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Peerless PF-399-N PureFire - 399,000 BTU - Hot Water Boiler - NG - 93.4% EFF - Direct Vented - 0 to 10,000 Ft. Altitude

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Factory Trained
Product Specifications
General Information
Product Line
Hot Water
Fuel Type
Natural Gas
Combustion Type
Vent Type
Direct Vent
DHW Production
Mount Type
Minimum Altitude (Feet)
0 Feet
Maximum Altitude (Feet)
10000 Feet
Includes Pump
Assembly Type
Gas Conversion Kit
Maximum Input Capacity (BTU)
399000 BTU
Minimum Input Capacity (BTU)
80000 BTU
Input Capacity Range
DOE Heating Capacity (BTU)
373000 BTU
Net I=B=R Capacity (BTU)
324000 BTU
Efficiency (%)
93.4 %
Efficiency Type
Electrical Data
Voltage (Volts)
120 Volts
Frequency (Hertz)
60 Hertz
Flue Connection Size (Inches)
4 Inches
Supply Connection (Inches)
1.5 Inches
Return Connection (Inches)
1.5 Inches
Product Height (Inches)
40.500000 Inches
Product Width (Inches)
17.187500 Inches
Product Depth (Inches)
27.937500 Inches
Shipping Height (Inches)
50.000000 Inches
Shipping Width (Inches)
32.000000 Inches
Shipping Depth (Inches)
25.000000 Inches
Shipping Weight (Pounds)
255 Pounds
Warranty Information
Parts Warranty (Years)
1 Year
Heat Exchanger Warranty (Years)
10 Years
ETL Listed
CSA Listed
ASME Certified
AHRI Certified
Country of Origin
United States
AHRI Reference Number
Buying Guides
Model: PF-399-N
Factory Direct: 
Allow 3 - 4 Weeks
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For over a century Peerless has dedicated itself to making efficient, durable boilers. The PureFire line is emblematic of these qualities. This is a direct vent, condensing boiler with DHW priority and an internal condensate system. A stainless steel burner and heat exchanger discourage corrosion and wear. The combination of first-rate components and advanced technology make the PF-399-N an excellent choice for heating your home or business. The PF-399-N is compact and requires zero clearance to combustibles, making installation flexible and easy. Front-mounted controls with clear error displays confer that same simplicity to maintenance. Between the efficiency-enhancing features and the quality construction, Peerless PureFire Hot Water Boilers are an attractive and reliable heating solution.

Product Features

Modulating Burner
The PF-399-N uses a modulating burner to scale heating to your needs. This burner will vary its output based on your desired temperature, preventing the overuse of energy. Anti-cycling times set during installation prevent short-cycling.

LoNOx Operation
Not only is the PF-399-N environmentally friendly by virtue of its tremendous efficiency, but its LoNOx operation means significantly reduced emissions and a minimal environmental footprint.

Equipped for Outdoor Reset
PureFire hot water boilers include an outdoor temperature sensor and outdoor reset capability. With outdoor reset control to balance your heat production, the PF-399-N improves efficiency and comfort automatically.

Condensate System
All Peerless PureFire boilers have an internal condensate system. This system protects your heat exchanger from condensate backup with a float switch. It also neutralizes the acidity of any condensate produced. The result is a clean, efficient, and safe boiler.

The PF-399-N hot water boiler may be converted—from natural gas to propane and vice versa—in the field by a trained and qualified professional. Also, the PureFire line supports cascading; up to 16 PureFire boilers may be connected together. These options mean that even if your heating requirements change over time, the PureFire is still a solution.

Product Includes
  • (1) Peerless PF-399-N PureFire Hot Water Boiler
  • (1) Peerless 54112 Outdoor Temperature Sensor
  • (1) PVC/CPVC Boiler Vent Adaptor
  • (1) Field Conversion Kit
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  • Ships via Semi-Truck
  • Curb Side Delivery
  • Free to Lower 48 States
  • Standard Rates to Alaska, Hawaii
Lift Gate Services
  • Safely Lowers Products Off the Truck
  • Requires Special Hydraulic Lift
  • Free Lift Gate
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