Heat bubble....
Heat rises. If it can't get out it collects and stays in. The more heat source(in this case pigeons) you have the more moisture it can support. By leaving the lower vents open the moisture is decreased. If you leave the upper vents open the temp in the coop goes to the same temp as outside to the level of the vents that are open. The "heat bubble" is the warm air that is trapped up to the level of the lowest opening. Unlike chickens with combs and wattles humidity is less bothersome to pigeons. That said, from my own experience, if I spend a cpl days in the house 'just because I can now' when I go outside in the dead-o-winter I can REALLY feel the humidity difference(between the wood fire heat in the house and outside winter air)on my throat and lungs.
Pigeons are generally pretty tough birds but I still wanna give a bit of comfort/respite, especially from the extremes we get here.
Hoe this helps
Heat rises. If it can't get out it collects and stays in. The more heat source(in this case pigeons) you have the more moisture it can support. By leaving the lower vents open the moisture is decreased. If you leave the upper vents open the temp in the coop goes to the same temp as outside to the level of the vents that are open. The "heat bubble" is the warm air that is trapped up to the level of the lowest opening. Unlike chickens with combs and wattles humidity is less bothersome to pigeons. That said, from my own experience, if I spend a cpl days in the house 'just because I can now' when I go outside in the dead-o-winter I can REALLY feel the humidity difference(between the wood fire heat in the house and outside winter air)on my throat and lungs.
Pigeons are generally pretty tough birds but I still wanna give a bit of comfort/respite, especially from the extremes we get here.
Hoe this helps