HVACopediaNavien · Boiler
Exhaust Temp Status Information item 20 - Exhaust Temp
What the display is showing
Exhaust temperature (F). Read-only item 20 in the Status Information menu.
Applies to: NHB-055H, NHB-080H, NHB-110H, NHB-150H
What to do
- Menu > 1. Status Information > scroll to the item.
Settings for these units
Installation clearances (indoor) · Navien NHB-H
| Side | Minimum clearance |
|---|---|
| Top | 9 in (229 mm) |
| Back | 0.5 in (13 mm) |
| Front | 4 in (100 mm) |
| Sides | 3 in (76 mm) |
| Bottom | 12 in (300 mm) |
| Vent to combustibles | 0 in |
Bracket gives 5/8 in (16 mm) from the wall; studs at 16 in on centre.
Common vent installs: 36 in above the top and 24 in in front are recommended for service.
Models that show this code
4 models in Navien NHB-H
Other codes on the same units
- Dual Venturi Status Input/Output Status item 13 - Dual Venturi Status
- EMS Data EMS Data menu (history counters)
- Elapsed Time After Install EMS Data counter 1
- Error History Error history list
- Fan Current APS Status Information item 19 - Fan Current APS
- Fan Current RPM Status Information item 17 - Fan Current RPM
- Fan Target APS Status Information item 18 - Fan Target APS
- Fan Target RPM Status Information item 16 - Fan Target RPM
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Source: Navien NHB-H User's Information Manual (V1.0 Apr 2024), 3.3, p.13-14; Navien NHB-H Installation and Operation Manual, 11.7, p.103-104. Summarized in our own words; check the original manual for your model.
For licensed technicians. Gas, electrical and refrigerant work must be done by a qualified, licensed person. Shut off power and gas before servicing, never bypass a safety control, and follow the manufacturer’s manual for the exact model; it and local codes always take priority. HVACopedia is not affiliated with any manufacturer; brand and model names only identify the equipment.