# HVAC - Daikin VRV (bacnet,KNX or modbus)?

**URL:** <https://community.openhab.org/t/hvac-daikin-vrv-bacnet-knx-or-modbus/38916>\
**Category:** Beginners\
**Tags:** hvac\
**Created:** [January 18, 2018, 8:13am UTC](https://community.openhab.org/t/hvac-daikin-vrv-bacnet-knx-or-modbus/38916 "2018-01-18T08:13:50Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![bahnepo](https://community.openhab.org/letter_avatar_proxy/v4/letter/b/8797f3/32.png) [@bahnepo](https://community.openhab.org/u/bahnepo)\
**Post date:** [January 18, 2018, 8:13am UTC](https://community.openhab.org/t/hvac-daikin-vrv-bacnet-knx-or-modbus/38916/1 "2018-01-18T08:13:50Z")

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Hi,

I am planning my openHAB installation - One of the key functions is controlling my HVAC VRV system (3 units on one bus).

How does support rate for each of bacnet, KNX or modbus? I can choose any of the interfaces for the system.

Apologies if this is in the wrong place

D