NHW-199AI premium features and benefits
![Nhw-ai open insidestory3](https://navien-production-3.s3-us-west-2.amazonaws.com/2023/07/06/16/36/24/040c13db-e578-4304-8889-e2b459986cb8/NHW-AI_Open_InsideStory3.png)
![Pump2](https://navien-production-3.s3-us-west-2.amazonaws.com/pictures/2235/59859ad46bb95694b0483dd89e0abc05cd0127b5/Pump2.png)
ComfortFlow® built-in recirculation system
The patented ComfortFlow® system is the first to include a buffer tank, recirculation pump and fine-tuned controls into a tankless water heater.
![Control-panel-ai](https://navien-production-3.s3-us-west-2.amazonaws.com/pictures/2253/be11f55ffa683f60e996c5d88f64e43a1872ea5a/Control_panel_AI.png)
NHW-A Built-in control panel
Allows you to adjust water temperature, operation status and troubleshooting.
![Aps](https://navien-production-3.s3-us-west-2.amazonaws.com/pictures/2233/ace815dc61819d7864b2f7334a01b7b34f732025/APS.png)
Built-in Air Pressure Sensor (APS)
Monitors vent system for blockage, automatically compensates for range of vent lengths, helps maintain proper air/gas ratio during operation, and ensures consistent hot water output during changing conditions.
![Features circle](https://navien-production-3.s3-us-west-2.amazonaws.com/pictures/2248/ef8cf90e708c7d52c77fe379c342235b9b6458af/Features_Circle.png)
Includes advanced safety features Such as the Vent Installation Detector (VID)
![Nhw-ai open insidestory@3x](https://navien-production-3.s3-us-west-2.amazonaws.com/2023/07/11/20/58/04/39310794-9744-42dc-9f13-513d941874f0/NHW-AI_Open_InsideStory@3x.png)
![Wav(h)](https://navien-production-3.s3-us-west-2.amazonaws.com/pictures/2247/53b368bfd4de2f1e3832dba71858cc4107e953d1/WAV_H_.png)
Built-in Water Adjustment Valve (WAV) & Mixing Valve
Control flow to maintain setpoint and stabilize water temperature during flow changes.
![Exchanger (e)](https://navien-production-3.s3-us-west-2.amazonaws.com/pictures/2243/c6ef3dd685f05063b96fad1c1244aa16ebf8f2f5/Exchanger_E_.png)
Exclusive NaviTech™ stainless steel heat exchanger
The NWH700 series non-condensing tankless water heaters feature a stainless steel heat exchanger to deliver unmatched durability and performance.
![Burner (f)](https://navien-production-3.s3-us-west-2.amazonaws.com/pictures/2245/11e183bd802b404ca56966b48bddad18a71ef870/Burner_F_.png)
Patented NaviTech™ stainless steel gas burner
Designed and manufactured by Navien to burn gas at higher efficiency than other system on the market.
![Board(g)](https://navien-production-3.s3-us-west-2.amazonaws.com/pictures/2244/ce06e2c11ae9eede6647b977490d90c0e602f492/Board_G_.png)
Recirculation control built into circuit board
Ensures proper system setup, and reduces the need for additional components, saving installation time and cost.
NHW-199AI QuickFacts
17.3" W x 26.5" H x 10.3" D (43.9cm W x 67.3cm H x 26.2cm D)
Product approvals
- CSA
- Yes
- NSF(Standard 5)
- Yes
- Low Lead(<0.25%)
- Yes
- Ultra low NOx
- Yes
- AHRI Number
- 212617043 (Natural gas)
212617049 (Propane)
Efficiency Ratings*
- Uniform Energy Factor(UEF)
- 0.81
- MAX GPM(67°F Rise)
- 5 GPM (18.9 l/m)
*Based on U.S. Department of Energy (DOE) test procedures.**Based on a national average natural gas cost of $1.09/therm, propane cost of $2.41/gallon.
Temp Rise | NHW-199AI |
---|---|
30 °F (16.7 °C) rate | 11.1 GPM (42 l/m) |
35 °F (19.4 °C) rate | 9.5 GPM (36 l/m) |
40 °F (22.2 °C) rate | 8.3 GPM (31.4 l/m) |
45 °F (25 °C) rate | 7.4 GPM (28 l/m) |
50 °F (27.8 °C) rate | 6.6 GPM (25 l/m) |
55 °F (30.6 °C) rate | 6 GPM (22.7 l/m) |
60 °F (33.3 °C) rate | 5.5 GPM (20.8 l/m) |
65 °F (36.1 °C) rate | 5.1 GPM (19.3 l/m) |
70 °F (38.9 °C) rate | 4.7 GPM (17.8 l/m) |
75 °F (41.7 °C) rate | 4.4 GPM (16.7 l/m) |
80 °F (44.4 °C) rate | 4.1 GPM (15.5 l/m) |
85 °F (47.2 °C) rate | 3.9 GPM (14.8 l/m) |
90 °F (50 °C) rate | 3.7 GPM (14 l/m) |
100 °F (55.6 °C) rate | 3.3 GPM (12.5 l/m) |
Model | NHW-199AI |
---|---|
DHW | 10,700 - 199,900 BTU/h (3.135 - 58.571 kWh) |
Item | NHW-199AI | |
---|---|---|
Heat Capacity (input) | Domestic hot water | 10,700 - 199,900 BTU/h (3.135 - 58.571 kWh) |
Efficiency ratings | Efficiency rating for NG & LP (UEF) | 0.81 |
Flow rate (DHW) | 35°F temp rise | 9.5 GPM (36 l/m) |
45°F temp rise | 7.4 GPM (28 l/m) | |
67°F temp rise | 5 GPM (18.9 l/m) | |
Dimensions | 17.3" W x 26.5" H x 10.3" D (43.9cm W x 67.3cm H x 26.2cm D) | |
Weight | 65 lbs (29.5 kg) | |
Installation location | Indoor wall-hung | |
Venting type | Forced draft direct vent (indoor only) | |
Ignition | Electronic ignition | |
DHW water pressure | 15-150 PSI (1.055-10.545 kg/cm2) | |
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 " WC (1.99 kPa to 3.23 kPa) | |
Natural gas manifold pressure (min-max) | 2.8 " WC to 0.7 " WC (0.7 kPa to 0.17 kPa) | |
Propane gas manifold pressure (min-max) | 5.4 " WC to 1.3 " WC (1.3 kPa to 0.32 kPa) | |
Minimum flow rate | 0.4 GPM (1.514 l/m), < 0.01 GPM (0.04 l/m) with ComfortFlow* | |
Connection sizes | Cold water inlet | 3/4" NPT |
Hot water outlet size | 3/4" NPT | |
Gas inlet | 3/4" NPT | |
Power supply | Main supply | 120V AC, 60 Hz |
Normal | 115 W | |
Standby | 4 W | |
Anti-frost | 114 W | |
External pump | < 150 W, 1.5 A W | |
Fuse | 5.0 A | |
Materials | Casing | Cold rolled carbon steel |
Heat exchangers | Stainless steel | |
Safety Devices | Flame rod, APS, VID (vent installation detector), ignition operation detector, water temperature high limit switch, power surge fuse |
* Available for NHW-A Models configured in an optional ComfortFlow® recirculation mode.
Energy consumption will increase when the system is configured for recirculation.
Navien reserves the right to change specifications at any time without prior notice.