Valsir Ariosa units are high-efficiency mechanical ventilation systems with heat recovery (MVHR), designed for residential and light commercial applications. Offering airflow capacities up to 600 m³/h.

Each unit is equipped with EC fans for constant airflow regulation, a cross-counterflow heat exchanger with up to 93% thermal recovery efficiency, and a plug-and-play design that allows fast installation and simplified maintenance.

The system is available in multiple versions to meet diverse space and project requirements:

Ariosa HV:

Horizontal-vertical unit (H 1200 × W 800 × D 210 mm).
Airflow: 170, 250, 330 m³/h.
Suitable for ceiling voids or wall-mounted applications in apartments, hotels, student housing, villas and small commercial buildings (up to 245 m²).

Ariosa V:

Vertical unit (H 940 × W 750 × D 570 mm).
Airflow: 350, 450, 600 m³/h.
Designed for floor-standing installations in larger residential or commercial areas (up to 450 m²).

Ariosa V Compact:

Compact vertical unit (H 600 × W 540 × D 400 mm).
Airflow: 150, 250 m³/h.
Fits utility cupboards and kitchen units, serving areas up to 185 m².

Control and diagnostics:

Wireless smart control panel with free dedicated mobile app (iOS and Android).
Four temperature sensors per unit (one per ducting) for intelligent seasonal operation.
Four humidity sensors (two for the Lite unit) trigger automatic boost mode when humidity levels rise.
Two differential pressure sensors monitor filter conditions in real-time.
Remote service centre access for live diagnostics and faster technical support.

Certifications:

Passive House (Passivhaus) certified.
SAP Appendix Q listed.
Compliant with ErP 2018, EN 13141, EN 16798 standards.

Valsir Ariosa Dot – Single-Room Dual-Flow MVHR Units

Valsir Ariosa DOT units are compact, single-room MVHR systems offering decentralised ventilation without ducting. They are suitable for retrofitting or for spaces where centralised systems are impractical.

Ariosa DOT:

Vertical unit (H 640 × W 950 × D 190 mm).
Airflow: 100 m³/h, suitable for spaces up to 70 m².
Optional integrated dehumidification system (DOT HP).

Ariosa DOT Mini:

Horizontal or vertical, exposed or recessed version (H 220 × W 450 × D 190 mm).
Airflow: 70 m³/h, suitable for spaces up to 50 m².

Valsir Ariasilent – Air Distribution System

Valsir AriaSilent is a modular, low-noise air distribution system developed for use with Ariosa MVHR units or other ventilation systems. It includes flexible, antibacterial, anti-static ducts and accessories optimized for airflow performance and ease of installation.

System benefits – Ariosa Mvhr + Ariasilent

Enhanced thermal comfort and air quality.
Reduced energy consumption and carbon footprint.
Silent and invisible integration into residential or commercial buildings.
Improved building EPC ratings and compliance with NZEB requirements.