^^^ THIS is exactly what @aart and myself and many others are talking about when discussing under eave ventilation. High up, weather sheltered, well above the birds' roosts so no drafts on them. When combined with a ridge vent or monitor-style roof it encourages passive airflow from cold (lower) to hot (upper) even in still air, drawing ammonia vapors out and reducing heat radiated from the underside of the roof surface, whether metal or shingled decking.It's too cold to go out there, so here's a pic from when it was new. I cut out the parts circled with a sawzall & covered them with HC. I did every one of the eaves, front & back. Super simple but adds lots of good ventilation.View attachment 2596018
ETA: Ok, I took a pic.
View attachment 2596502
Great photo. Nice clean work.