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Paloma PH2-20ROF

High Volume Outdoor Gas Tankless Water Heater with Remote Temperature Control.

The PH2-20ROF will support up to 2 major hot water functions in a warm climate, but is not recommended for installation in climates where freezing is possible.

SKU: PH2-20ROF + UMC-117

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Availability: In stock


Paloma PH2-20ROF

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Federal Tax Credit, Energy Star, Multi Unit Ready, DuoNex Connector, ICAD CO Safety


The PH2-20ROF will support up to 2 major hot water functions in a warm climate, but is not recommended for installation in climates where freezing is possible.

Hot Water Performance Map

Hot Water Performance Map
Temperature Rise (°F)
35 45 50 60 70 77 80 90 100
Gallons Per Minute
6.4 5.6 5.1 4.2 3.6 3.3 3.2 2.8 2.5
Gallons Per Hour
384 336 306 252 216 198 192 168 150
Above estimates are for sizing purposes only.


  • Endless hot water on demand
  • Energy efficient design heats water only when needed for low cost operation
  • Compact Size: At 54lbs, wall-mounted units save floor space
  • Temperature remote control included — simple to set precise water temperature
  • Built-in diagnostics & usage records make Paloma/WaiWela units serviceable
  • High altitude capable up to 9,840ft. No programming chip required.
  • Required 120V power cord included

Included Accessories

One main remote control (UMC-117) comes with each unit. Up to three remote controls (one main control and two bath remote controls) can be installed together.


  • 12 Year warranty on heat exchanger
  • 5 Year warranty on parts
  • 1 Year warranty on service

*For residential applications. Commercial warranty is 5 year, 5 year, 1 year 

Safety Features

  • Paloma’s exclusive sensing burner and ICAD Safety System to optimize combustion and shut down the unit in case of raised levels of carbon monoxide (on all indoor and direct vent units only)
  • Exclusive film wrap overheat limiter
  • Flame failure safety device
  • Anti-Scald protection

Energy Star

These Paloma/WaiWela residential Tankless Water Heaters are Energy Star® qualified. Products with the Energy Star® label are the most energy efficient choices you can make as a consumer. Paloma is a partner with Energy Star®.

Energy Star® was developed by the US Environmental Protection Agency (EPA) and the US Department of Energy (DOE) to reduce energy use and air pollution by labeling energy-efficient, cost-saving products used in homes and offices.

Products awarded the Energy Star® label significantly enhance energy savings while providing a healthy environment. By participating in Energy Star®, Paloma/WaiWela is helping to differentiate between standard-efficiency and high-efficiency products. Using these products helps you save money on your utility bills and works to protect the environment by conserving energy. Some models only qualify in specific matched systems.

When you buy an Energy Star® labeled tankless water heater from Paloma/WaiWela, you are acquiring a product that is in the top 25% for efficiency. Depending on the age of your existing equipment, you can save from 15%-40% on your utility bills by choosing an Energy Star® qualified product from Paloma/WaiWela.

For more information about Energy Star®, visit their website at www.EnergyStar.gov.


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