A ductless decentralised HRV system for efficient indoor air exchange with concealed in-wall installation. Now also available with grilles exit on the side of the window frame, even more invisible.
An invisible HRV, which combines excellent air exchange and purification performance with zero footprint: “disappearing” inside the wall, Flow40 does not require piping or false ceilings and leaves only the front cover visible.Single-room ventilation allows you to adjust functions and performance based on the actual needs of each room, ensuring efficient system management and personalised comfort.
Price upon request
With Flow40 we can integrate an air exchange system even with no space available for ducting and technical compartments. The ductless design requires no air network adjustment, simplifying the commissioning and long-term management of the system.
Alessio C. - technical manager, F.lli Beltrame
Flow40 offers all the benefits of Heat Recovery Ventilation, simplifying the design and minimising the aesthetic impact, dimensions and maintenance.
The use of prefabricated components and the absence of air distribution networks makes this wall-recessed HRV system particularly easy to design and versatile to install during residential renovation or energy upgrading.The Flow40 ventilation system can be installed on walls of variable thickness (minimum 335 mm), both with plaster finish and with insulation.
The special cross-flow enthalpy heat recovery system allows Flow40 to recover up to 91% of the heat contained in the extracted air flow, avoiding the energy losses that would occur with the introduction of cold air. By also recovering some of the latent moisture content, it ensures the intake air is never too dry.
Acoustic comfort is assured thanks to advanced facade noise abatement and sound pressure levels of just 18dB at first speed. The absence of air ducts avoids acoustic bridges and noise transfer between rooms.
The HRV unit is also equipped as standard with a hygrometer for continuous monitoring of relative room humidity allowing for an automatic and more efficient regulation of forced ventilation to combat condensation and mould.
The CO2 and VOC sensor and monitoring app (available in the Pure version) mean extensive control of indoor air quality at any time of the day.
Helty Flow 40 HRV with grilles exit on the side of the window frame is the innovative concealed solution that is even more invisible and discreet, thanks to the possibility of managing the grille exits directly in the window shoulder.
A system that has no visible impact on the facade, preserving the integrity of any type of building. Flow 40 with light exit is an interesting and versatile option for major renovations and new construction sites in contexts that require special attention to architectural aesthetics. The system can also be planned in the construction phase alone, to be completed at a later date as required.
| Characteristics | U.M. | Value | |||||||||||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Airflow | m3/h | 10/17/26/37/42 (1) | |||||||||||||||||||||||||||||||||
| Airflow adjustment | 4 settings + high-speed ventilation | ||||||||||||||||||||||||||||||||||
| Power consumption (2) | W | 3.6 - 20.0 | |||||||||||||||||||||||||||||||||
| Supply voltage | V AC | 230 | |||||||||||||||||||||||||||||||||
| Max. current consumption (3) | A | 0.17 | |||||||||||||||||||||||||||||||||
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Would you like to learn more about the concealed Helty Flow40 MVHR system and understand how it can be integrated into your project? Explore the new 3D configurator dedicated to Flow40: an interactive experience that offers a virtual tour of the solution, with specific insights into the installation, use, and maintenance of the MVHR system.
*For the best experience, we recommend browsing from a desktop device.
Do you need to discuss a project involving a heat recovery ventilation system? Would you like to evaluate an offer with this innovative system?
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Installing a concealed HRV system requires a creating a recess in the perimeter wall where the ventilation system will be positioned, which needs to served by the power supply. The hole dimensions are available in a reserved area.
Flow40 concealed HRVs require a perimeter wall with a minimum thickness of 335mm. Flow70 and Flow100 systems require perimeter walls with a minimum thickness of 460mm.
An enthalpy heat exchanger recovers both the sensible thermal energy (the heat) and the latent energy (the humidity) from the air flow. It has the advantage of offering better overall energy efficiency without over-drying the incoming air.
The performance of the Helty ventilation systems are recognized by the Casa Clima Quality Seal and have obtained the SIMA and BioSafe validations
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