Navien 55,000 NHB NAVI NHB-55 55,000 BTU/H Heating Boiler

Product Description

The NAVIEN 55,000 NHB NAVI NHB-55 is a high-efficiency condensing heating boiler with an AFUE of 95%. This indoor, wall-hung unit features an advanced burner system and a turn-down ratio of up to 7:1. The integrated control offers adjustable heat capacity, anti-cycle timer, and outdoor reset. It also has freeze protection and adjustable minimum burner time setting.

• Super condensing efficiency
• Dual stainless steel heat exchangers
• SCH40, 2" PVC venting up to 60'

Product Highlights

High-efficiency condensing boiler with dual stainless steel heat exchangers and integrated controls for optimal performance.

Product Information

Standard Information

• Brand: NAVIEN
• Manufacturer Part Number: 55,000 NHB NAVI

Technical Specifications

• Dimensions: 17.0" W x 24.0" H x 12.0" D
• Weight: 73.0lbs
• Installation Type: Indoor wall-hung
• Venting Type: Forced draft direct vent
• Ignition: Electronic ignition
• Natural gas supply pressure (from source): 3.5" WC to 10.5" WC
• Propane gas supply pressure (from source): 8" WC to 13" WC
• Natural gas manifold pressure (min-max): -0.03" WC
• Propane gas manifold pressure (min-max): -0.03" WC
• Connection Sizes: Gas inlet = 3/4" NPT (female)
• Power Supply: Main supply = 120V AC, 60Hz
• Maximum power consumption: Less than 10A
• Casing: Cold rolled carbon steel
• Heat exchangers: Primary and secondary heat exchangers: stainless steel
• Exhaust: 2" or 3" PVC, CPVC, approved polypropylene (see installation manual for more details) 2" or 3" special gas vent type BH (Class III, A/B/C)
• Intake: 2" or 3" PVC, CPVC, polypropylene 2" or 3" special gas vent type BH (Class III, A/B/C)
• Vent clearances: 0" to combustibles
• Safety Devices: Flame rod, APS, gas valve operation detector, ignition operation detector, water temperature high limit switch, exhaust temperature high limit sensor
• Model: NHB-55
• Heating Input, MBH: Min 8 - Max 55
• Heating Capacity, MBH: 51
• Net AHRI Rating, Water, MBH: 44
• AFUE, %: 95.0
• Range (BTU/H): 8,000 - 55,000
• TDR: 7:1