UL 1995 2022-08 PDF

Full title and description

St UL 1995 — Standard for Heating and Cooling Equipment (UL 1995), Fifth Edition with revision dated August 1, 2022. This document contains safety requirements, construction and performance criteria, and test methods for stationary heating and cooling equipment used in nonhazardous locations, including heat pumps, air conditioners, liquid chillers and associated assemblies.

Abstract

UL 1995 establishes safety requirements for electrically operated heating and cooling equipment intended for commercial and industrial use. The August 1, 2022 revision updates administrative material (removal of ANSI logo/ANSI references) and publishes change pages; no substantive technical changes were introduced in that administrative revision. The standard has been harmonized with related North American standards and carries change histories tied to the Fifth Edition (originally dated 2015).

General information

• Status: Current (revised — change pages dated August 1, 2022); subject to transition for new certifications to UL 60335-2-40 for certain equipment categories.
• Publication date: Revision pages dated August 1, 2022 (Fifth Edition originally published July 31, 2015).
• Publisher: Underwriters Laboratories (UL).
• ICS / categories: Energy and heat transfer engineering — HVAC, heat pumps and refrigerating technology (ICS 27 family: e.g., 27.080, 27.200).
• Edition / version: 5th Edition (2015) with Revision Change D (08/01/2022).
• Number of pages: Approximately 190–200 pages in the published PDF (catalog records commonly list ~195 pages).

Scope

Applies to stationary heating and cooling equipment for nonhazardous locations, including central heat pumps and air conditioners, liquid chillers, add-on heat pumps, heat pump water heaters and remote control assemblies for such equipment. Note: scope revisions in recent updates clarify the coverage of high-voltage equipment (>600 V up to 7200 V) and, conversely, the movement of certain lower-voltage equipment into UL/CSA 60335-series standards for household/commercial appliances.

Key topics and requirements

• Requirements for construction and materials (mechanical integrity, enclosures, electrical clearances).
• Electrical safety tests: dielectric strength, grounding, short-circuit and overload protection.
• Temperature and overheating protection, thermal cutouts and control reliability.
• Refrigeration-system safety (where applicable), controls and safeguards for compressors and refrigerant-containing parts.
• Marking, instruction and installation requirements, plus performance and endurance tests.

Typical use and users

Used by OEM product design and compliance teams, testing laboratories, certification bodies, code authorities, HVAC and refrigeration engineers, and procurement specialists to design, test and certify heating/cooling equipment for commercial and industrial applications. It is referenced during product listing and factory inspections.

Related standards

Closely related and cross-referenced standards include CSA C22.2 No. 236 (where harmonized), and the UL/CSA 60335 family (for household and certain commercial appliances). As industry refrigerant and equipment coverage has evolved, many certifications and new-product evaluations are moving to UL 60335-2-40 and UL 60335-2-89 for specific appliance categories. Users should check effective dates and certification requirements for their product category.

Keywords

UL 1995, heating and cooling equipment, HVAC, heat pump, air conditioner, liquid chiller, electrical safety, product certification, UL standard, CSA C22.2 No. 236, UL 60335-2-40.

FAQ

Q: What is this standard?

A: UL 1995 is the Underwriters Laboratories standard titled "Heating and Cooling Equipment" that sets safety, construction and testing requirements for stationary HVAC and refrigeration equipment used in nonhazardous locations.

Q: What does it cover?

A: It covers heat pumps, air conditioners, liquid chillers, add-on heat pumps, related assemblies and associated controls and components — detailing required tests, protective features, markings and instructions. Recent revisions clarified administrative material and scope boundaries with respect to voltage and appliance-class equipment.

Q: Who typically uses it?

A: Manufacturers, compliance engineers, testing labs, certification bodies, code authorities and HVAC/R design professionals use UL 1995 to design, test and certify equipment for listing and safe installation.

Q: Is it current or superseded?

A: The document was revised with change pages dated August 1, 2022 and remains the active UL 1995 edition; however, UL has indicated transitions for certain equipment classes (particularly lower-voltage and household-type appliances) to UL/CSA 60335-series standards and UL Solutions has announced that UL 1995 will not be used for new certifications for some products after specified transition dates (check UL/agency notices for exact implementation timelines).

Q: Is it part of a series?

A: Yes — UL 1995 is part of UL's family of product safety standards for HVAC/R and is frequently cross-referenced with CSA C22.2 No. 236 (harmonized text) and with various parts of the UL/CSA 60335 series for household and commercial appliances.

Q: What are the key keywords?

A: Heating and cooling equipment, HVAC, heat pump, air conditioner, liquid chiller, electrical safety, product listing, UL 1995, CSA C22.2 No. 236, UL 60335-2-40.