This will more or less guarantee that your indoor air conditions will remain perfect.
If you are anything like me and have disappointing pollen irritations issues all year round, you really need to look into having your HVAC ducts cleaned. Bad air quality comes from the HVAC duct and HVAC ducts of your central heating and a/c most of the time. This is the number one leader in disappointing air quality! I l received this quite recently when my house had such disappointing air quality that I ended up having to go to the medical professional for dust sensitivity issues. And it turned out that the solution was not special medicine, however getting both my HVAC ducts and HVAC duct cleaned. Cleaning the HVAC ducts and HVAC duct in your house is the key to keeping your home’s air quality great. The local heating and A/C company occasionally has deals on HVAC duct cleaning. This can be great if you hit it at the right time when they have the specials going on. The other option you could do is get yourself an HVAC repair plan and have your HVAC ducts and HVAC duct cleaned as area of the HVAC repair plan a few times per year. This will more or less guarantee that your indoor air conditions will remain perfect. Also having some kind of whole-house air purifier can help too… No need for a whole house whole-house air purifier if your house isn’t totally mangled from disappointing air quality. But a portable whole-house air purifier can help a whole lot. I obtained myself a portable whole-house air purifier pretty cheap at a local outlet. It has really been helping me!