Air Heating Appliance Market Size and Forecasts (2021 - 2031), Global and Regional Share, Trends, and Growth Opportunity Analysis Report Coverage: By Type (Space Heating Appliance, Water Heating Appliance); Fuel Type (Gas Powered Heating Appliance, Oil Powered Heating Appliance, Electricity Powered Heating Appliance, Solar Energy Powered Heating Appliance); End User (Residential, Commercial, Industrial) , and Geography (North America, Europe, Asia Pacific, and South and Central America)