A whole house fan can be good for the environment because it uses significantly less energy than traditional air conditioning systems. Because it is powered by electricity, the environmental impact will depend on the source of the electricity.
If the electricity is generated from renewable sources, such as solar or wind power, then the environmental impact of a whole house fan would be minimal.
Additionally, because whole house fans do not use refrigerants like traditional air conditioners, they do not contribute to ozone depletion or global warming.
Furthermore, by circulating fresh outdoor air throughout the home, whole house fans can improve indoor air quality and reduce the need for chemical air fresheners and other products that can have negative environmental impacts.
Overall, when compared to traditional air conditioning, a whole house fan can be a more environmentally friendly option for cooling your home, especially if it is powered by clean energy.