT THE OUTSIDE WALL. HAVE HAD NO TROUBLE SINCE INSTALLING

Posted on Jan 25, 2010

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I got a dryer vent kit (Alum) took the extension pipe off and cut the center hole open a little and slid it over the existing elbow. Now when the heater turns on the little flap opens and when the air flow stops the flap closes stopping the air coming down the pipe.

Posted on Jan 16, 2009

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Install a backdraft damper which is like a check valve for vents. Make sure you use only Category III products.

Posted on Jun 10, 2009

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