Classic Edge 760 Titanium HDX outdoor wood furnace. 25.1.1. Overall Efficiency (LHV) - 89.8% 25.1.2. Overall Efficiency (HHV) - 83.4% 25.1.3. Manufacturer's Rated Heat Output Capacity - 245,000 Btu/hr 25.1.4. Heat Output (12 hr) - 146,686 Btu/hr 25.1.5. Firebox Volume - 23 cu ft 25.1.6. Firebox Dimensions - 37" L x 44" H x 26" W 25.1.7. Door - 21" W x 25" H 25.1.8. Ash Cleanout Door - 19" W x 11" H 25.1.9. Water Capacity - 330 gal. 25.1.10. Weight - 2,036 lbs 25.1.11. Supply/Return Ports - 1 set of 1-1/4" supply and return ports, 2 sets of 3/4" supply and return ports 25.1.12. Integrated Wi-Fi Connectivity - Standard 25.1.13. Bypass Door and Alarm - Standard 25.1.14. Included with outdoor furnace - Water Test Kit, Cleaning Rod, Scraper Tool, Ground Rod Kit and two 4-foot chimney sections