ESPHome HVAC Zone Controllers
Purpose-built 24VAC relay boards for Home Assistant. Control your ducted air conditioning, dampers, and valves with open-source ESPHome firmware. Designed and shipped from Australia.
Which controller is right for you?
8-Zone V3 — Roof Space (New)
$169 AUD
- Calibrated positional damper control — approximate percentage positions
- Onboard current monitoring and startup diagnostics
- 3.3V TTL UART expansion header for advanced integrations
- 8 fully working 24VAC zones
- ESPHome + Home Assistant native
- Best for: multi-zone ducted systems with finer airflow balancing
4-Zone — Wall Mount
$230 AUD
- 4 zones with illuminated physical buttons
- PWM button-light feedback shows zone levels
- In-wall form factor — replaces your existing wall panel
- Slow-PWM duty cycling for compatible dampers
- Replaces SZ-SW4, CLIP24 compatible
- Best for: smaller systems, wall-mount preference
8-Zone V1 — Budget
$130 AUD
- Original proven 8-zone design
- Same core zoning capability
- ESPHome + Home Assistant support
- Best for: budget-conscious builds
Why choose TekOnline zone controllers?
- Open source — ESPHome firmware. No vendor lock-in. No cloud dependency.
- Purpose-built — Designed for 24VAC HVAC systems, not generic relay boards.
- Australian designed & shipped — Ships from Queensland. Typical delivery 2-5 days within Australia.
- Community-driven — Active in the Home Assistant community. Firmware updates based on real user feedback.
- Compatibility checked — Not sure it fits? Send us your controller details before ordering.
Setup Guides & Resources
Worldwide shipping available. USA, UK, EU: 7-14 business days. Contact us for international shipping quotes.
Wiring & compatibility
Have a standard 24VAC three-wire damper? Start with the 24VAC three-wire damper wiring guide, then use the compatibility matrix to choose a controller.
V3 ESPHome firmware and timed positioning
View the V3 controller, read how timed damper positioning works, or download the V3 ESPHome firmware. Check damper compatibility before installation.
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