Lexington, Massachusetts, an affluent community with 85% highly educated residents, presents the following suitable scenarios for ERV (Energy Recovery Ventilation) systems 

based on its building types and climate conditions:

I. Residential Applications

* High-end detached houses: Enclosed building structures are common. ERVs can efficiently recover heat and regulate humidity, resolving the conflict between ventilation and energy consumption in winter.

* Passive house projects: Meeting stringent airtightness standards, requiring continuous air exchange (fresh air volume ≥ 30 m³/h) and minimizing heat loss through ERVs.

II. Commercial and Public Buildings

* Medical/Educational institutions: High requirements for indoor air quality. ERVs can filter particulate matter and maintain CO₂ concentrations below 1000 ppm.

* Laboratories: Requires a stable temperature and humidity environment. The humidity regulation function of ERVs (compared to HRVs) is more suitable for precise experimental needs.

III. Climate Adaptability

* Cold winters: The heat recovery efficiency of ERVs (over 70%) significantly reduces heating load.

Summer Heat and Humidity: Reduced dehumidification energy consumption through humidity exchange meets the energy-saving requirements of the "Design Code for Heating, 

Ventilation and Air Conditioning of Industrial Buildings".

IV. Policy Support: Massachusetts offers subsidies for energy-efficient buildings; installing an ERV system can qualify for a government subsidy of up to $1600.