Green Flow Solution logo
Schedule Service

Commercial condensing boiler

Back to Navien products

Navien Commercial condensing boiler NFB700-C Series

Request ServiceEquipment Quote
 Navien NFB700-C Series product image

Technical Specifications

Product Specs

  • Brand: Navien
  • Model or series: NFB700-C Series
  • Equipment type: Commercial condensing boiler
  • Product group: Water heating products
  • condensing boiler equipment
  • combi boiler
  • System role: Hydronic heating equipment for hot-water heating systems
  • 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: navieninc.com

Troubleshooting

Error Codes

View All
E001 Equipment control

Heat exchanger overheat

Record the Navien code, avoid repeated reset attempts, and schedule GreenFlow service.
E003 Combustion / venting

Ignition failure

Record the Navien code, avoid repeated reset attempts, and schedule GreenFlow service.
E004 Combustion / venting

False flame detection

Record the Navien code, avoid repeated reset attempts, and schedule GreenFlow service.
E012 Combustion / venting

Flame loss

Record the Navien code, avoid repeated reset attempts, and schedule GreenFlow service.
E016 Equipment control

Heat exchanger overheat

Record the Navien code, avoid repeated reset attempts, and schedule GreenFlow service.
Loading more

Service planning

How GreenFlow handles NFB700-C Series 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.

Brands We Service

Our Happy Customers

Baran O.

Fast response, punctual, resolved the issue quickly. Thank you

Daniel M.

Responsive company, timely installation professionally done. Hannah is great!

Michael C.

always available, easy to get a hold of, as a property manager I get lots no heat emergency, usually get to it same day or next day

Lesley S.

We were very happy with our experience with Green Flow Solution. After our hot water heater was leaking and needed to be replaced, they were able to install a new one the same day. They were professional and thorough. Thank you!

Henry H.

Replace batteries in thermostat, checked furnace

Judy B.

Andrey was very efficient, professional and on time. The team had fast response to questions. Price to do heatpump maintenance was reasonable.

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...

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.

John F.

I needed 2 new AC units and decided to go with high efficiency heat pumps. I chose Greenflow because of the equipment they offered, and the price (2nd lowest quote and much cheaper than the average of all quote we received). Their technicians were very detail oriented and...

Natalee B.

The technician came and did a wonderful job, we are very happy. He was professional and knowledgeable. Everything was resolved.

Atrian I.

Maintenance and repair A/c unit.

Zachary J.

Our attic unit was leaking - Green Flow dispatched someone right away - and they fixed the problem. It was great. Will use them again if need arises.