Tools to automate home heating and cooling

The problem, in plain words: “My energy bills are too high and I want to automate my home's heating and cooling to save money.”

Home Assistant fits best, with 1 more that fits too.

You want to automate your home's heating and cooling to lower monthly energy bills.

Updated July 2026.

What fits

Home Assistantstrong · 90

Home Assistant is an open-source home automation platform built to connect hundreds of devices and run local automations; its core purpose is automating heating, cooling and other systems so you can implement schedules, presence-based setbacks and energy-saving routines.

Best for: Homeowners who want a flexible, privacy-focused automation hub that can centralize thermostats, sensors and energy-saving automations.

CN105-2HA Mitsubishi AC Controllerstrong · 78

This CN105 + ESP32 assembly is designed specifically to let Mitsubishi air conditioners be controlled from Home Assistant, so its primary purpose is enabling automated control of those Mitsubishi units for scheduling and remote operation.

Best for: Homeowners who own Mitsubishi AC units with a CN105 port and who want to integrate them into a Home Assistant automation setup.

Caveat: Designed for Mitsubishi systems with a CN105 port, so it won't work with air conditioners that lack that interface.

Partly fits

Personalized Energypartial · 55

This service is focused on finding electricity plans tailored to your usage to reduce bills, which addresses cost reduction but doesn't automate HVAC equipment.

Won’t cover: Helps lower electricity costs through plan selection rather than by directly automating heating or cooling systems.

Denky D4 ESP32 Teleinfo Readerpartial · 52

Reads French Teleinfo energy meters and forwards data into Home Assistant for energy monitoring, which helps you see consumption but does not itself automate HVAC control.

Won’t cover: Provides detailed meter readings for energy visibility but does not directly control heating or cooling systems.

Open AIR Mini (Ventilation Controller)partial · 52

An open-source controller built to add smart control to specific ventilation units, letting owners automate ventilation schedules and integrate them into a broader home automation setup.

Won’t cover: Targets specific Ducobox/Orcon ventilation units, so it addresses ventilation control rather than whole-home heating and cooling for every HVAC system.

wM-Bus Gatewaypartial · 50

This gateway brings wireless meter and sensor data into Home Assistant so you can monitor energy usage, but it is focused on data collection rather than directly commanding HVAC equipment.

Won’t cover: Captures meter and sensor data for visibility but doesn't itself provide thermostat control or HVAC actuation.

Questions

What's the best tool to automate home heating and cooling?

Home Assistant is the strongest match — Home Assistant is an open-source home automation platform built to connect hundreds of devices and run local automations; its core purpose is automating heating, cooling and other systems so you can implement schedules, presence-based setbacks and energy-saving routines.

Is there a tool that fully solves this?

2 products match this closely.

What won't these tools cover?

Provides detailed meter readings for energy visibility but does not directly control heating or cooling systems. · Captures meter and sensor data for visibility but doesn't itself provide thermostat control or HVAC actuation. · Targets specific Ducobox/Orcon ventilation units, so it addresses ventilation control rather than whole-home heating and cooling for every HVAC system. · Helps lower electricity costs through plan selection rather than by directly automating heating or cooling systems.

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