This maintains the heat transfer between steam and liquid to a maximum. Figure 3 shows a temperature profile when saturated steam is used. The difference with the previous diagram is that there is now a layer of condensate on the heating surface and steam temperature is constant.
As a general rule Owls are monogamous - pairs are comprised of one male and one female, neither one of which has any involvement with other nesting birds. With some Owl species the pair bonds last only for the duration of the breeding season, especially if the species involved is dispersive or migratory.
Most barn owls first breed when they are 1 year old. Most barn owls raise one brood per year, but some pairs have raised up to three broods in one year. Barn owl pairs often use an old nest instead of building a new one. The female lines the nest with shredded pellets to make a soft surface for the eggs.