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

which can effectively balance humidity and heat recovery to cope with cold and dry environments:

1. Severely cold and dry northern regions (such as Lapland)

Reasons for application: The winter is extremely cold and the air is dry (often below -20℃). ERV can transfer moisture through desiccants to prevent excessive indoor drying 

and recover heat at the same time.

Typical places: Rovaniemi (Santa Claus Village), hotels, residences and aurora observation cabins in the Inari Lake District.

2. Central towns in high-humidity lake areas (such as Kuopio and Tampere)

Reasons for application: The lake area is cold and humid in winter and mild in summer. ERV can regulate humidity (mildew prevention) and temperature at the same time to 

maintain comfort throughout the year.

Typical places: Lakeside holiday homes, sauna-supported residences (to prevent wood from getting damp), and year-round hot spring hotels.

3. Southern coastal cities (such as Helsinki and Espoo) ‌

‌Reasons for application‌: Winter sea breezes intensify the feeling of coldness, and modern buildings are highly airtight. ERV can prevent low humidity and improve energy efficiency.

‌Typical places‌:

‌New apartments and office buildings‌: high-rise residential buildings in the center of Helsinki, Finlandia Hall Conference Center;

‌Historical renovation projects‌: Rock Church Visitor Center, Museum in Suomenlinna Fortress (relics need to be protected by constant humidity).

4. New energy-saving residential areas and ecological communities ‌

‌Reasons for application‌: New residential buildings in Finland must meet strict energy consumption standards (such as passive houses). ERV is a core component that can reduce 

heating load by more than 30%.

‌Case‌: Ecological wooden houses around Nuuksio National Park (need to cope with changes in forest humidity), Viikki Sustainable Community in Helsinki.