Peerless® PUREFIRE® Commercial

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The Peerless® PUREFIRE® PF-399, PF-460, PF-850, PF-1000 and PF-1500 gas-fired condensing boilers are available for either natural or LP gas systems; the boilers have a thermal efficiency of up to 96.6%. The direct vent, sealed combustion, commercial-size boilers have ASME and ETL certifications for both the U.S. and Canada. A unique condensate system with built-in neutralizer component and float switch protection is a top feature of this boiler series. Other great features include a high grade stainless steel burner and heat exchanger, 120 volt convenience outlet (PF-399 only), cascade and common vent capability (common venting on PF-850, PF-1000 and PF-1500 only) and LoNOx operation for the good of the environment. The PUREFIRE®’s fully modulating burner assures dependable operation and maximum boiler efficiency. Zero clearance to combustibles, easy access to controls and leveling legs are other standard features that allow for ease of installation and maintenance. The PF-850, PF-1000 and PF-1500 boilers can be stacked to further minimize their small footprint. Boilers are easily converted from LP to natural gas and from natural gas to LP without any additional parts. PUREFIRE® boilers are equipped with a full one-year parts and labor warranty (see “Warranty” section on this site for complete details).

State-of-the-Art Control Board

All Peerless® PUREFIRE® gas boilers are equipped with a state-of-the-art control board that offers modern technology such as an outdoor reset control with an additional outdoor temperature sensor and is cascade capable for operation of up to 16 units as a single module. The control board also has built-in technology for domestic hot water priority and an energy saving heat recovery function that improves hot water performance and reduces off cycle losses. Standby temperature of domestic hot water is controlled by economic low fire operation. Additionally, the control board’s LCD status display module uses plain English for easy-to-read status and troubleshooting text while a switch to "system test mode" enables contractors to manually control the firing rate.

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Type: Commercial
Construction: Stainless Steel
Fuel: Gas-Fired (Natural or LP)
Input: 80 to 1,500 MBH
Output: 373 to 1,448 MBH
Venting: Sealed Combustion, Direct Vent
Trim: Water
Combustion: Direct Spark


  • 96.6% Thermal Efficiency
  • Condensing Boiler with Fully Modulating Burner
  • Built-in Condensate Neutralizer System with Float Switch
  • ASME and ETL Certified for U.S. and Canada
  • Outdoor Reset Capability
  • State-of-the-Art Control Board
  • Cascade Capable—up to 16 Boilers

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  • AHRI Member

Peerless® PUREFIRE® Commercial Series
Model Number Input, MBH Heating Capacity NET Ratings Water1, MBH Thermal Efficiency, %
Min Max
PF-399 80 399 380 330 95.2
PF-460 92 460 438 381 95.2
PF-850 85 850 818 711 96.2
PF-1000 100 1,000 966 840 96.6
PF-1500 150 1,500 1,448 1,259 96.5

1 Net water ratings based on an allowance of 1.15.

2 Consult factory before selecting a boiler for installations having unusual piping and pickup requirements, such as intermittent system operation, extensive piping systems, etc.

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PF-850, 1000 & 1500

Peerless® PUREFIRE® Commercial Boiler Dimensions

Boiler Model Number Dimensions
PF-399 27-15/16" 17-3/16" 40-1/2" 1-1/2" 4" 3/4" 2-3/4" 5-1/4" 3-1/2" 5-3/4" 7-1/6"
PF-850 36-1/4" 26-1/2" 46" 2" 6" 1-1/4" 3-3/4" 4-1/8"
PF-1000 39-1/8" 26-1/2" 46" 2" 6" 1-1/4" 3-3/4" 4-1/8"
PF-1500 60-3/4" 26-1/2" 46" 2-1/2" 7" 1-1/2" 8-1/2" 5-1/2"

Carton Dimensions & Shipping Weights

Boiler Model Number Length Width Height Approximate Shipping Weight (lbs.)
PF-399 25" 32" 50" 255
PF-850 54-1/2" 32" 52" 345
PF-1000 54-1/2" 32" 52" 405
PF-1500 79-1/2" 32" 52" 690

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