One unit in each main room, fitted in about two hours.
Cooking, showers and drying clothes fill the air with moisture.
The air isn't changed, so it feels heavy and condensation appears.
A central system needs ducts and suspended ceilings. PRANA needs one hole per unit.

Recommendation
The PRANA 150 Premium has a humidity sensor and the AUTO and AUTO PLUS modes. Usually one unit goes in each main room.
≈ 2 h
installation per unit
Indicative advice. The exact number of units follows a site visit.
The ventilation adjusts itself to humidity, CO₂ and air quality (VOC), depending on the configuration. Mini-heating and Winter mode switch on and off by themselves.
InPremiumPremium Plus
Protects the heat exchanger from freezing in the cold season and raises the incoming air by 3–4 °C in night mode.
InStandardPremiumPremium Plus
Defrosts and warms the system after a stop and before the cold season, so frozen moisture can't damage the fans. Use it together with Mini-heating when it's below +4 °C outside.
InStandardPremiumPremium Plus
We'll propose the model and number of units, free of charge.