4-Zone Wall Controller – 24VAC HVAC Control for Home Assistant

Description

Four-zone wall control, connected to Home Assistant

A four-zone wall controller for 24VAC HVAC zoning, ESPHome and Home Assistant. Replace a standard four-zone wall controller with four illuminated local buttons, four zone outputs and open Home Assistant integration. Ships from Australia with the current firmware and setup instructions available for USB-C first installation.

At a glance

• Controls four HVAC damper or valve zones.
• Local wall buttons keep zone control simple; Home Assistant adds dashboards and automations.
• ESPHome connects over 2.4GHz Wi-Fi. Core control does not depend on a vendor cloud.
• Controls the zones, while the existing HVAC indoor-unit and thermostat controls manage heating and cooling.

Check compatibility

Designed as a replacement for standard four-zone wall controllers, including SZ-SW4-style systems. Read the compatibility guide for the existing-controller list and wiring notes. Connector shape alone does not identify pin assignments.

Setup and help

First-time installation starts with a USB-C data cable and the 4-Zone setup guide. After flashing, provision Wi-Fi and add the controller to Home Assistant. Existing controllers can use the latest 4-Zone firmware page for OTA updates. For 24VAC actuator wiring, see the damper wiring reference. Customers can send their controller model and wiring photos for a fit check.

Current firmware

The latest published 4-Zone firmware is 17 May 2026: 2026.05.17-v2-hold-dimmer-unique-spill-invert. Use the latest firmware page for the public YAML and update instructions.

Quick FAQ

Do I need Home Assistant? No. The four front buttons control their zones locally. Home Assistant adds app-based control and automations.

Does it control the air conditioner itself? No. It replaces the wall-mounted zone controller and operates the zones; keep the existing thermostat and indoor-unit controls.

How many zones does it control? Four zones.