Outside air isn’t a panacea. There is often plenty of pollution right outside your window unless you live on an idyllic beachfront property. The humidity level outside is also rarely what you want in your home, whether it is too high or too low.
Much better than cracking a window is the use of ERVs (energy recovery ventilators) and air filters on the incoming air.
An ERV is a fairly simple device that exchanges air with the outside while mitigating the loss of energy and humidity.
Any modern home build likely has an ERV as part of the design, but it’s not like they can’t be retrofitted, and I’ve even seen some DIY-friendly window unit ERVs (but I’ve never heard if those are any good).
Much better than cracking a window is the use of ERVs (energy recovery ventilators) and air filters on the incoming air.
An ERV is a fairly simple device that exchanges air with the outside while mitigating the loss of energy and humidity.
Any modern home build likely has an ERV as part of the design, but it’s not like they can’t be retrofitted, and I’ve even seen some DIY-friendly window unit ERVs (but I’ve never heard if those are any good).