A whole house fan is a ventilation system installed in the ceiling between the living space and the attic. It works by drawing cool outside air in through open windows and doors and pushing the hot air out through the attic vents. Whole house fans are most effective during the cooler morning and evening hours in Fresno, typically before 10am and after 7pm, when outside temperatures drop below the indoor temperature. Running a whole house fan during these windows can pre-cool the home before the day heats up, reducing how hard the air conditioner has to work and lowering energy costs. JC Melton installs whole house fans including Quiet Cool models, which are significantly quieter and more energy-efficient than older designs. Installation costs typically range from $2,500 to $3,000 depending on equipment, and most installations are completed in approximately one full day (8 hours).