ERV (Energy Recovery Ventilation) systems are suitable for various climates. Montana has a 

continental climate with cold winters, warm summers, and high humidity, making it suitable 

for ERV systems throughout the state. Here are some specific areas:

- **Western Continental Mountain Line Region:** This region has a relatively mild climate 

with high rainfall. The average January temperature is 7°C, and the average July 

temperature is 18°C. In cities like Missoula and Kalispel, ERV systems can recover energy 

while ventilating, reducing heat and moisture loss and maintaining a comfortable indoor 

temperature and humidity environment.

- **Eastern Plains Region:** This region experiences sometimes heavy snow and strong 

winds from Canada in winter, resulting in a drier and colder climate, while summers are 

hotter. In cities like Billings, ERV systems effectively improve indoor air quality, preventing 

poor indoor air circulation caused by severe outdoor weather, and reducing the load on 

heating and cooling systems through energy recovery.

- **Mountainous Areas:** Montana has many mountainous areas, such as the western third 

where the Rocky Mountains run through. These areas experience heavy snowfall and 

significant temperature variations. In cities like Helena and Bozeman, ERV ventilation 

systems can keep indoor air fresh during the cold winter months, preventing moisture 

buildup and air quality degradation caused by closed doors and windows, while also 

regulating indoor temperature and humidity during the summer.