CoolMasterNet HVAC Interface


Available on back-order

CoolMasterNet is a universal communication bridge that allows VRF/VRV heating, ventilation, and air conditioning systems connectivity. Furthermore, the solution enables integration to centralized control systems, such as home automation, voice control devices and remote control mobile app.

Use CoolMasterNet and allow your customers to control their high-quality air conditioning system via a single home automation control panel.?Bypass multiple protocol communication challenges with one device and save yourself a lot of time.?Now you can integrate even if you have more then one HVAC brand installed. Just use CoolMasterNet and connect the compatible brands to one control panel.

CoolMasterNet HowItWorks copy

Plug and Play installation

  • CoolMasterNet bridge is easily connected to VRF/VRV outdoor-indoor communication bus.
  • Connectivity by industry standard physical layers: RS232, RS485, Ethernet and KNX
  • No setup is required. For optional settings (static IP, etc.) a setup utility is available.
  • Autodetect of all connected HVAC units

CoolMasterNet supports all of the existing brands of VRF / VRF such as Daikin, Mitsubishi, Toshiba, Fujitsu, LG, Hitachi, Gree and many others, with one hardware platform,

CoolMasterNet supports all major home automation systems, such as Fibaro, Push, Control 4, Savant, Lutron, Elan, Philips Dynalite, RTI, URC and many others.



Available on back-order

  • Seamless integration of HVAC systems with all major home automation/BMS controllers e.g. Fibaro, Control4, Crestron, AMX, RTI, Savant, Vantage and others
  • No delay in response when retrieving data (updated status) from the HVAC units
  • All HVAC brands support e.g. Daikin, Gree, Hitachi, LG, Mitsubishi Electric, Mitsubishi-Heavy, Panasonic/Sanyo, Samsung, Toshiba, Fujitsu and many others
  • Connectivity standard physical layers: RS232, RS485, Ethernet, using simple well documented ASCII protocol
  • Industry standard interfaces: Modbus RTU (RS485), Modbus IP, Bacnet IP, Bacnet MSTP(RS485) for commercial applications
  • Simultaneous multi-brand HVAC support (option)
  • Touch screen display, for ease of setup, backup control and monitoring, configuration, service and indication
  • Configurable I/O?s (option)
  • Full control & monitoring of all connected HVAC indoor unit operation
  • CoolRemote.net ? a web app that allows remote access from Smartphone, Tablet and PC platforms. (app.coolremote.net)
  • HVAC systems diagnostics and service by technical data access, locally and remotely through a web app (optional)
  • Direct KNX networks connectivity
  • Cloud integration by API (future development)

C-Bus Integration

CoolMasterNet supports C-Bus Network Automation ControllerC-Bus Network Automation Controller (5500NAC). This module integrates to the CoolMasterNet controller via ethernet using Lua inside the 5500NAC/SHAC.

CoolMasterNet Connectivity


CoolMasterNet SPEC1



CoolMasterNet supports the following brands:

Chigo (CG)
Daikin (DK)
Fujitsu (General) (FJ)
Gree (GR)
Haier (HR)
Hitachi (HT)
Intensity (MD)
Kentatsu (KT)
Midea (MD)
Mitsubishi Electric (ME)
Mitsubishi Heavy (MH)
Panasonic (PN)
Samsung (SM)
Sanyo (SA)
Toshiba (TO)
Trane (TR)
York (YK)

Please note:?For the full list of compatible Units see this link?Compatibility

Product Support


?CoolMasterNet Brochure
?CoolMasterNet Programmer Reference Manual (PRM)
?CoolMasterNet Quick Installation Guide
?CoolMasterNet Technical Data

Technical Specifications

Device type
?Data Bridge
Connection type
?RS232, RS485, Ethernet
?5V/175mA (via mini USB);
12V/120mA; 24V/70mA
?2.8″ / 240 x 320 / 262K
Operation Range
Operation Humidity
?0% ~ 96% non-condensing
Operation Temperature
?-10 + 60 C0
Storage Temperature
?-10 + 70 C0
?ABS 156x109x35
?FCC, CE (EN 60335-1, EN 60335-2-40)