NCB700-240/110 premium features and benefits
New external air intake filter.
Check and clean intake vent filter screen of debris, without opening the cabinet.
New enhanced fan and motor.The fan/motor has added anti-vibration to run quieter and is more powerful for longer vent lengths.
New dual venturi motor.
The stronger stepper motor gives added performance and durability.
User-friendly interface control panel with intuitive Setup Wizard software
Vent installation detector (VID).
Added safety during installation and service.
New dual heat exchanger design with added durability and performance.Our dual stainless steel heat exchangers feature an enhanced tube design for improved heat transfer.
Advanced connectivity
Wi-Fi modules are integrated into the control, allowing direct connection to a smartphone or tablet with the NaviLink App.
Lower profile DHW module.
The redesign of the DHW module has reduced the height, giving the contractor easier access and serviceability.
NCB700-240/110 QuickFacts
17.3" W x 27.3" H x 12.8" D (43.9cm W x 69.3cm H x 32.5cm D)
Product approvals
- AHRI number
- 218432602
Space Heating Ratings
- AFUE, %
- 96.0
- Heating Capacity
- 102,000 BTU/h (29.89 kWh)
| DHW Temp Rise | NCB700-240/110 |
|---|---|
| 35 °F (19.4 °C) rate | 10.4 GPM (39.4 l/m) |
| 45 °F (25 °C) rate | 7.9 GPM (29.9 l/m) |
| 67 °F (37.2 °C) rate | 5.4 GPM (20.4 l/m) |
| 77 °F (42.8 °C) rate | 4.7 GPM (17.8 l/m) |
| Model | NCB700-240/110 |
|---|---|
| Heating | 13,000 - 110,000 BTU/h (3.81 - 32.23 kWh) |
| DHW | 13,300 - 199,900 BTU/h (3.9 - 58.57 kWh) |
| Item | Temperature Setting Range | |
|---|---|---|
| Space Heating | Supply | 77 - 185 °F (25 - 85 °C) |
| Return | 68 - 158 °F (20 - 70 °C) | |
| DHW | 86 - 140 °F (30 - 60 °C) | |
Navien Combination Boiler Space Heating Ratings | ||
|---|---|---|
| Model1 | NCB700-240/110 | |
| Heating Input | Min | 13,000 BTU/h (3.81 kWh) |
| Max | 110,000 BTU/h (32.23 kWh) | |
| Heating Capacity2 | 102,000 BTU/h | |
| Net AHRI Rating, Water3 | 89,000 BTU/h | |
| AFUE2, % | 96 | |
Other Specifications | ||
| Water pressure | Min | 12 PSI (0.8 kg/cm2) |
| Max | 30 PSI (2.1 kg/cm2) | |
| Water Connection Size (Supply, Return) | 1 in NPT | |
Navien Condensing Boiler Domestic Hot Water Ratings | ||
|---|---|---|
| Model1 | NCB700-240/110 | |
| Input Ratings | Min | 13,300 BTU/h (3.9 kWh) |
| Max | 199,900 BTU/h (58.57 kWh) | |
Other Domestic Hot Water Specifications | ||
| Water pressure | Min | 15 PSI (1.1 kg/cm2) |
| Max | 150 PSI (10.5 kg/cm2) | |
| Minimum Flow Rate | 0.5 GPM (1.9 l/m) | |
| Flow Rate 45 °F (25 °C) Temp Rise | 7.9 GPM (29.9 l/m) | |
| DHW Connection Size (Supply, Return) | 3/4 in NPT | |
1 Ratings are the same for natural gas models converted to propane use.
2 Based on U.S. Department of Energy (DOE) test procedures.
3 The net AHRI water ratings shown are based on a piping and pickup allowance of 1.15.
| Item | NCB700-240/110 | |
|---|---|---|
| Dimensions | 17.3" W x 27.3" H x 12.8" D (43.9cm W x 69.3cm H x 32.5cm D) | |
| Boiler weight | 88 lbs (39.9 kg) | |
| Boiler Weight With Water | 93 lbs (42.2 kg) | |
| Installation location | Indoor wall-hung | |
| Ignition | Electronic ignition | |
| Natural gas supply pressure (from source) | 3.5 " WC to 10.5 " WC (0.87 kPa to 2.61 kPa) | |
| Propane gas supply pressure (from source) | 8 " WC to 13.5 " WC (1.99 kPa to 3.36 kPa) | |
| Natural gas manifold pressure (min-max) | -0.02 " WC to -0.16 " WC (-0.005 kPa to -0.04 kPa) | |
