New models available!
  • Higher flow: Up to 2000 CFM
  • More power: Up to 35 kW
  • Better precision: Centrifugal ECM fans
ABOUT

CMU – Compact Make-up Air Unit

Neptronic's Compact Make-Up Air Unit (CMU) is equipped with advanced control strategies and a variety of size options to accommodate a wide range of HVAC applications. The CMU maximizes efficiency and enhances indoor air compensation, ensuring superior performance in HVAC system management. Equipped with Electronic Airflow Sensors (EAS), the CMU delivers precise temperature readings and integrates seamlessly with other building management systems with BACnet MS/TP and Modbus RTU communication protocols. Now, users can monitor supply temperatures, configure temperature setpoints based on airflow requirements, and receive alarm notifications.

CMU main image

Technical Drawing

Benefits of the Neptronic CMU

  • Enhanced airflow capacity, delivering up to 2000 CFM (3400 m³/h).
  • Handles up to 2-inch W.G. resistance within air ducts.
  • Supports unit power up to 35 kW, accommodating diverse HVAC requirements.
  • Wide voltage range between 120V/1ph to 600V/3ph, ensuring compatibility with different power systems.
  • Available in sizes from 6 inches to 20 inches.
  • Features Electronic Airflow Sensors (EAS) for accurate airflow monitoring.
  • Offers multiple I/O support and integration with exhaust fans for optimized ventilation.
  • Equipped with powerful EC motors, along with axial and centrifugal fans
  • Compatible with BACnet MS/TP and Modbus RTU protocols, facilitating easy integration with building automation systems.
  • Simplified operation and maintenance.
APPLICATIONS

Typical Applications

Condominiums and Apartment buildings

Condominiums and Apartment buildings

  • Improves indoor air quality with fresh
    incoming air
  • Provides cost-effective tempered air
  • Reduces odors and air contaminants
  • Keeps tenants comfortable and healthy
Commercial Kitchens and Restaurants

Commercial Kitchens and Restaurants

  • Optimizes exhaust hood fan ventilation
  • Improves cleanliness of kitchens
  • Prevents dangerous back drafts like carbon monoxide
  • Avoids negative air pressure
Gyms

Gyms

  • Provides more oxygen from outside for successful workouts
  • Reduces unwanted odors and bacteria
  • Improves indoor air quality for staff and visitors
  • Increases comfort with cost-effective tempered air
Garages

Garages

  • Reduces stuffiness of enclosed spaces
  • Adjusts temperature cost-effectively to compensate for wide door openings
  • Eliminates odors, dust and air contaminants
  • Reduces negative air pressure and back drafts
 Storage Spaces

Storage Spaces

  • Replaces stuffy air with fresh outdoor air
  • Adjusts temperature cost-effectively to compensate for wide door openings
  • Eliminates odors, dust and air contaminants
  • Reduces negative air pressure and back drafts
Battery Charging Rooms

Battery Charging Rooms

  • Lowers hydrogen gas concentration
  • Reduces air explosiveness
  • Prevents dangerous chemical back drafts
  • Adapts temperature for specific battery
    needs
SPECIFICATION

Technical Specification

Collar Size (in) Power Rating (kW) Voltage (V)
Air Flow
(CFM) [m3/h]
Axial Fan Centrifugal Fan
@ 0,05”WC (12,5Pa) @ 0,3”WC (75Pa) @ 0,25”WC (62,5Pa) @ 1,00”WC (250Pa)
06 1 | 1.5 | 2 | 3 120-1PH | 208-1PH | 208-3PH | 240-1PH | 347-1PH | 480-1PH | 480-3PH | 600-1PH | 600-3PH 118 [200] 80 [136] 218 [370] 120 [204]
08 2 | 3 | 4 | 4.5 |5 | 6 | 8 208-1PH | 208-3PH | 240-1PH | 347-1PH | 480-1PH | 480-3PH | 600-1PH | 600-3PH 304 [516] 225 [382] 325 [552] 250 [425]
10 3 | 6 | 7 | 8 | 9 | 10 | 12 208-1PH | 208-3PH | 240-1PH | 347-1PH | 480-1PH | 480-3PH | 600-1PH | 600-3PH 617 [1048] 450 [765] 471 [800] 383 [651]
12 6 | 8 | 10 | 12 | 14 | 16 | 18 | 20* 208-1PH | 208-3PH | 240-1PH | 347-1PH | 480-1PH | 480-3PH | 600-1PH | 600-3PH 717 [1218] 550 [935] 633 [1075] 433 [736]
* Select Models Only
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Technical Drawing

Technical Drawing
TYPE OF FANS

Axial Fan

Axial Fan
  • Used in standard applications with aluminum filters, in which there is a lower pressure drop.
  • Includes the option of an AC or ECM motor:

    - AC motor provides a cost effective solution, with simple installation and operation.

    - ECM motor provides advanced control strategies, with high modulation capabilities and better efficiency.

Centrifugal Fan

Centrifugal Fan
  • Used in applications with higher restriction on the filter, duct or zoning requirements, which result in a higher pressure drop.
  • Includes ECM motor:

    - ECM motor provides advanced control strategies, with high modulation capabilities and better efficiency.

CMU Axial Fan Performance (Imperial)

Axial Fan Performance (Imperial)

CMU Axial Fan Performance (Metric)

Axial Fan Performance (Metric)

CMU Centrifugal Fan Performance (Imperial)

CMU Centrifugal Fan Performance (Imperial)

CMU Centrifugal Fan Performance (Metric)

CMU Centrifugal Fan Performance (Metric)
FEATURES

Network Communication

  • BACnet MS/TP or Modbus RTU (selectable via DIP switch)
  • Select MAC address via DIP switch or via network

BACnet MS/TP

  • MS/TP @9600, 19200, 38400 or 76800 bps
  • BACnet scheduler (up to 6 events)
  • Firmware upgradeable via network
  • COV (change of value)
  • Copy and broadcast configuration to other devices via menu or network
  • Automatic baud rate detection
  • Automatic device instance configuration

Modbus RTU

  • Modbus RTU @9600, 19200, 38400 or 57600 bps
  • RTU Slave, 8 bits (configurable parity and stop bits)
  • Connects to any Modbus RTU master
BACNET-MODBUS-logo

Add-On Module

Ease of operation with Neptronic TDF digital room sensors

  • Display supply temperature
  • Configure CFM and temperature setpoints
  • Monitor alarms

Intelligent control strategies with ECM and AC fan options

  • Indoor air quality applications with integrated temperature, humidity and CO2 sensor
  • Interlock with extraction fans
  • Outside air sensors prime heater coils for fast response and comfort
  • Static pressure PID algorithms, control of fresh air and return air
Intelligent control strategies
CONTROLS

Accessories & Sensors for CMU