Household Ventilator Market Size and Forecasts (2021 - 2031), Global and Regional Share, Trends, and Growth Opportunity Analysis Report Coverage: By Type (Pneumatic Ventilators, Electronic Ventilators); Age Group (Adult, Pediatric); Mode (Combined mode Ventilation, Volume mode ventilation, Pressure mode ventilation, Others), and Geography (North America, Europe, Asia Pacific, and South and Central America)