Reznor model RHH is the new Pre-Engineerd Air-Handler with 91% efficiency. Model RHH is available in 4 sizes, 130MBH, 180MBH, 260MBH and 350MBH and can be used with either natural gas or propane. Model RHH units are approved for makeup air and space heating applications in commercial/industrial installations in the United States and Canada by ETL Testing Agency.



Heating Range ( MBH )

Cooling Range ( MBH )

Airflow Range ( CFM )

Heating Efficiency at full load ( Gross )


  • Patented* Tcore3 Combustion System - includes Titanium Stabilized Aluminized Steel Heat Exchanger and aluminum secondary heat exchanger
  • ETL certification
  • Minimum 91% thermal efficiency
  • Maximum 75 F temperature rise
  • Circuit breaker protected transformer for 24-volt controls
  • Integrated circuit board with diagnostic indicator lights
  • Multi-try direct spark ignition with 100% lockout
  • High temperature limit control
  • Vibration/noise isolated venter motor, blower(s) and blower motor (spring or rubber isolators)
  • L50 bearing rating with a life expectancy of 150,000 hours
  • Reverse airflow limit switch
  • Easily convertible single gas orifice system
  • Socketed, high quality switching relays to facilitate service
  • All service and vent connections from a single side
  • Through-the-cabinet or through-the-base electrical
  • Engineered condensate management
  • Three hinged service doors with heavy duty hardware
  • Fully gasketed door panel with safety door switch
  • Pre-coat white gloss painted cabinet finish
  • 4-point base suspension; or slab or floor mounting
  • Fork lift openings built into the heavy gauge steel base
  • Natural Gas or Propane
  • Blocked condensate drain pressure switch
  • Vent pipe temperature limit switch


  • Optional 409 Stainless Steel Primary Heat Exchanger
  • Heat Exchanger Extended Warranty - 5-year or 10-year
  • Controls: Space Temperature Heating only, Heating and Cooling
    • Analog two-stage gas valve with room thermostat control (thermostat is available as a shipped separate
      accessory or may be field-supplied)
    • Digital two-stage heating/three-stage cooling with room command module and optional Lon or N2 communication.
  •  Supply Voltage - 115/1; 208/1; 230/1; 208/3; 230/3; 460/3; 575/3
  • UV Germicidal Lamps - Ultraviolet Emitter for neutralization of VOCs and airborne micro-organisms for improved IAQ - not filtration. (Requires Cooling Coil Cabinet Option AU. Separate 115/1 or 208/1 or 230/1 wiring/breaker and a separate disconnect must be provided.)
  • Inlet Air Filters - 1" or 2" disposable or permanent; 1", 2", or 4" pleated disposable; arranged in vertical flat bank for ease of service
  • Cabinet Configuration and Construction
    • Left or right side controls
    • Insulation; double wall with standard (R value 3.8) or high-density (R value 4.4) insulation
    • Blower cabinet screen, inlet duct connection flange
  • Discharge duct flange or louvers (horizontal or horizontal and vertical)
  • Mixing Box Module
    • Five inlet configuration combinations including top, bottom, and rear motorized modulating return air and outside air dampers
    • Direct-coupled 24VAC damper actuators
    • Economizer package Enthalpy
  • Blower Motor (1/3 to 5 HP) - see pressure drops and blower charts
    • Open drip proof, TEFC, or premium efficiency
    • Adjustable sheave and belt
    • Motor contactor; IEC motor starter; or factory-installed variable frequency drive
  • Cooling Coil Module with coil
    • DX coil (single, dual or 1/3-2/3 circuit; galvanized or stainless casing; copper or aluminum fi ns [coated or uncoated]) - non-ozone depleting, R410A refrigerant
    • Chilled water coil (1/4, 1/2, 3/4, or full circuiting; galvanized or stainless casing; copper or aluminum fins [coated or uncoated])
  • Unit mounted, lockable, non-fused service on/off switch
  • Convenience Outlet (requires separate power supply)
  • Firestat
  • Discharge Temperature Low Limit
  • Over/Under Voltage or Phase Loss Protection
  • High Ambient Limit (burner cutoff)
  • Gas Pressure Switches (high, low, or both)


