Navien NFB-200H Condensing Fire-Tube Heating Boiler, 199,900 BTU/h

Description

The NFB-200H is a heating-only boiler built around Navien’s stainless steel fire-tube heat exchanger, which sits on a non-metallic condensate base, so the acidic condensate a high-efficiency boiler produces collects in a part that cannot corrode. It is rated for both residential and commercial work and is aimed at large homes and buildings with substantial hydronic loads.

Input modulates from 13,300 to 199,900 BTU per hour, a 15:1 turndown, giving a DOE heating capacity of 183,000 BTU per hour and a net AHRI rating of 159,000. It is 95% AFUE, wires directly to three zone valves or three zone pumps, and vents in 2-inch pipe up to 65 feet or 3-inch up to 150 feet. Where one boiler is not enough, up to 16 can be cascaded together, and it is approved for altitudes up to 10,100 feet on natural gas or propane.

This is a gas appliance. It has to be installed by a licensed plumbing or heating professional, following Navien’s installation manual and your local codes for gas supply, venting and condensate drainage. Please confirm sizing and fuel type with your installer before you order.

Specifications

• Model: NFB-200H
• Heating input: 13,300-199,900 BTU/h
• Turndown ratio: 15:1
• Heating capacity: 183,000 BTU/h (DOE); 159,000 BTU/h net AHRI
• AFUE: 95%
• Heat exchanger: Stainless steel fire tube, non-metallic condensate base
• Zone control: Powered connections for 3 zone valves or 3 zone pumps
• Venting: 2 in. up to 65 ft, or 3 in. up to 150 ft
• Cascade: Up to 16 units; common venting up to 8
• Connections: 1-1/4 in. NPT supply/return; 3/4 in. NPT gas
• High altitude: Approved up to 10,100 ft, natural gas or propane
• Dimensions: 17.3 x 17.3 x 27.6 in (W x D x H)
• Weight: 121 lbs
• Installation: Indoor, wall-hung
• Certification: ENERGY STAR