HOLTOP AV-TTW5-W NCIE15CO2 Single-room heat recovery ventilator with WiFi CO2 sensor for 15-25 cm wall

The HOLTOP AV-TTW5-W is a decentralised single-room heat recovery ventilator designed for wall installation. It fits walls between 15 and 25 cm thick and can be fitted retrospectively in much the same way as a conventional wall fan, making it a practical choice for container homes, lightweight timber-frame houses and modular buildings. Its white body features a design front panel.

At its core is a patented ceramic-ball heat exchanger, which the manufacturer rates at up to 97% heat recovery efficiency. It includes an antibacterial coating and easily replaceable filters. The low-noise EC motor draws 12 W and delivers up to 80 m³/h of airflow, suitable for rooms of around 20 m². Three speed settings and switch control provide straightforward operation.

Built-in WiFi allows control from a smartphone and integration with the Tuya smart home system, and a remote control is included. A CO2 sensor adjusts ventilation to air quality, while the motorised automatic shutter closes when the unit is off to keep out cold, dust and noise.