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Commercial tankless gas water heater

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Rheem Commercial tankless gas water heater Commercial Tankless System – Wall Mounted

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Rheem Commercial water heating Commercial tankless gas water heater Repair, maintenance, and replacement planning
Rheem Commercial Tankless System – Wall Mounted product image

Technical Specifications

Product Specs

  • 95 - 96% Thermal Efficiency
  • Standard Max High Temperature 185ºF
  • Manifold Control Models link up to 20 units
  • Common Venting Compatible
  • Service valves included
  • 199, 000 BTU/h
  • Commercial Project Sizing Available
  • SKU: RTR-WM220XLP
  • Model: Commercial Tankless System – Wall Mounted
  • Fuel: Propane Gas
  • Official SKU example: RTR-WM220XLP
  • Official product category: Commercial tankless gas water heater
  • Brand: Rheem
  • Model or series: Commercial Tankless System – Wall Mounted
  • Equipment type: Commercial tankless gas water heater
  • Product group: Commercial water heating
  • System role: Water-heating equipment for domestic or commercial hot-water loads
  • Application: Commercial, light-commercial, or managed-building HVAC and water-heating applications
  • Compatibility check: Verify fuel type, venting, electrical requirements, capacity, controls, and installation clearances.
  • Verified source: rheem.com

Useful troubleshooting details

  • Confirm the exact Rheem model or SKU, serial number, equipment age, and installation location before scheduling service.
  • Share photos of the data plate, equipment cabinet, nearby controls, access area, and any visible leaks, ice, alerts, or error codes.
  • For water-heating equipment, note hot-water symptoms, temperature swings, pressure concerns, venting, condensate, scale, and maintenance history.
  • Imported official SKU example: RTR-WM220XLP.

Service planning

How GreenFlow handles Commercial Tankless System – Wall Mounted requests

1

Identify the equipment

Confirm the model or series name, serial number if available, photos, and whether the unit is roof, exterior, basement, or mechanical-room equipment.

2

Describe the service issue

Share no heat, no cooling, weak airflow, error codes, alarms, leaks, noise, control problems, or comfort complaints.

3

Review access and history

Include access notes, tenant or business-hour constraints, filter status, recent repairs, and maintenance records when available.

4

Plan the next step

GreenFlow can route the request for diagnostics, repair planning, maintenance, replacement scope, or related system upgrades.

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Our Happy Customers

Jack B.

Andrey always does a great job.

Sharad W.

Green Flow and the people who work there are terrific. Vlad and Andre are excellent. Andre was very helpful. He was punctual, respectful, efficient and knowledgeable. He did not try to sell me something I didn’t need ( as others have done before). I was charged $99 which...

Ray

Just had a service call because my tankless water heater stopped working with E110 code. Andrey located the root cause real quick and fixed the issue within half an hour, also gave reasonable recommendations for further maintenance.

Randy J.

Thanks to Andrey for an amazingly quick response to my request for a service call. He diagnosed and fixed my issue within 24 hours of my asking for help. Excellent service. Thanks.

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