The HOLTOP Comfort Fresh Air 350T central heat recovery ventilator raises indoor air quality and energy efficiency to a new level. With optional smart control, high heat recovery efficiency and quiet operation, the system provides fresh, oxygen-rich air while minimizing energy loss, thus providing the perfect balance of comfort and sustainability.

Advanced heat exchanger technology
HOLTOP's unique, 3D cross-counterflow heat exchanger is made of a special resin-reinforced ABS structure, which is extremely airtight, mold-resistant and ensures a lifespan of up to 15 years. The large heat transfer surface results in maximum efficiency, while the ENTALPIA heat exchanger versions are capable of vapor recovery of up to 80%. This solution is particularly useful in winter to avoid excessive air dryness and in summer to reduce excess humidity.

Smart control and WiFi function (optional)
The device has the most modern smart control technology, which can be controlled remotely via WiFi connection with the Smart Life application (Android / iOS). Users can monitor and control indoor air quality, including temperature, humidity and CO₂ levels, from anywhere. The system is capable of group and linked (linkage) control, simultaneous control of several ventilation units and other Tuya IoT devices.
Intelligent functions include weekly timing, automatic bypass, humidity control, filter replacement indication, and energy consumption display.

Excellent energy efficiency and quiet operation
EC motors provide constant air flow with four speeds, while operating with low energy consumption and a noise level of only 31-35 dB(A). The system has an A or A+ energy efficiency class and ensures stable air exchange down to an external temperature of -25 °C. The 100% automatic bypass function enables natural ventilation in the case of cooler outdoor air in the summer months.

Flexible installation and maintainability
The compact, EPP-insulated housing provides a lightweight yet durable structure that resists heat loss and corrosion. The device can be installed on the left or right side, so it can be easily adapted to any installation situation.
The standard equipment includes the G4 filter, if required it can also be supplemented with an F7 fine filter, which is ideal for dusty, pollen-contaminated environments. The system is easy to clean, the heat exchanger is washable and requires low maintenance in the long term.

Why is the plastic plate heat exchanger better than devices with paper (cellulose) or aluminum plate heat exchangers, which are often cheaper?

Higher heat recovery efficiency:
Depending on the type, around 90-95%.

Long service life, trouble-free operation
There is no corrosion, the moisture content of the air does not harm it even in the long term - it works just as efficiently even after years.

Easy to clean and hygienic
It is easy to wash, so you always have fresh and clean air in your home - unlike paper heat exchangers, which cannot do this.

Weather and environment resistant
It remains reliable even with high humidity and a lower or higher salinity of the air, under which conditions aluminum or paper heat exchangers can easily be damaged.

Safety and health
Condensation quickly evaporates from the smooth plastic surface, so there is less chance of clogging, mold and unpleasant odors.

Sturdy yet flexible
It is more resistant to mechanical loads and vibrations, making it a stable choice in the long term.

Lower flow loss
Compared to solutions with paper heat exchangers, there is less resistance in the air flow, which enables more energy efficient ventilation.

ASSESSMENT, CONSULTATION, EXECUTION!
The advantages of ventilation devices with a heat recovery function:

Health and hygiene:
- continuous and automatic air exchange
- the concentration of certain "polluting" substances harmful to health does not increase in the apartment. respectively it cannot enter from the outside either (formaldehyde, volatile organic compounds, etc.);
- radon concentration that can be kept at a low level,
- mold formation can be prevented;
- air of optimal quality and composition, allergen-free environment.

Comfort:
- draft-free environment and lower temperature fluctuations;
- adequate humidity;
- an interior free of mosquitoes, flies and other flying insects;
- the noise level infiltrating from the outside can be kept at a low level;
- an environment free of unpleasant odors;
- automatic and extremely quiet operation.

Energy certificate:
- for ventilation of buildings and apartments with the highest energy efficiency, with A or A+ energy classification.

Security:
- can be used to avoid damage caused by sneaking thieves taking advantage of open doors and windows typical of traditional ventilation.

Savings:
- energy saving thanks to the design equipped with fans with low power consumption;
- heat recovery