  • Variable Frequency Drive (factory-installed is also available)
  • Thermostats to match analog controls
  • Gas Pressure Regulator
  • Smoke Detector (in ductwork)
  • Remote Control Console and Unit Monitoring
  • Main Unit Disconnect Switch
  • M-Series condenser

8 Files


Split System Marketing Catalog
Split Systems Marketing Catalog
Download File
886.0 kB
Comp Edge: The wide range of options and features of PreevA and the M-Series Condensing unit
Competitive Edge: The wide range of options and features of PreevA and the M-Series Condensing unit
Download File
599.9 kB
Comp Edge: Model RHH, SHH - the FIRST commercial air handler split system with up to 93% efficient gas heat
Competitive Edge: Model RHH, SHH - the FIRST commercial air handler split system with up to 93% efficient gas heat
Download File
286.1 kB
Comp Edge: Superior Dehumidification with ReHeat Pump™
Advantages of using a ReHeat Pump vs. a hot gas reheat (HGRH) system
Download File
404.7 kB
Energy Edge: Condensing Gas Heating (90%+ Efficient)
No matter what region you are in North America, Heating makes up the majority of the average building energy usage. By using Reznor condensing gas heating equipment (over 90% fuel efficient), you can make a big impact on the overall utility bills.
Download File
404.4 kB
Energy Edge: Estimation of fuel savings by using Model RHH or SHH in various areas of North America
Energy Edge: Estimation of fuel savings by using Model RHH or SHH in various areas of North America
Download File
683.7 kB
Energy Edge: By matching building heating and cooling needs, the PreevA Series can save energy
Energy Edge: By matching a building heating and/or cooling needs (at full or part load), the PreevA Series can save energy and provide more consistent comfort levels
Download File
486.7 kB
Heating, Cooling, Ventilation & VRF Product Line
Heating, Cooling, Ventilation & VRF Product Line Sheet
Download File
607.6 kB

Technical Data
2 Files

Technical Data

Catalog - Split System
Commercial split systems catalog
Download File
3.3 MB
Sample Specs - RHH
Sample specifications for Model RHH (Word document)
Download File
17.0 kB

13 Files


Unit Installation Manual - Outdoor PreevA
Installation manual for Models RDH, REH RHH, & RXH
Download File
2.7 MB
Parts Manuals - PREEVA
Replacement parts for PREEVA Models PDH, PEH, PXH, RDH, REH, RHH, RXH, SDH, and SHH
Download File
10.5 MB
Option RB5 - Installation - Remote Display
Installation instructions for optional remote mounted display for PreevA & MAPS Series, and Model ZQYRA
Download File
335.8 kB
Conversion Info - Gas Conversion - PreevA
Gas conversion kit instructions for Models PDH, SDH, SHH, RHH, & RDH with 1-stage gas control or 2-stage gas control
Download File
334.1 kB
Option - Installation - Roof Curbs Assembly
Instructions for installing roof curb for various models
Download File
1.6 MB
Controls - D19, D21, and D22 Control Manual
Air handler system control options D19, D21, and D22
Download File
1.2 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
Download File
1.3 MB
Operation - PreevA
Operation, maintenance and service manual for PreevA systems, Models SHH, RXH, RDH, REH, PXH, SDH, PDH, & PEH
Download File
861.1 kB
Field Service - Adjustment of Control FX06 - PreevA
Application and instructions for field adjustment of the contorl (Model FX06) in digital control options D12B, D12C, D12D, D12E, D12F, & D12G for PreevA units
Download File
766.6 kB
Field Service - Damper Motor Replacement
Instructions for replacement kit (261697) for Belimo damper motor
Download File
161.8 kB
Field Service - Replacement of Discontinued Relays
Installation for kits designed to replace relays no longer available from suppliers. Applies to all Reznor units using obsolete relays.
Download File
340.4 kB
Opération - Série PreevA
Opération, maintenance et réparation PreevA ® Modèles RHH, SHH,  PDH, PEH, PXH, SDH, RDH, REH, et RXH
Download File
2.2 MB
Manuel d'installation: de Plein Air (modèle PreevA)
Installation / opération de traitement d'air extérieur
Download File
3.7 MB

Other Files
1 File

Other Files

Warranty Statement
Reznor equipment limited warranty statement
Download File
183.4 kB

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