UL 507 PDF

1 Scope

1.1 These requirements cover:

1. a) Fans and blowers that circulate air, such as desk, ceiling-suspended, and hassock fans;

2. b) Fans and blowers that ventilate air, such as attic, whole-house window, through wall, and direct discharge fans;

3. c) Ducted fans and blowers that exhaust air to the outside of a building structure, such as in-line, wall insert and ceiling insert fans;

4. d) Dryer type fans used for drying carpets or floors;

5. e) Commercial display blowers;

6. f) Evaporative coolers;

7. g) Evaporative cooler replacement pumps;

8. h) Air-filtering appliances;

9. i) Component fans;

10. j) Low voltage component fans;

11. k) Residential cooking area fans, such as rangehoods and downdrafts;

12. l) Hand dryers without heater; and

13. m) Recirculating and blending units except as noted in 2(h).

These products are rated 600 volts or less and are intended to be employed in accordance with the National Electrical Code, ANSI/NFPA 70.

1.2 These requirements do not cover:

1. a) Air heaters incorporating fans, heating-ventilating units, or blowers comprising components of such equipment as furnaces, mechanical-refrigeration equipment, or air conditioners;

2. b) Fusible links, and the like, provided to disconnect a fan or close shutters in the event of fire;

3. c) Fans for use in cooking areas when the fan is intended for other than household use;

4. d) Fans intended to be used in hazardous locations as defined in the National Electrical Code, ANSI/NFPA 70;

5. e) Fans intended to be installed over solvents or chemically flammable liquids or vapors;

6. f) Fans located in chemically corrosive environments;

7. g) Humidifiers;

8. h) Fans intended to move heated or conditioned air;

9. i) Heated hand dryers;

10. j) Ionizers, products with ionization features, or electrostatic air cleaners;

11. k) Household or commercial blowers or inflators intended for use with inflatable bouncing toys or similar children's products.

12. l) Microwaves, ventilating or otherwise;

13. m) Ducted or non-ducted heat recovery ventilators;

14. n) Deodorizers and air fresheners.

Summary of Topics

The revisions for ANSI/UL 507 dated August 22, 2024 include the following changes in requirements:

– UL 507 Standard Changes for Electric Fans – Unattended Fans in Cleanrooms: 2.2.8A and 178.1;

– Clarification of Requirements for Unattended Area Fans Provided with Low Voltage Component Fans: 178.1;

– Clarification of 179A.1.4 for Fan Motors Provided with Primary Protection Devices Other Than Thermal Cutoff;

– DIY Air Cleaning Portable Air-Circulating Fans: 84.6;

– Clarification to Paragraph 16.3, Loading Conditions;

– Addition of UL 2595 as an Alternative to UL 2054 for Battery Operation: 215.1, Sections 226 and 227, and Table 227.1;

– Addition of Requirements for Class 2 Low Voltage Ceiling Insert Fan: 2.2.8B and Sections 228, 229, 230, and 231;

– Editorial Revisions of Paragraphs 126.1 and 166.1.2;

– Clarification of Sample Requirements for Impedance Protected Motors Provided with a Secondary Protection: 179A.1.1, 179A.1.3, 179A.1.6, and 179A.2.1;

– Revisions Based on Latest Version of UL 4200A: Section 38 and 38.1; and

– Addition of Requirements for Automatic Starting Device for Rangehoods: 113.14