MDS 697.3

Wording: Applied science & technology Buildings Heating, ventilating, air-conditioning engineering Furnaces

0 Computer science, information & general works 252,013 ℹ️	1 Philosophy & psychology 270,129 🧠	2 Religion 681,242 🙏	3 Society, government, & culture 1,328,382 👫	4 Language 209,883 💬	5 Natural sciences & mathematics 431,918 🔬	6 Applied science & technology 940,635 💡	7 Arts & recreation 1,031,850 🎨	8 Literature & rhetoric 1,436,736 📚	9 History & geography 837,760 🗺️
60 Technology 9,943 💡	61 Medicine & health 306,082 💉	62 Engineering 157,979 🔩	63 Agriculture 88,093 🌱	64 Home economics & family management 172,237 🏠	65 Management & public relations 145,064 👔	66 Chemical engineering 19,470 🚀	67 Manufacturing 8,724 📦	68 Manufacture for specific uses 20,805 🔨	69 Buildings 12,238 👷
690 Construction of buildings 4,812 🏗	691 Building materials 1,002 ◻	692 Auxiliary construction practices 888 📋	693 Construction in specific types of materials and for specific purposes 1,446 ├┬┴┬┴	694 Wood construction 1,015 🔨	695 Roof covering 212 ⛺	696 Utilities 998 ♨	697 Heating, ventilating, air-conditioning engineering 1,215 ♨️	698 Detail finishing 544 🖌	699 [Formerly: Carbuilding] 106
697.0 135	697.1 45	697.2 37	697.3 Furnaces 6	697.4 Hot water, high and low pressure 13	697.5 Steam, high and low pressure 19	697.6 Gas. Coal Gas. water gas. natural gas.	697.7 Electric and methods 192	697.8 15	697.9 Ventilation. Air Ducts. Conduits. Fans. 256