Global Boiler Market Size, Share Analysis Report By Fuel (Natural gas, Oil, Coal, Electric, Others), By Capacity (≤10 MMBTU/hr, 10-50 MMBTU/hr, >50-100 MMBTU/hr, >100-250 MMBTU/hr, 250 MMBTU/hr), By Technology (Condensing, Non-condensing), By Application (Residential, Commercial, Industrial, Others), By Sales Channel (Online, Dealer, Retail) , By Region and Companies - Industry Segment Outlook, Market Assessment, Competition Scenario, Trends and Forecast 2026-2035