Noninvasive Positive Pressure Ventilation;

In this trial investigators will explore if a protocolized rotational use of interfaces i.e., masks, during noninvasive positive pressure ventilation (NPPV) compared to standard care is clinically effective and cost-effective in reducing the incidence of pressure sores in patients with hypercapnic acute respiratory failure (AHRF) treated continuously i.e., for more than 24 hours, with NPPV (to avoid intubation, as alternative to invasive ventilation and after early extubation and weaning).