Modular Rooftop Filtered Make-Up Air Fan


The air handler unit is the heart of the modular fan system. It is designed to deliver fresh outside make-up air for installations requiring frequent air changes. Units are designed for indoor or outdoor applications, and are available in vertical or horizontal discharge configurations.

To satisfy a variety of installation and climatic requirements, packages are available in a number of configurations. Possible configurations include the addition of either a v-bank or an evaporative cooler intake module and a direct fired or indirect fired heating module. All modules bolt together to form a rigid common base structure that mount onto a single curb structure or can be hung for indoor applications.

Combination packages that include both exhaust and supply fans mounted on a single roof curb are also available, please contact your sales representative for more information.

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  • Air Volume: 1 – 22,000 cfm
  • Maximum SP: 4" wg. @ standard air density
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  1. Vibration isolation
  2. High efficiency motors
  3. Compact weatherproof design
  4. Adjustable drive sheaves (belt drive units only)
  5. Horizontal or down discharge
  6. 2" washable filters
  7. Inlet screen
  8. G90 galvanized steel
  9. Large doors on both sides allowing for easy accessibility
  10. Disconnect switch
  11. Lifting points
  12. Speed control standard on direct drive units


  1. Gravity intake damper
  2. Motorized intake damper
  3. Roof curbs
  4. Wall mount kit
  5. Mixing box with damper control
  6. DX cooling coils
  7. Hot water/steam Coils
  8. Indoor hanging cradle
  9. Insulated housing
  10. Evaporative cooler intake
  11. VAV packages
  12. Extra set of V-Belts (belt drive units only)


The SA-RA Model has been certified by ITS. This certification mark indicates that the product has been tested to and has met the minimum requirements of a widely recognized (consensus) U.S. products safety standard, that the manufacturing site has been audited, and that the applicant has agreed to a program of periodic factory follow-up inspections to verify continued performance.

Model SA-RA is ETL Listed under file number J20029811-001 and complies with UL705 and CSA C22.2, No. 113 Standards.



  1. SA10RA Untempered Supply Unit with 10" Blower in Size #1 Housing
  2. SA10RAD Direct Drive Direct Drive Untempered Supply Unit with 10" Blower in Size #1 Housing with speed control, disconnect switch.
  3. SA12RA Untempered Supply Unit with 12" Blower in Size #2 Housing
  4. SA15RA Untempered Supply Unit with 15" Blower in Size #2 Housing
  5. SA18RA Untempered Supply Unit with 18" Blower in Size #3 Housing
  6. SA920RA Untempered Supply Unit with 20" Blower in Size #4 Housing
  7. SA925RA Untempered Supply Unit with 25" Blower in Size #5 Housing
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