Navien NFB-399C Commercial Fire Tube Condensing Boiler, 399,000 BTU

The Navien NFB-399C is a wall-hung commercial condensing boiler rated at 399,000 BTU/h. A stainless steel fire tube heat exchanger with 9.6 gallons of water volume keeps supply temperatures stable on panel radiators, baseboard and radiant loops, while the wall-hung cabinet frees mechanical-room floor space that a floor-standing boiler of this size would eat.

• 399,000BTU/h input
• 9.6 galwater volume
• ASME Hstamped
• Cascademulti-boiler control

Why it earns its place on the wall

• Commercial capacity on the wall. 399 MBH without a floor-standing footprint.
• Stainless steel fire tube heat exchanger with a large water volume.
• Built-in cascade control to stage several NFB-C boilers for bigger plants.
• Direct vent in PVC, CPVC or polypropylene through a sidewall or roof.
• Natural gas standard, field convertible to propane.

Specifications

Good to know

• Gas appliances must be installed by a licensed professional following the manufacturer’s installation manual and local codes. Manufacturer warranty terms depend on professional installation and registration.
• Specifications are from the manufacturer. Check the current spec sheet and sizing guide before ordering.
• Large units ship by ground freight. You will receive tracking when your order leaves.
• Questions on sizing or venting? Call +1 901-563-1990 or email support@mouchllc.com before you buy.