Prodotti Aerotermi B




Reznor's B gas-fired, gravity-vented unit heaters are designed for ceiling suspension with a centrifugal blower for air delivery with 80% thermal efficiency. They can be used with natural or propane gas, and are specified in sizes from 25,000 to 400,000 BTUH input.

These units are approved for installation in The United States and Canada by the Canadian Standards Association(CSA).  Canadian units require the selection of a totally enclosed motor.


  • Not certified for residential use.
  • WARNING: Gas-fired appliances are not designed for use in hazardous atmospheres containing flammable vapors or combustible dust, or atmospheres containing chlorinated or halogenated hydrocarbons. Installations in public garages or airplane hangars are permitted when in accordance with ANSI Z223.1 and NFPA54 Codes or CAN1-B149 Codes and enforcing authorities.  NOTE: Regulated combination redundant gas valve consists of combination pilot solenoid valve, electric gas valve, pilot filter, pressure regulator, pilot shutoff, and manual shutoff, all in one body.  Gas supply pressure must not exceed 0.5 psi (8 oz or 14"w.c.).  Minimum inlet pressure for natural gas is 5" w.c.; minimum inlet pressure for propane gas is 11" w.c.CAN/CGA 2.6

Capacità di riscaldamento ( MBH )

Campo di portata d'aria ( CFM )

Freccia d'aria ( Feet )

Rendimento termico (carico massimo) ( Gross )


  • Orifices for natural gas
  • Aluminized steel heat exchanger
  • Aluminized steel burner rack with stainless steel insert
  • Single-stage combination gas valve
  • Spark ignited pilot
  • 115/1/60 supply voltage - Sizes 25-300230/1/60 supply voltage - Size 400
  • A.G.A. models - ODP motor with internal overload.  C.G.A. models - totally enclosed blower motor
  • Motor contactor - Sizes 300 and 400
  • Direct drive blower with multi-speed taps - Sizes 25-100.  Adjustable belt drive blower - Sizes 125 - 400
  • Fan and limit safety controls
  • Blocked vent shutoff system
  • Energy cutoff (ECO) device
  • 24-volt control voltage transformer
  • Horizontal/vertical vent outlet
  • Horizontal louvers or duct adapter
  • Terminal strip connector for 24-volt field wiring
  • Convenient bottom burner access
  • 4-point 3/8"-16 threaded hanger connections

Options /Accessories - Factory Installed:

  • Equipped for propane gas
  • Equipped for high altitude (2001-9000 ft)
  • E-3 (409) stainless steel heat exchanger and burner
  • Two-stage gas control (50% low fire) - Sizes 75-400
  • Spark ignited, intermittent safety pilot with electronic flame supervision and with or without timed lockout (timed lockout is required for propane gas)
  • Manual summer/winter switch
  • Burner air shutters
  • 208/230 single phase supply voltage
  • 208/230 three phase supply voltage
  • 460 three phase supply voltage - Sizes 75-400
  • 575 three phase supply voltage - Sizes 125-400
  • Belt guard and/or blower inlet guard
  • Alternate motor HP and drive - Sizes 50-400 (See page 24)
  • Burner air shutters
  • Totally enclosed blower motor
  • Low ambient fan control relay

Options /Accessories - Field Installed:

  • Power venter
  • Vertical louvers
  • Downturn air nozzle, 25-65 Deg. or 50-90 Deg. variable air deflector range
  • Thermostat and relay kits
  • Air recirculation kits
  • Manual summer/winter switch
  • Filter cabinet with 1" or 2" filters
  • Polytube adapter - models 75-400
  • Multiple heater control
  • Hanger kits to suspend from 1" pipe or to use with vibration isolation suspension
  • Unit-mounted thermostat bracket
  • Step down transformer 230/115 or 460/115 - Sizes 25-100
  • Burner air shutters
  • Low ambient fan control relay kit
  • Belt guard and/or blower inlet guard
  • Single-stage and two-stage thermostats
  • Thermostat guard with locking cover
  • Manual shutoff valve and union
  • Gas conversion kit



1 File


Product overview brochure Reznor , English
Product overview brochure of Reznor in English
for Europe and export markets with 50 Hz utility frequency, but excluding UK and North-America, which have their own product range and product overview brochures.
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1.7 MB

Servizio / Installazione
7 Files

Servizio / Installazione

Unit Installation Manual - F & B
Installation manual for Models F & B
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1.5 MB
Parts Manuals - Replacement Ignition System and Gas Valves
Replacement ignition system and gas valves by serial number code and Maxitrol system components by serial number suffix
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1.3 MB
Conversion Info - Gas Conversion - Model F, B
Gas conversion kit and instructions for Models F & B
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308.1 kB
Conversion Info - Ignition Conversion Kit - Models F, B
Ignition conversion kits to convert older Model F & B heaters with standing pilot to spark-ignited, intermitten safety pilot with or without lockout
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418.8 kB
Field Service - Gasket Kit for Heat Exchanger - B
Gasket kit for replacement heat exchanger for Model B
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66.5 kB
Field Service - Replacement Relay Kit - PN 259521
Replacement relay kit for Reznor part number 259521 - applies to power vented units using Reznor part number 46233 or 259518 time delay relay
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646.2 kB
Field Service - Ignition Control Replacement - Various Models
Ignition control replacement kit for pilot code 62, 63, 65, 66, & 84 (found in first set of digitis of serial number)
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250.4 kB