Respiratory High-Dependency Care Units (RHDCU) provide a specialised environment for patients who require an 鈥渋ntermediate鈥?level of care between the ICU and the ward, where non-invasive monitoring and assisted ventilation techniques are preferentially applied. Since they are dedicated to the management of 鈥渕ono-organ鈥?decompensations, treatment of ARF patients in RHDCU avoids the dangerous 鈥渦nder-assistance鈥?in the ward and unnecessary 鈥渙ver-assistance鈥?in ICU. RHDCUs provide a specialised quality of care for ARF with health resources optimisation and their spread throughout health systems has been driven by their high-level of expertise in non-invasive ventilation (NIV), weaning from invasive ventilation, tracheostomy care, and discharging planning for ventilator-dependent patients.