Homeowners can install an entire home air purifier system at any time. When a customer installs a new heating and cooling system we do evaluate your goals for your indoor air quality needs. For example, do you have pets, allergies, headaches, moisture in the air, hardwood floors, mold issues and etc. One of the areas to instantly improve air quality is by installing a larger media air filter rack. UV light purifiers are an excellent option as well. A whole house air purifier forces air flow through the system capturing particles like dust, pollen, pet dander, mold spores and other dirty airborne species.