Hello, I’m interested in learning more about how often we should change or clean air filters in homes and small shops to keep the air quality healthy. I’ve noticed that when filters are dirty, people seem to get headaches or allergies more easily, and I want to make sure I’m doing things correctly.

Could you please explain:

How often you recommend changing filters in a normal home

How to know when a filter is no longer effective

If there are different types of filters for people with allergies or sensitive lungs

I'm trying to live a bit more sustainably in general – for example, I’ve been moving toward vintage clothing and more mindful shopping – and I’d also like to make better choices about air filters that balance health, cost, and the environment. Thank you for any advice and product recommendations you can share.