Smart-home piecesSwitchBot

SwitchBot Bot, triggered by the Meter Pro CO2

A small arm that presses a wall control’s boost button when a SwitchBot Meter Pro CO2 passes a level. No wiring.

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At a glance

  • Plain fact: Switches on your monitor’s reading
  • In its favour: No wiring: it presses the buttonSwitchBot’s app can use the Meter Pro CO2’s level as an automation condition.
  • Worth knowing: A boost button usually runs a timerOften 20 minutes, then the unit goes back to normal even if CO2 is still high.
  • Plain fact: Needs a SwitchBot hub and the monitor on USB powerA Hub Mini, Hub 2 or Hub Mini Matter Enabled, app 9.0 or later. On batteries the monitor updates only every 30 minutes.
  • Not stated by the maker: Whether it works without the internet isn’t documented

Setting it for a bedroom

HouseExhale’s setting: switch up at 750 ppm and back at 650, or ramp from 600 to full by 750. Never above 800.

  1. In the SwitchBot app, make an automation: when CO2 is above 750 ppm, the Bot presses the boost button.
  2. Keep the Meter Pro on USB power so it updates every minute.

A Danish study ran a bedroom fan from about 900 ppm and the nights still averaged 835, so a control has to start below the goal. Good home CO2 sensors are rated within about 55 to 90 ppm at 800, and the night average includes the climb after bedtime, so 750 on and 650 off leaves room for both. A control in the return duct mixes the bedroom with empty rooms, so it needs lower settings still (about 650 on, 550 off), and your monitor in the bedroom has the final word. These are HouseExhale’s numbers: no study has tested a control against an 800 night average yet.

What it works with

Documented for: Any unit whose wall control has a boost button the Bot can press. No ventilator maker documents it.

How to add CO₂ control to an HRV or ERV · HRV and ERV units

Specs

Needs
SwitchBot Meter Pro CO2, a SwitchBot hub, the SwitchBot app
Pairs with
A wall control with a boost button

From the maker’s documents, read October 17, 2026. Prices are before tax and shipping and change often.

Smart-home pieces

Use a monitor you already own to switch high speed. Not documented by any ventilator maker: low-voltage inputs only, and check your manual first.

Sources