REH with AR8 Dampers
REH horizontal discharge


Reznor's REH (Preeva) is the new outdoor electric heat ventilation air handler. The REH comes in 4 cabinet sizes featuring a total of 12 electric heat sizes to meet the ventilation needs. When matched with the controls, the air handler provides precise heating for standard room heating to 100% outside air ventilation applications.

  • All published airflow data and sound data are supported by AMCA tested and rated airflow performance curves
  • Complies with ASHRAE Standard 90.1

 The Preeva REH design features include factory-assembled, modular sections - a draw-through cooling coil cabinet module with either chilled water or DX coil and an inlet air mixing box module with a variety of configurations and damper options.

The optional dH cooling module also provides dehumidification of 100% outside air or a mixture of outside/return air. The self contained dedicated Re-Heat pump provides 13 F -20 degree F reheat temperature rise from the main evaporator coil discharge. The DX cooling coils are optimized for best performance when the reheat pump is on and off. For precise control, modulating reheat can be added. A complete heating and cooling advanced digital control package is available in addition to common industry standard analog heating only and makeup air controls.

Capacità di riscaldamento ( kW )

Campo di raffreddamento ( MBH )

Campo di portata d'aria ( CFM )


  • ETL certification
  • Double wall Cabinet with Insulation
  • Pre-coat white gloss cabinet finish, 60 gloss minimum and RAL 9001, meets ASTM B117 specification for salt spray for 1,000 hours
  • 20-75 degree F temperature rise
  • Circuit breaker protected transformer for 24-volt controls
  • Integrated circuit board with diagnostic indicator lights
  • 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 Airflow pressure switch to verify circulating blower operation on makeup air options
  • 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
  • Three hinged service doors with heavy duty hardware
  • Engineeered condensate management
  • Four point lift eyes on base of unit
  • Slab or roof mounting
  • Heavy gauge steel base

Factory Installed Options

  • Controls
    • Space Temperature Heating only
      • Analog single or two-stage gas valve with room thermostat control (thermostat is available as a shippedseparate accessory or may be field-supplied)
    • Space Temperature Heating/Cooling
      • Digital two-stage heating/three-stage cooling with room command module
      • Digital electronic modulation heating three-stage cooling with room command module, reheat control, reheat control
    • Discharge Temperature Heating/Cooling Makeup Air
      • Digital two-stage heating/three-stage cooling with room command module reset
      • Digital electronic modulation heating three-stage cooling with room command module reset, reheat control
  • 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
    • No insulation; single or double wall with standard or high R-value insulation
    • Blower cabinet screen, inlet duct connection flange, or inlet on/off damper with duct flange
    • Discharge duct flange
  • Mixing Box Module
    • five inlet configuration combinations including top, bottom, and rear
    • manual, motorized 2 or 3 position, or motorized modulating return air or outside air and return air dampers
    • direct-coupled 24VAC damper actuators
    • damper control selections such as 0-135 ohms resistance potentiometer, building pressure, or 0-10 v control
  • Blower Motor (1/4 to 5 HP) - see pressure drops and blower charts
    • open dripproof, TEFC, premium efficiency, or 2-speed open dripproof
    • 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 fins (coated or uncoated) - non-ozone depleting, R410A refrigerant
    • DX coil module with dehumidification control. Single, dual and 1/3-2/3 circuit; Galvanized or stainless casing; Copper or aluminum fins; Coated and uncoated; Modulating or standard reheat control
    • chilled water coil (3-45 tons; 1/4, 1/2, 3/4, or full circuiting; galvanized or stainless casing; copper or aluminum fins (coated or uncoated)
  • Evaporative Cooling Module
    • white pre-painted or 300 series stainless steel cabinet
    • 300 series stainless steel reservoir
    • recirculating pump or AquaSaver microprocessor-based, timed water distribution system
    • 6" or 12" CELdek or optional Glas-dek® UL 900 Class II noncombustible media
    • 1" or 2" aluminum pre-filter
    • freeze protection kit (factory-installed)
    • automatic fill and drain kit (field-installed)
    • water hammer arrestor (field installed)
  • 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

Field Installed Options

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


4 Files


Split System Marketing Catalog
Split Systems Marketing Catalog
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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
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599.9 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
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486.7 kB
Heating, Cooling, Ventilation & VRF Product Line
Heating, Cooling, Ventilation & VRF Product Line Sheet
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607.6 kB

Dati Tecnici
2 Files

Dati Tecnici

Catalog - Split System
Commercial split systems catalog
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3.3 MB
Sample Specs - REH & RXH
Sample specifications for Models REH & RXH
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17.0 kB

Servizio / Installazione
12 Files

Servizio / Installazione

Unit Installation Manual - Outdoor PreevA
Installation manual for Models RDH, REH RHH, & RXH
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2.7 MB
Parts Manuals - PREEVA
Replacement parts for PREEVA Models PDH, PEH, PXH, RDH, REH, RHH, RXH, SDH, and SHH
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10.5 MB
Option RB5 - Installation - Remote Display
Installation instructions for optional remote mounted display for PreevA & MAPS Series, and Model ZQYRA
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335.8 kB
Option - Installation - Roof Curbs Assembly
Instructions for installing roof curb for various models
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1.6 MB
Parts Manuals - Functional Replacement Fan/Blower Controls and Limit Controls
 Parts manual for functional replacement fan/blower controls and limit controls
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322.8 kB
Controls - D19, D21, and D22 Control Manual
Air handler system control options D19, D21, and D22
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1.2 MB
Operation - PreevA
Operation, maintenance and service manual for PreevA systems, Models SHH, RXH, RDH, REH, PXH, SDH, PDH, & PEH
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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
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766.6 kB
Field Service - Damper Motor Replacement
Instructions for replacement kit (261697) for Belimo damper motor
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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.
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340.4 kB
Opération - Série PreevA
Opération, maintenance et réparation PreevA ® Modèles RHH, SHH,  PDH, PEH, PXH, SDH, RDH, REH, et RXH
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2.2 MB
Manuel d'installation: de Plein Air (modèle PreevA)
Installation / opération de traitement d'air extérieur
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3.7 MB

Altri File
1 File

Altri File

Warranty Statement
Reznor equipment limited warranty statement
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183.4 kB