Waiwela/Paloma PH2-20RDVSLN Indoor Natural Gas Tankless Water Heater


Weight: 58.00 lbs

Commercial 185°F version:
Rush Order:

A 6.4 GPM tankless water heater for single-bathroom homes

The PH2-20RDVS is the perfect hot-water solution for average 1 bath homes. It can support one shower plus one small household application (like a sink) simultaneously. This unit requires a metal-fab 3"/5" concentric vent.

Except for the label, this heater is identical to the Rheem RTG-64DVLN. Paloma has owned Rheem since 1988.


• Low NOx burner
• High altitude capable
• Self diagnostic system
• 0.4 GPM Activation flow rate
• 0.26 GPM Minimum flow rate
• Freeze protection up to -30°F
• Accepts preheated water up to 140°F
• Optional upgrade available for output maximum of 185°F
• Residential & commercial applications
• Connect up to 20 units simultaneously
• Supports both vertical & horizontal venting
• Wired temperature remote control included
• Supplied 120V power cord with indoor direct vent models
• Integrated appliance adapter and condensate drain simplifies venting with indoor direct vent models


• Overheat limit wrap
• Anti-scald protection
• Flame failure monitor
• Temperature controller is adjustable to prevent scalding
• Flame rods ensure proper firing while detecting flame failure
• Resin film surrounding the combustion chamber for overheating detection
• Incomplete Combustion Avoidance Device (ICAD) monitors combustion for unsafe carbon monoxide


• Digital controller
• Endless hot water
• Diagnostic display
• Changes temperature settings precisely and instantly with the touch of a button


Model Number PH2-20RDVSLN
Installation Type Indoor - Sealed Combustion
Gas Type Natural Gas
Minimum BTU/Hour 11,000
Maximum BTU/Hour 150,000
Efficiency % 84%
Energy Factor (EF) 0.82
Minimum Water Flow .26 GPM
Activation Flow .4
Max Water Flow at 35ºF ∆T 6.4 GPM
Dimensions 25 5/8" High x 13 7/8" Wide x 8 7/8" Deep
Temperature Range ºF 100-140
Gas Connection 3/4" MNPT
Water Connection 3/4" MNPT
Inlet Gas Pressure (W.C.) Natural Gas: 4.5 - 10.5
Water Pressure PSI 14 - 150
Electrical Requirement 120V / 60 Hz AC / 2 Amps
Power Cord Installed No
Freeze Protection Yes - (-30ºF not including wind chill)
Digital Controller Yes - UMC-117 Main Controller
Electronic Manifold Ready Yes - with optional controller
DUOnex Ready Yes - with optional DUOnex cable
Venting N/A
Max Vent length N/A
High Altitude Capable Yes
Low Nox Compliant Yes
Approvals Energy Star - CSA - GAMA - NSF
Warranty 12 yrs. Heat Exchanger / 5 yrs. Parts / 1 yr. Labor



• 12 Year Warranty on Heat Exchanger
• 5 Year Warranty on Parts
• 1 Year Warranty on Service


• 5 Year Warranty on Heat Exchanger
• 5 Year Warranty on Parts
• 1 Year Warranty on Service


User Manual

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Average Customer Rating:

1 most useful customer reviews
Mar 21, 2016
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