Based on Sweden's climate characteristics and building needs, the following areas and scenarios are particularly suitable for installing ERV (Energy Recovery Ventilation) systems, 

mainly due to their excellent humidity and heat exchange capabilities:

1. High humidity coastal areas ‌ ‌West coast (such as Gothenburg) ‌: Affected by the Atlantic warm current, the humidity is high throughout the year. ERV can effectively balance the 

indoor humidity and avoid mold problems caused by humidity (especially in basements).

‌Southern coastal cities (such as Malmö) ‌: Cold and wet in winter and humid in summer. ERV recovers energy while ventilating, reducing dehumidification/humidification energy consumption.

2. Cold inland and northern areas ‌ ‌Northern heating area (such as Kiruna) ‌: Severe cold and dry winters. ERV retains indoor humidity when introducing fresh air to prevent excessive 

air drying and reduce heating heat loss.

‌Lake areas (such as Dalarna Province) ‌: Water bodies intensify humidity fluctuations. ERV can stabilize the indoor humidity environment.

3. Specific building spaces ‌

‌Basements and semi-underground spaces‌: naturally humid and poorly ventilated, ERV has significant anti-mildew and moisture-proof effects (such as villa basements and wine cellars).

‌Modern high-airtightness residential buildings‌: energy-saving buildings rely on mechanical ventilation, and ERV efficiently recycles energy, meeting Swedish low-carbon building standards.

‌Places with high air quality requirements‌:

Hospitals, kindergartens: ERV filters pollutants and keeps humidity stable.

Kitchen/bathroom: quickly discharge high-humidity exhaust gas to avoid condensation.

4. Installation precautions ‌ ‌Avoid pollution sources‌: The air inlet needs to be away from street exhaust and boiler exhaust to prevent pollutant circulation.

‌Building airtightness‌: Old houses need to improve their sealing first, otherwise the ERV effect will be discounted.

Summary and recommendations ‌

The entire country of Sweden can benefit from the ERV system, and the following scenarios are particularly recommended:

‌First choice‌: coastal/lake cities (Gothenburg, Stockholm), modern energy-saving houses, basements; ‌Second choice‌: northern heating areas, high-airtightness public buildings; ‌Use with caution‌: 

The air inlet location must be strictly designed around industrial areas.

The core of ERV's applicability in Sweden lies in its ability to cope with high humidity and extreme temperature differences, taking into account both energy saving and health needs.