What CADR rating do I need for pet allergies?

Match your CADR (Clean Air Delivery Rate) to your room size. A good rule of thumb is CADR should be at least two thirds of your room area in square feet. For a 200 sq ft bedroom, aim for a CADR of at least 130. For a 400 sq ft living room with multiple pets, look for 250+ CADR to cycle the air fast enough to keep dander levels low.