| Propane gas manifold pressure (min-max) | -0.02 " WC to -0.2 " WC (-0.005 kPa to -0.05 kPa) | |
| Connection sizes | Gas inlet | 3/4 in NPT |
| Power supply | Main supply | 120V AC, 60Hz |
| Maximum power consumption | Up to 15 amperes | |
| Materials | Casing | Cold-rolled carbon steel |
| Heat exchanger | Stainless steel | |
| Venting type | Forced draft direct vent | |
| Venting | Exhaust | 2" or 3" PVC, CPVC, approved polypropylene 2" or 3" special gas vent type BH (Class III, A/B/C) 2" or 3" stainless steel |
| Intake | 2" or 3" PVC, CPVC, polypropylene 2" or 3" special gas vent type BH (Class III, A/B/C) 2" or 3" stainless steel | |
| Vent clearances | 0" to combustibles | |
| Safety Devices | Flame rod, APS, ignition operation detector, water temperature high limit switch, exhaust temperature high limit sensor, water pressure sensor, vent installation detector | |
| Temperature setting range | 86 - 140 °F (30 - 60 °C) | |
Navien reserves the right to change specifications at any time without prior notice.
NCB700 Coverage Table
| Product | Labor | Parts | Heat Exchanger |
|---|---|---|---|
NCB700 (Residential2) | 1 Year | 5 Years | 10 Years |
NCB700 (Residential2)
NCB700 (Residential2)
Heat Exchanger1 – Refers only to the Primary/Secondary Heat Exchanger. The domestic Heat Exchanger is covered under the Parts Warranty.
Residential2 - Applies only to a single-family dwelling that services one (1) living unit. Any property converted or utilized to service two or more separate dwelling units, regardless of the municipal address, is automatically classified as a Commercial application.
Compare NCB700 models
NCB700-190/060
NCB700-190/080
NCB700-240/110
NCB700-240/130
NCB700-250/150
NCB700-240/110 FAQs
How do I know which NCB700 model is right for my home?
The right model depends on both your home’s space-heating load and your household’s hot water demand. A qualified Navien installer will size the system for your home rather than selecting a boiler based on square footage alone.
Can this NCB700 model be converted to propane?
Yes. NCB700 boilers come configured for natural gas, and the required propane conversion kit is included. Conversion must be completed by a qualified professional using the Navien-supplied kit.
Can the NCB700 be installed outdoors?
No. NCB700 combi-boilers are designed for indoor, wall-hung installation only.
How much clearance does the NCB700 need?
For indoor installation, the minimum clearances are 9 inches above the boiler, 12 inches below, 3 inches at each side, 4 inches in front and 0.5 inch behind the unit. Additional space may be needed for piping, venting and service access.
What’s the minimum hot water flow needed for the NCB700 to activate?
The NCB700 begins domestic hot water operation when its flow sensor detects approximately 0.5 GPM or more of hot water demand. That’s roughly the flow you might get from a bathroom faucet turned partway on. You don’t need to open a tap fully for the boiler to recognize hot water demand.
How hot can domestic hot water temperature get with the NCB700?
The NCB700 allows domestic hot water temperature settings from 86°F to 140°F. The appropriate setting depends on household needs and should be configured with scald protection in mind.
What size venting does the NCB700 use?
The NCB700 supports 2-inch or 3-inch venting for direct-vent installations. The maximum allowable vent length depends on pipe size, material and the number of fittings in the vent system.