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) 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.

1. (a) Appliances.

   1. (1) Liquid Fuel-Burning Heating Appliances for Manufactured Homes and Recreational Vehicles—UL 307A.
   2. (2) Fixed and Location-Dedicated Electric Room Heaters—UL 2021.
   3. (3) Electric Baseboard Heating Equipment—UL 1042.
   4. (4) Electric Central Air Heating Equipment—UL 1096.
   5. (5) Gas-Burning Heating Appliances for Manufactured Homes and Recreational Vehicles—UL 307B.
   6. (6) Gas Clothes Dryers Volume I, Type 1 Clothes Dryers—ANSI Z21.5.1 (CSA Group).
   7. (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. (8) Gas-Fired, Heat Activated Air Conditioning and Heat Pump Appliances—ANSI Z21.40.1 (CSA Group).
   9. (9) Gas-Fired Central Furnaces (Except Direct Vent Systems)—ANSI Z21.47(CSA Group).
   10. (10) Connectors for Outdoor Gas Appliances and Manufactured Homes—ANSI Z21.75 (CSA Group).
   11. (11) Decorative Gas Appliances for Installation in Solid Fuel Burning Fireplaces—RADCO DS-010.
   12. (12) Household Cooking Gas Appliances—ANSI Z21.1 (CSA Group).
   13. (13) Refrigerators Using Gas Fuel—ANSI Z21.19 (CSA Group).
   14. (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. (15) Household Electric Storage Tank Water Heaters—UL 174.
   16. (16) Household and Similar Electrical Appliances—Part 2-40: Particular Requirements for Electrical Heat Pumps, Air-Conditioners and Dehumidifiers—UL 60335-2-40.
   17. (17) Smoke Detectors for Fire Protective Signaling Systems—UL 268.
   18. (18) Single and Multiple Station Carbon Monoxide Alarms—UL 2034.
   19. (19) Electric Heating Appliances—UL 499.

2. (b) Ferrous pipe and fittings.

   1. (1) Standard Specification for Pipe, Steel, Black and Hot-Dipped, Zinc-Coated, Welded and Seamless—ASTM A53/A53M.
   2. (2) Standard Specification for Electric-Resistance-Welded Coiled Steel Tubing for Gas and Fuel Oil Lines—ASTM A539.
   3. (3) Pipe Threads, General Purpose (Inch)—ANSI/ASME B1.20.1.
   4. (4) Welding and Seamless Wrought Steel Pipe—ANSI/ASME B36.10.

3. (c) Nonferrous pipe, tubing, and fittings.

   1. (1) Standard Specification for Seamless Copper Water Tube—ASTM B88.
   2. (2) Standard Specification for Seamless Copper Tube for Air Conditioning and Refrigeration Field Service—ASTM B280.
   3. (3) Connectors for Gas Appliances—ANSI Z21.24 (CSA Group).
   4. (4) Manually Operated Gas Valves for Appliances, Appliance Connector Valves and Hose End Valves—ANSI Z21.15 (CSA Group).
   5. (5) Standard for Gas Supply Connectors for Manufactured Homes—IAPMO TS 9.
   6. (6) Standard Specification for General Requirements for Wrought Seamless Copper and Copper-Alloy Tube—ASTM B251.
   7. (7) Standard Specification for Seamless Copper Pipe, Standard Sizes—ASTM B42.

4. (d) Miscellaneous.

   1. (1) Factory-Made Air Ducts and Air Connectors—UL 181.
   2. (2) Closure Systems for use with Rigid Air Ducts and Air Connectors—UL 181A.
   3. (3) Closure Systems for use with Flexible Air Ducts and Air Connectors—UL 181B.
   4. (4) Safety Glazing Materials Used in Buildings—Safety Performance Specifications and Methods of Test—ANSI Z97.1.
   5. (5) Tube Fittings for Flammable and Combustible Fluids, Refrigeration Service, and Marine Use—UL 109.
   6. (6) Pigtails and Flexible Hose Connectors for LP-Gas—UL 569.
   7. (7) Roof Jacks for Manufactured Homes and Recreational Vehicles—UL 311.
   8. (8) Relief Valves for Hot Water Supply Systems—ANSI Z21.22.
   9. (9) Automatic electrical controls for household and similar use—Part 2-5: Particular requirements for automatic electrical burner control systems—ANSI Z21.20 (CSA Group).
   10. (10) Automatic Valves for Gas Appliances—ANSI Z21.21 (CSA Group).
   11. (11) Gas Appliance Thermostats—ANSI Z21.23 (CSA Group).
   12. (12) Gas Vents—UL 441.
   13. (13) Installation of Oil-Burning Equipment—NFPA 31.
   14. (14) National Fuel Gas Code—NFPA 54/ANSI Z223.1.
   15. (15) Warm Air Heating and Air Conditioning Systems—NFPA 90B.
   16. (16) Liquefied Petroleum Gases Code—NFPA 58.
   17. (17) Flares for Tubing—SAE J533.
   18. (18) Factory Built Chimneys for Residential Type and Building Heating Appliances—UL 103.
   19. (19) Factory-Built Fireplaces—UL 127.
   20. (20) Solid-Fuel Type Room Heaters—UL 1482.
   21. (21) Fireplace Stoves—UL 737.
   22. (22) Rating of Unitary Air-Conditioning and Air-Source Heat Pump Equipment—ANSI/AHRI Standard 210/240 with Addenda 1 and 2.
   23. (23) Ventilation and Acceptable Indoor Air Quality in Low-Rise Residential Buildings—ANSI/ASHRAE 62.2.
   24. (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.

[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]