Seems like a recipe for a damp mouldy property.Personally I just open my windows.
In the summer I always have a few windows left open even if only on the night vent.
In winter just occasionally, While and after showering, Cooking etc. I also always have my bedroom window a little as I like the fresh air.
If you live near a road trickle vents are going to let quite a bit of noise in.
The built-in insect screens are rubbish, They are always full of insects.
As virtually no company fits trickle vent sleeves cold air will get to the inside chambers of the windows making the whole thing colder.
They can whistle in the wind sometimes.
Just open your windows a little occasionally at least you can close and fully seal them when its very windy/noisy or super cold. A 2mm flap of plastic on a trickle vent wont block these things.
The only time I recommend trickle vents (other than when you have to have them) is for rented properties when I work for landlords but even then most of the time you find the tenants just block them up with tissue or something.
I fully understand the need for ventilation. We make our houses air tight now and you need to get the moisture/stale air out and fresh air in.
Ideally every house would have a heat recovery ventilation system but its not in everyone's budget.
Trickle vents are just a bad bodge fix of the problem I feel. If your car had been flooded and was full of water would your first idea be to shoot some holes in the bottom? (got to love Top Gear lol) It would work but there are much better ways to go about it.