Products Air Handlers RHH




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 ( 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
824.4 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: 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: 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
144.7 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
General Product Brochure
Overview brochure covering the Reznor product line.
Download File
1.6 MB

Technical Data
2 Files

Technical Data

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

12 Files


Unit Installation Manual - Outdoor PreevA
Installation manual for Models RDH, REH RHH, & RXH
Download File
2.7 MB
Parts Manuals - PreevA - Replacement Parts
Replacement parts for PreevA, Models PDH, PEH, PXH, RDH, REH, RHH, RXH, SDH, & SHH
Download File
5.5 MB
Option - Installation - Roof Curbs Assembly
Instructions for installing roof curb for various models
Download File
1.6 MB
Option - Installation - Remote Display
Installation instructions for optional remote mounted display for PreevA & MAPS Series, and Model ZQYRA
Download File
335.8 kB
Controls - PreevA D21 Control Manual
PreevA digital control D21, makeup air control for air hanlder systems.
Download File
1.2 MB
Controls - PreevA D19 Control Manual
Digital controller D19 for space temperature control for PreevA air hanlder systems.
Download File
1.2 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
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
964.6 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

Other Files
1 File

Other Files

Warranty Statement
Reznor equipment limited warranty statement
Download File
183.4 kB

Case Study : HVAC Rooftop Unit Energy Savings

Northwest Energy Efficiency Alliance Rooftop HVAC Pilot Program: Raising the Roof for Energy Savings