NightBreeze®

For centuries, people have cooled their home by opening windows at night to let in the cool nighttime air, and closing them in the morning to trap the cool air inside.

The principal of ventilation cooling is to circulate cool night air through buildings, thereby cooling (removing heat from) interior mass surfaces such as walls, concrete floors, and furnishings. During the day this cool mass absorbs heat from the air, keeping indoor temperatures more comfortable. Studies have shown that ventilation cooling can eliminate the need for air conditioning in coastal-influenced California climate zones, and can substantially reduce both total and peak demand air conditioning energy use in the inland valleys.

However, opening windows may be objectionable from a security standpoint, is not effective on very still nights, and may introduce dust and pollens to the house. Sound may also be an issue in neighborhoods with excessive traffic noise. Window fans and whole house fans provide increased airflow and improve cooling, but also require windows to be opened.

NightBreeze is a unique integrated night ventilation cooling system with intelligent adaptive controls that optimize security, cooling comfort and energy and demand savings. It also filters the outside air to create a healthier, more comfortable environment. The system is designed to operate in low humidity climates.

The NightBreeze system integrates heating, ventilation cooling, and air conditioning and provides fresh-air ventilation for maintaining indoor air quality. During the summer, if the house is warm and the outside temperature is cool, the NightBreeze system automatically brings outside air into the house through a special damper and ventilation duct. In the winter NightBreeze heats the house using heat from the water heater or from a conventional gas furnace and also periodically introduces outside air into the system air stream to provide adequate ventilation. The NightBreeze thermostat maintains the homeowner’s comfort level by setting minimum and maximum temperatures for the home, maximizing comfort and the use of natural ventilation.

NightBreeze can be used in:

• New construction of single family homes.
• New construction of multi-family homes.
• Retrofit of select single family houses with a large attic and attic-mounted furnace.
• Select commercial spaces.

For more information on NightBreeze please contact Mark Berman, Jerry Best, Davis Energy Group, or view this online training video from the California Energy Commission.

NightBreeze Manuals

NightBreeze Specs