UL 867 2024-06 PDF

Full title and description

St UL 867 2024-06 — Standard for Electrostatic Air Cleaners (UL 867). This entry reflects the 5th edition of UL 867 (original edition date: August 4, 2011) with the revision change published 20 June 2024 (06/24). The standard specifies safety, construction and test requirements used to evaluate electrostatic air cleaners, ion generators and related power supplies for portable and fixed (including duct-mounted) applications.

Abstract

UL 867 establishes safety and performance-related test methods and requirements for electrostatic air-cleaning equipment and ion generators. It covers electrical, mechanical and thermal safety tests, construction and marking requirements, and specific test methods relevant to ionization and electrostatic precipitation technologies. The standard has been maintained as the primary UL safety reference for portable and fixed electrostatic air cleaners and is commonly used alongside environmental validation protocols that address ozone and byproduct emissions.

General information

• Status: Current / Active (5th Edition with revision Change 06/24).
• Publication date: Change published 20 June 2024; base 5th Edition originally published 4 August 2011.
• Publisher: Underwriters Laboratories (UL).
• ICS / categories: ICS 13.040 (Air quality / air cleaning equipment); product classification frequently associated with air-purification equipment and electric fans categories.
• Edition / version: 5th Edition (with amendment / revision effective June 20, 2024 — often referenced as "Change 06/24").
• Number of pages: Typically published as a ~106-page document for the full 5th Edition (including published changes).

Scope

UL 867 applies to portable and fixed electrostatic air cleaners and to ion-generating devices intended for indoor use. The scope includes requirements for electrical safety (clearances, dielectric strength, grounding), mechanical integrity, thermal and fire performance, protection against user contact with energized parts, wiring strain relief and moving-wire tests, marking and instructions, and testing provisions to characterize ozone and related byproduct emissions where applicable. The standard also addresses evaluation of related power supplies and permits alternate means of compliance in some areas by reference to other appliance safety standards.

Key topics and requirements

• Electrical safety: dielectric voltage withstand, electrical spacing, grounding and protective circuitry requirements.
• Mechanical and structural tests: strain-relief, enclosure strength, moving parts and parts-breakage assessments.
• Thermal and fire tests: temperature-rise, flammability and exposure tests on insulating materials and components.
• Ozone and byproduct considerations: provisions for measuring ozone emissions and evaluating potential air-chemistry impacts (commonly used with environmental validation programs).
• Marking, instructions and warnings: labeling for safe operation, maintenance, filter care and intended use (portable vs. fixed installations).
• Power-supply and motor protection: requirements and allowed alternate evaluation routes (including references to appliance safety requirements in UL 60335-1 where applicable).
• Product categories and definitions: clarification between portable and fixed electrostatic cleaners, ion generators and compatible accessory equipment.

Typical use and users

Primary users are manufacturers and OEMs of electrostatic air cleaners and ionizers, test laboratories, certification bodies and regulatory compliance teams. Specifiers, procurement professionals, architects, authorities having jurisdiction (AHJs) and product safety engineers also use UL 867 when selecting or approving air-cleaning equipment for residential, commercial and institutional applications.

Related standards

Commonly referenced companion standards and industry documents include UL 2998 (Zero Ozone Emissions validation), UL 507 (Electric Fans / air-filtering appliances), UL 60335-1 (safety of household and similar electrical appliances — referenced for alternate evaluation methods), ANSI/AHAM AC-1 (CADR and air-cleaner test methods), ASHRAE 62.1 (ventilation and air quality provisions), and applicable national standards (for example CSA equivalents for Canada). Regulatory programs and energy/labeling schemes may reference UL 867 test results when setting ozone or performance limits.

Keywords

UL 867, electrostatic air cleaner, ionizer, electrostatic precipitator, ozone emissions, air cleaner safety, portable air cleaner, fixed air cleaner, UL standard, electrical safety, appliance testing.

FAQ

Q: What is this standard?

A: UL 867 is Underwriters Laboratories' Standard for Electrostatic Air Cleaners. It defines safety, construction and testing requirements for electrostatic air-cleaning devices and related ion generators used in indoor environments.

Q: What does it cover?

A: It covers portable and fixed electrostatic air cleaners and ion generators, including electrical, mechanical and thermal safety tests, construction rules, marking and instruction requirements, and test methods relevant to ionization and ozone/byproduct considerations. It also addresses evaluation of associated power supplies and allows certain alternate compliance methods by reference to other appliance safety standards.

Q: Who typically uses it?

A: Manufacturers, product safety and compliance engineers, third‑party test laboratories, certification bodies, regulators, procurement/specification professionals, and AHJs use UL 867 to design, test, certify and approve electrostatic air-cleaning equipment.

Q: Is it current or superseded?

A: The standard is current. The document is the 5th Edition (originally published August 4, 2011) with a published revision/change effective 20 June 2024 (often cited as Change 06/24). Users should confirm they reference the latest published changes and any applicable national/regional requirements when applying the standard.

Q: Is it part of a series?

A: UL 867 is part of the broader family of UL standards addressing appliance and air-cleaning safety. It is commonly used alongside standards such as UL 507 (electric fans/air-filtering appliances), UL 2998 (zero-ozone validation), UL 60335-1 (household appliances safety) and related national/industry test methods (ANSI/AHAM, ASHRAE guidance, CSA equivalents).

Q: What are the key keywords?

A: Electrostatic air cleaner, ionizer, ozone, emissions, UL 867, electrostatic precipitator, portable air cleaner, fixed/duct-mounted cleaner, safety testing, appliance standard.