I feel the need to clarify or correct some points about recirculation and aircon!
Recirc does allow some fresh air to enter the cabin from outside.
All fresh (and I believe) recirculated air goes through the pollen filter.
The pollen filter will not necessarily remove all smells, but will remove harmful particles and pollen.
The size of particulates removed depends on the "grade" of the filter. Check if buying a filter what grade it is. Cheap might mean it doesn't filter fine particles. I assume the Honda one is OK.
If your screen mists up when using recirc it probably means you should switch on your aircon, or the aircon isn't working properly.
Aircon, either in auto mode or manual, should be used all the time - unless your windows are open. It doesn't just chill the air, it also removes moisture. If used all the time it will prevent your car smelling musty.
I have found in our Jazz mk4 that when the aircon is in auto and set at, say 19 or 20c (when it's hotter outside), the fan is going mad trying to maintain that temp, but if I switch to manual aircon Lo temp I can maintain a cool temp with a lower fan speed, ie it's quieter.
When you have your car serviced, ask if they checked the min temp of the aircon and what it was. They don't give you a written report like they used to! Ours was not blowing as cold as it should even though recently serviced, and when I insisted they check it, it was out of spec. They regassed it under warranty.
