Category: hvac
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Is This ESPHome HVAC Zone Controller Right for You?
Check whether a TekOnline ESPHome HVAC zone controller suits your dampers, wiring and Home Assistant setup before choosing a board revision.
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Can I Replace My iZone System with an ESPHome HVAC Zone Controller?
Considering an iZone retrofit? Check damper voltage, wiring, AC controls and proprietary interfaces before selecting a TekOnline ESPHome zone controller.
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How to duty cycle HVAC zones with Home Assistant
Learn how to duty-cycle compatible HVAC zones with Home Assistant. Understand relay cycling and how it differs from V3 timed partial damper positioning.
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ESP32 Flashing Cheat Sheet
Practical commands for flashing and recovering ESP32 boards in this repo on Windows. Tool Check On this machine, ESPHome is available via python -m esphome and esptool via python -m esptool. Checked locally on 2026-03-21: ESPHome 2025.12.2, esptool…
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Earlier 4-Zone Button Wall Controller: Project Archive
Archive of the earlier TekOnline four-zone button wall-controller project. Find its current product page and the separate upcoming touchscreen preview.
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How To Re-Flash the TekOnline 7-Zone HVAC Controller From Home Assistant
Historical TekOnline seven-zone firmware reflashing guide. Confirm your board revision before using the instructions or choosing current V1, V2 or V3 firmware.
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Well that is a little more than usual 😅
Just putting this up more of a reminder to my future self. This was from the HVAC Zone Controller and promoting it on the Facebook Home Assistant group.…
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ESPHome 7-Zone HVAC Controller – Smart 24VAC Zone Control for Home Assistant
Explore the original TekOnline seven-zone ESPHome controller project and its local Home Assistant integration, with links to the current eight-zone V3.
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Zone Control (7 Zones) – Open-Source ESPHome HVAC Controller
Historical overview of TekOnline seven-zone ESPHome control. Identify your board revision and find the current eight-zone V3 product and setup resources.
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Installer Perspective: Deploying Open HVAC Zone Control Without the Usual Pain
An installer-focused overview of open HVAC zone control. Review wiring, board revisions and commissioning requirements before planning an ESPHome retrofit.