Mechanical Air Filter:
A device that utilizes a filter media, which may or may not have a passive electrostatic charge, to mechanically remove airborne particulate, including particulate from biological sources, in residential and commercial heating, ventilating, air conditioning and refrigeration systems.

Electronic Air Filter:
An electrically powered device that utilizes an active electrical or ionization field to impose a charge on the airborne particulate, including particulate from biological sources, that assists in removing the particulate from the air stream in residential and commercial heating, ventilating, air conditioning and refrigeration systems.

Ultraviolet Light Treatment:
Factory made devices that create light in the Ultraviolet wavelength for use either as a germicidal light to affect microorganisms on illuminated surfaced or in the air stream or to cause a catalytic reaction to break down contaminants in the air circulating in the ductwork of residential and commercial environments.

Air and combustion gas moving devices, consisting of impellers, motors, and associated components, produced for other manufacturers in the air -conditioning, heating, and refrigeration industry.

Gas burners, oil burners, and combination gas/oil burners and components thereof for use in residential, commercial and industrial applications.

Manufacture chemical compounds that have significant application in conjunction with the manufacture, operation, or service of air conditioning and refrigeration equipment, and containers and equipment used to transport, store, or process these chemicals.

Reclaim recovered refrigerants to the purity specifications outlined in the current version of AHRI Standard 700 (Specification for Fluorocarbon Refrigerants). The process can be used to reclaim customer-owned refrigerants or to reclaim used refrigerant that will subsequently be sold to third parties. Specifically excluded are refrigerants synthesized from virgin materials.

Compressors and compressor units designed for use in HVACR equipment and building systems and not included in another AHRI product scope, with the specific exclusion of:

• Compressors and compressor units intended for use in:
  • Household refrigerators
  • Farm and home freezers
  • Automotive air conditioners
  • Room air conditioners
  • Household dehumidifiers

Controllers and auxiliary control devices, which are primarily designed to aid in unattended operation, energy efficiency, electric utility demand reduction, cloud connectivity, fault detection & diagnosis, cyber security or safety in the operation of components of comfort conditioning equipment, commercial and industrial refrigeration equipment covered by other AHRI product scopes. Such devices are to be responsive to, but not limited to, one or more of the following conditions: time, temperature, pressure, humidity, fluid flow, air quality (this includes all air contaminants including leaked refrigerants), current, voltage, or, power, and demand reduction or pricing signals.

Specifically excluded are:

• General purpose motor starters and circuit breakers.
• All low voltage thermostats.
• Component controllers and auxiliary controlling devices used in equipment not covered by AHRI product scopes, for example: automotive and recreational vehicles, domestic refrigerators, freezers, and room air conditioners.
• Gas controls.

Manufacturers of solenoid valves; 2-, 3-, 4-way reversing valves; thermostatic, electronic and automatic expansion valves of all capacities; temperature and pressure regulating valves, which function alone or in combination with other controls or sources, that are designed primarily for the purpose of automatically controlling refrigerant flow (liquids or gases) or the flow of fluids supporting the refrigeration cycle in refrigeration or air conditioning systems.

All manually operated valves used to control the flow of refrigerant or flow of fluids supporting the refrigeration cycle.

Sealed filter-driers having solid core desiccant, loose-fill desiccant, or a combination of the two; replaceable core filter-driers for use in liquid or vapor refrigerant lines; sealed or replaceable element suction filters; cores or elements for shells; receiver driers; strainers; and liquid or moisture-liquid indicators. These products alone or in combination are intended for use primarily in refrigeration or air conditioning systems for the purpose of detecting and/or removing system contaminants.

Excluded are devices used with:

• Automotive and recreational vehicle air conditioning
• Domestic refrigerators/freezers, and Individual room air conditioners not included in other AHRI product scopes
• Hydronic system flow control valves that are included in the scope of the AHRI product scopes

Factory-designed and prefabricated products used as part of a building’s gas distribution system or to connect gas fired appliances and equipment to the building’s distribution system. These products include corrugated stainless steel tubing (CSST) systems listed in compliance with ANSI LC 1, Fuel Gas Piping Systems using Corrugated Stainless Steel Tubing; and gas appliance connectors and quick-disconnect devices. Specifically excluded are products included in the scope of other AHRI product scopes.

Controls, including components, and accessories, for use on gas-fired utilization equipment (including, but not limited to, combination gas controls; manual gas valves; gas appliance pressure regulators; automatic gas valves; automatic gas ignition systems; flame sensors, monitors and programmers; gas filters and sediment traps; thermostatic system components; automatic flue and vent dampers; oxygen depletion sensing (ODS) devices, pressure sensors and switches; and line pressure regulators.

Devices designed to add moisture to the air, including:

1. Central humidifiers designed to add moisture to air circulated through ducts.
2. Central system humidifiers, designed to add moisture directly into a room or duct system but dependent upon associated outside generating source such as:
   • Steam grid duct
   • Steam room humidifiers
   • Pneumatic atomizing
3. Fixed humidifiers, designed to add moisture directly to the space where the humidifier is located, excluding portable.
4. Self-contained humidifiers, designed to add moisture directly into a room or duct system independent of associated outside generating source such as:
   • Electrode steam generators
   • Electric evaporative
   • Centrifugal atomizing

All low voltages, 690 volts ac and below, adjustable frequency motor controllers used in HVACR applications shall be included. Specifically excluded brushless DC motor controllers and external control automation.

Venting systems and related equipment used for the venting of gas and oil burning appliances (includes metallic and plastic gas venting products, and metallic chimney liners).

Zone control systems are defined as in-line duct dampers and controllers for the purpose of multiple zone control with single zone unitary HVAC equipment.