13 ENVIRONMENT. HEALTH PROTECTION. SAFETY 13.040 Air quality 13.040.01 Air quality in general 13.040.20 Ambient atmospheres 13.040.99 Other standards related to air quality 13.140 Noise with respect to human beings23 FLUID SYSTEMS AND COMPONENTS FOR GENERAL USE 23.120 Ventilators. Fans. Air-conditioners27 ENERGY AND HEAT TRANSFER ENGINEERING 27.010 Energy and heat transfer engineering in general 27.015 Energy efficiency. Energy conservation in general 27.220 Heat recovery. Thermal insulation91 CONSTRUCTION MATERIALS AND BUILDING 91.060 Elements of buildings 91.060.99 Other elements of buildings 91.140 Installations in buildings 91.140.30 Ventilation and air-conditioning systems 91.160 Lighting 91.160.01 Lighting in general 91.160.10 Interior lighting 91.160.20 Exterior building lighting 97 DOMESTIC AND COMMERCIAL EQUIPMENT. ENTERTAINMENT. SPORTS 97.020 Home economics in general 97.040 Kitchen equipment 97.040.20 Cooking ranges, working tables, ovens and similar appliances 97.040.99 Other kitchen equipment 97.100 Domestic, commercial and industrial heating appliances 97.100.99 Heaters using other sources of energy EPA ENERGY STAR® Heating and Cooling Ventilation Fans |