Air is Life

Heat Recovery Ventilation for Individual Spaces

Mould and excess moisture are common problems in spaces where a centralised heat recovery ventilation system simply isn't an option. The Ariosa DOT solves this with a plug & play design — no ductwork or air distribution network required, just three holes and a power connection. It suits a wide range of settings, from residential rooms and small offices to professional studios and medical clinics.

By continuously exchanging stale air for fresh, filtered air, the unit keeps heat loss to a minimum while maintaining a healthy, comfortable atmosphere throughout the year. In rooms prone to damp, pairing the Ariosa DOT with a dehumidifier adds an extra layer of moisture control, and combining it with an air purifier further improves overall air quality — giving you a more complete indoor air solution.

Valsir Ariosa DOT — front detailValsir Ariosa DOT — front viewValsir Ariosa DOT — top fin detailValsir Ariosa DOT installed in a bright family living roomValsir Ariosa DOT in a modern kitchen dining spaceValsir Ariosa DOT installed in an office meeting room
Individual Room HRV

Valsir Ariosa DOT HRV Unit

A controlled mechanical ventilation system with heat recovery, engineered for residential homes, offices and boardrooms, schools, professional studios, hospitals, and medical clinics. The Ariosa DOT delivers constant, balanced air exchange through high-performance filtration and ultra-efficient heat recovery - creating a comfortable, hygienic indoor environment. For even greater control over air quality, it pairs seamlessly with air purifiers and dehumidifiers, offering a complete approach to healthier indoor air.

£1,198.80
Includes VAT and delivery.
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Key benefits

  • Continuous fresh, filtered air
  • Ceramic core recovers heat energy
  • Reduces condensation and mould risk - complements a dehumidifier for full moisture control
  • Quiet operation for bedrooms and living spaces
  • Wi-Fi and app controlled
  • Low-energy motor for everyday running

Technical specification

TypeSingle-room heat recovery ventilation (HRV)
Heat exchangerStatic air-to-air counterflow heat exchanger
Max air flow rate100 m³/h
Nominal air flow rate70 m³/h
Dry thermal efficiencyUp to 88%
FiltrationISO Coarse >65% (ex G4) extract; ISO ePM1 >50% (ex F7) supply
Sound power level55 dB(A)
Power supply220 V / 1 ph / 50-60 Hz
Max absorbed power41.3 W
Operating range-5°C to +45°C