--- kind: "section" citation: "24 C.F.R. § 3280.703" title: "24" number: "3280.703" heading: "Minimum standards." url: "https://uscodex.org/cfr/24/3280.703" --- # §3280.703. Minimum standards. Heating, cooling, and fuel burning appliances and systems in manufactured homes shall be free of defects and shall conform to applicable standards (incorporated by reference, see [§ 3280.4](/cfr/24/3280.4.md)) in this section unless otherwise specified in this part. When more than one standard is referenced, compliance with any one such standard shall meet the requirements of this part. - (a) **Appliances.** - (1) **Liquid Fuel-Burning Heating Appliances for Manufactured Homes and Recreational Vehicles—** UL 307A. - (2) **Fixed and Location-Dedicated Electric Room Heaters—** UL 2021. - (3) **Electric Baseboard Heating Equipment—** UL 1042. - (4) **Electric Central Air Heating Equipment—** UL 1096. - (5) **Gas-Burning Heating Appliances for Manufactured Homes and Recreational Vehicles—** UL 307B. - (6) **Gas Clothes Dryers Volume I, Type 1 Clothes Dryers—** ANSI Z21.5.1 (CSA Group). - (7) Gas-fired Water Heaters, Volume III, Storage Water Heaters with Input Ratings Above 75,000 BTU per Hour, Circulating and Instantaneous—ANSI Z21.10.3 (CSA Group). - (8) **Gas-Fired, Heat Activated Air Conditioning and Heat Pump Appliances—** ANSI Z21.40.1 (CSA Group). - (9) **Gas-Fired Central Furnaces (Except Direct Vent Systems)—** ANSI Z21.47(CSA Group). - (10) **Connectors for Outdoor Gas Appliances and Manufactured Homes—** ANSI Z21.75 (CSA Group). - (11) **Decorative Gas Appliances for Installation in Solid Fuel Burning Fireplaces—** RADCO DS-010. - (12) **Household Cooking Gas Appliances—** ANSI Z21.1 (CSA Group). - (13) **Refrigerators Using Gas Fuel—** ANSI Z21.19 (CSA Group). - (14) **Gas Water Heaters, Volume I, Storage Water Heaters with Input Ratings of 75,000 BTU per hour or Less—** ANSI Z21.10.1 (CSA Group). - (15) **Household Electric Storage Tank Water Heaters—** UL 174. - (16) **Household and Similar Electrical Appliances—** [Part 2-40](/cfr/24/part2-40.md): Particular Requirements for Electrical Heat Pumps, Air-Conditioners and Dehumidifiers—UL 60335-2-40. - (17) **Smoke Detectors for Fire Protective Signaling Systems—** UL 268. - (18) **Single and Multiple Station Carbon Monoxide Alarms—** UL 2034. - (19) **Electric Heating Appliances—** UL 499. - (b) **Ferrous pipe and fittings.** - (1) **Standard Specification for Pipe, Steel, Black and Hot-Dipped, Zinc-Coated, Welded and Seamless—** ASTM A53/A53M. - (2) **Standard Specification for Electric-Resistance-Welded Coiled Steel Tubing for Gas and Fuel Oil Lines—** ASTM A539. - (3) **Pipe Threads, General Purpose (Inch)—** ANSI/ASME B1.20.1. - (4) **Welding and Seamless Wrought Steel Pipe—** ANSI/ASME B36.10. - (c) **Nonferrous pipe, tubing, and fittings.** - (1) **Standard Specification for Seamless Copper Water Tube—** ASTM B88. - (2) **Standard Specification for Seamless Copper Tube for Air Conditioning and Refrigeration Field Service—** ASTM B280. - (3) **Connectors for Gas Appliances—** ANSI Z21.24 (CSA Group). - (4) **Manually Operated Gas Valves for Appliances, Appliance Connector Valves and Hose End Valves—** ANSI Z21.15 (CSA Group). - (5) **Standard for Gas Supply Connectors for Manufactured Homes—** IAPMO TS 9. - (6) **Standard Specification for General Requirements for Wrought Seamless Copper and Copper-Alloy Tube—** ASTM B251. - (7) **Standard Specification for Seamless Copper Pipe, Standard Sizes—** ASTM B42. - (d) **Miscellaneous.** - (1) **Factory-Made Air Ducts and Air Connectors—** UL 181. - (2) **Closure Systems for use with Rigid Air Ducts and Air Connectors—** UL 181A. - (3) **Closure Systems for use with Flexible Air Ducts and Air Connectors—** UL 181B. - (4) **Safety Glazing Materials Used in Buildings—** Safety Performance Specifications and Methods of Test—ANSI Z97.1. - (5) **Tube Fittings for Flammable and Combustible Fluids, Refrigeration Service, and Marine Use—** UL 109. - (6) **Pigtails and Flexible Hose Connectors for LP-Gas—** UL 569. - (7) **Roof Jacks for Manufactured Homes and Recreational Vehicles—** UL 311. - (8) **Relief Valves for Hot Water Supply Systems—** ANSI Z21.22. - (9) **Automatic electrical controls for household and similar use—** [Part 2-5](/cfr/24/part2-5.md): Particular requirements for automatic electrical burner control systems—ANSI Z21.20 (CSA Group). - (10) **Automatic Valves for Gas Appliances—** ANSI Z21.21 (CSA Group). - (11) **Gas Appliance Thermostats—** ANSI Z21.23 (CSA Group). - (12) **Gas Vents—** UL 441. - (13) **Installation of Oil-Burning Equipment—** NFPA 31. - (14) **National Fuel Gas Code—** NFPA 54/ANSI Z223.1. - (15) **Warm Air Heating and Air Conditioning Systems—** NFPA 90B. - (16) **Liquefied Petroleum Gases Code—** NFPA 58. - (17) **Flares for Tubing—** SAE J533. - (18) **Factory Built Chimneys for Residential Type and Building Heating Appliances—** UL 103. - (19) **Factory-Built Fireplaces—** UL 127. - (20) **Solid-Fuel Type Room Heaters—** UL 1482. - (21) **Fireplace Stoves—** UL 737. - (22) **Rating of Unitary Air-Conditioning and Air-Source Heat Pump Equipment—** ANSI/AHRI Standard 210/240 with Addenda 1 and 2. - (23) **Ventilation and Acceptable Indoor Air Quality in Low-Rise Residential Buildings—** ANSI/ASHRAE 62.2. - (24) Requirements for Gas Connectors for Connection of Fixed Appliances for Outdoor Installation, Park Trailers, and Manufactured (Mobile) Homes to the Gas Supply—AGA No. 3. ## Notes ### Amendments [58 FR 55015, Oct. 25, 1993, as amended at 70 FR 72046, Nov. 30, 2005; 78 FR 73987, Dec. 9, 2013; 89 FR 75753, Sept. 16, 2024] ### Authority Authority: 15 U.S.C. 2697, 42 U.S.C. 3535(d), 5403, and 5424. ### Source Source: 40 FR 58752, Dec. 18, 1975, unless otherwise noted. Redesignated at 44 FR 20679, Apr. 6, 1979. ### Amendments [58 FR 55015, Oct. 25, 1993, as amended at 70 FR 72046, Nov. 30, 2005; 78 FR 73987, Dec. 9, 2013; 89 FR 75753, Sept. 16, 2024]