Supporting a Loved One With Allergies at Home

I am new to this community and here to learn.

Someone close to me has been struggling with allergies at home, especially from dust, pollen and pet dander. It is affecting daily comfort, particularly in shared living spaces like the bedroom and living room.

I am trying to support them the best I can and also reduce allergens inside the home to make the environment more comfortable and easier to breathe in.If anyone here has been in a similar situation, I would really appreciate your advice.

What are the most effective ways to reduce dust, pollen, and pet allergens indoors?How can I improve overall indoor air quality at home without making major lifestyle changes?

Thanks in advance for your support and thoughts.