Navien NFB-C Series 399K BTU – High Efficiency – Condensing Heating Boiler
The Navien NFB-399C is a wall-hung condensing heating boiler rated at 399,000 BTU/h and 97.5% AFUE, built for light commercial and large residential hydronic systems.
- 399,000 BTU/h input, 97.5% AFUE
- Stainless steel fire tube heat exchanger, 9.6 gal water capacity
- Direct-vent sealed combustion, sidewall or vertical venting (PVC, CPVC, PP)
$853.99
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Description
Navien NFB-C Series 399K BTU – High Efficiency – Condensing Heating Boiler
The Navien NFB-399C is a wall-hung condensing heating boiler rated at 399,000 BTU/h and 97.5% AFUE, built for light commercial and large residential hydronic systems. Its stainless steel fire tube heat exchanger and 9.6-gallon water capacity deliver stable supply temperatures to baseboard, panel radiator and radiant floor loops.
Key Features
- 399,000 BTU/h input, 97.5% AFUE
- Stainless steel fire tube heat exchanger, 9.6 gal water capacity
- Direct-vent sealed combustion, sidewall or vertical venting (PVC, CPVC, PP)
- Natural gas, field convertible to propane
- Cascade ready for multi-boiler plants
- ASME H stamped, CSA 4.9 certified, ENERGY STAR® qualified
- Wall-mount cabinet: 25-1/10" W x 32-4/5" H x 22-3/10" D
- 120V single-phase, electronic ignition
Ideal For
- Light commercial buildings
- Large residential hydronic systems
- Cascaded boiler rooms
Specifications
| Brand | Navien |
|---|---|
| SKU | TGG-BLR-008 |
| Series | NFB-C |
| Input | 399,000 BTU/h |
| AFUE | 97.5% |
| Water capacity | 9.6 gal |
| Certifications | ASME H, CSA 4.9, ENERGY STAR® |
| Condition | New |
Installation
Professional installation by a licensed gas or heating contractor is required; check local codes before purchase.
Shipping & Returns
- Free shipping within the continental United States
- 90-day returns on unused items in original packaging
Appliances Corner Store is an independent retailer and is not affiliated with Navien. Brand names and model numbers are used only to identify the product.
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