The effective operation of a whole house fan during the summer months involves leveraging cooler outside air to displace warmer indoor air. This typically entails opening windows on the lower levels of a dwelling to draw air in, while the fan, usually located in the attic, exhausts air upwards. Correct usage depends on exterior temperature conditions being lower than interior temperatures.
Strategically employing this ventilation method can yield significant benefits, including reduced reliance on air conditioning, lower energy consumption, and improved indoor air quality. Historically, similar ventilation strategies were employed long before the advent of modern air conditioning systems, highlighting the long-standing recognition of natural ventilation as a means of maintaining comfortable indoor temperatures.