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- Model: COMUSET1
COMUNELLO SMART20 + AF820 Set – smart ventilation for reducing radon levels
Have you ever wondered what kind of air circulates through your home when the windows are closed? Radon is invisible and odorless, yet it can silently accumulate in the spaces where we live, sleep, and where our children play. If we cannot see it, we must control it differently – with controlled ventilation.
That is why the COMUNELLO SMART20 + AF820 set is here – a chain window actuator and a WiFi module that together create a smart system for automatic ventilation and reducing radon levels in living areas and basements. No construction work, no complicated installations, with one clear goal: healthier and safer air in your home.
Why choose the COMUNELLO SMART20 + AF820 set?
Because air needs movement, and you need a system that works for you. The set enables regular window opening at precisely defined intervals, turning ventilation into a routine and not a daily obligation you have to remember.
- Targeted radon reduction through regular, controlled ventilation
- Automatic window opening with the SMART20 chain actuator
- Smart control via the AF820 WiFi module and app
- Multiple ventilation cycles per day – typically 10–15 minutes each
- No construction work needed – no ducts, no drilling through walls
- DIY-friendly installation even for users with basic technical skills
How the set works – one kit, two smart units
Each set includes 1× COMUNELLO SMART20 chain actuator and 1× COMUNELLO AF820 WiFi module. The actuator opens and closes the window, while the module provides power and smart control.
In the app you set how often and for how long the window opens – for example several times a day for 10 to 15 minutes. This ensures regular air exchange and allows radon to escape from the building. The system works automatically, allowing you to continue your daily routine.
SMART20 – reliable chain actuator for daily ventilation
The COMUNELLO SMART20 chain actuator is a compact yet powerful unit designed for automatic window opening and closing. It is ideal for multiple daily openings, which is key for reducing radon levels.
- Power supply: 230 V AC
- Maximum force: approx. 200 N (suitable for most standard windows)
- Chain stroke: adjustable approx. 180–380 mm (DIP switches)
- Chain type: double-link chain for stable opening
- Comfort functions: soft-start, soft-stop, automatic obstacle detection
- Use: various window types (top-opening or bottom-opening)
The actuator operates quietly and smoothly, making it suitable for living rooms, bedrooms, and basements where automated daily ventilation is required.
AF820 – the WiFi module that makes your window smart
COMUNELLO AF820 is the central smart unit of the system. It powers the actuator and connects it to your home network so you can control it through the mobile app.
- Power supply: 110–240 V AC
- Output: up to 500 W for powering the actuator
- Connectivity: WiFi 2.4 GHz + 433.92 MHz radio
- Control: OneSmart mobile app
- Supported: voice assistants (e.g., Google Home, Amazon Alexa)
- Additional inputs: 2 wired sensor inputs (switch, sensor, etc.)
Through the app you can create multiple ventilation intervals throughout the day, customized by time, day of the week, or season. This adapts ventilation to real room usage and reduces radon where it matters most.
Installation without construction work – ventilation with two sets
One of the key advantages of the system is that it requires no construction work. All you need is a suitable window and a standard 230 V socket to power the actuator and WiFi module.
- Mount the SMART20 actuator onto the window sash and frame
- Connect the AF820 to power and link it to the actuator
- Configure the app and set up the ventilation schedule
DIY installation is possible – basic hand tools and following the included instructions are enough.
For the most effective radon reduction we recommend using two sets: one on each side of the building on the same level. This creates a cross-ventilation airflow, significantly improving natural radon removal.
Key advantages of the COMUNELLO SMART20 + AF820 set
- Automatic window opening for reducing radon levels
- Multiple ventilation intervals per day (recommended 10–15 minutes)
- No construction work – uses existing windows
- DIY-friendly installation
- Smart control via the AF820 WiFi module and mobile app
- Quiet and reliable SMART20 chain actuator
- Option to create cross-ventilation with two sets
Important: The COMUNELLO SMART20 + AF820 system enables regular and controlled ventilation, helping to reduce radon levels in the building. In areas with very high radon concentrations, additional professional mitigation measures may be required.
Who is this set intended for?
- Homeowners and apartment owners seeking long-term radon reduction
- Owners of basements and semi-basements where radon most often accumulates
- Small business premises and offices where air quality is part of responsible operation
- Anyone looking for an elegant ventilation solution – without noisy fans or major construction work
If you already use a radon detector, this system is the natural next step: once you know the levels, you need a tool that can actually influence them.
Order the COMUNELLO SMART20 + AF820 set
Make this your next step toward a safer and more controlled indoor environment. One set automates window ventilation, while two sets create cross-ventilation, which more effectively helps reduce radon levels.
We have tested this technology and trust it. Are you ready for your home to truly breathe?
