//! Recuperator models for counterflow heat recovery.
//!
//! Two models are provided, distinguished by what is known:
//!
//! - [`RecuperatorGivenUa`]: given a target thermal conductance (UA),
//! iterates on outlet temperature to find the operating state.
//! - [`RecuperatorGivenOutlet`]: given an outlet temperature, computes
//! the resulting UA directly (no iteration).
pub use ;
pub use ;