How often should I change my air filter during spring?

Change it monthly during spring, especially March through May. High pollen season clogs filters faster, so cut your usual interval in half. If you have allergies, stick to every 30 days. If not, check at 30 days and you can push to 60 if it’s still clean. Use a MERV 8 or higher disposable filter—washable ones aren’t as effective for fine pollen.