Applied Industry Sector

Central system finned cooling and heating coils, air conditioning type, not a part of a matched split system as covered by the unitary small equipment scope, and intended for field installation, and for central station air conditioning units used with but not including means for air circulation.

• Standard steam.
• Steam distributing tube type.
• Hot water heating.
• Standard water cooling and/or heating.
• Cleanable tube water.
• Volatile refrigerant cooling.
• Liquids as specified.

Wetted surface dehumidifiers, consisting of a suitable enclosure containing cooling coils, means for liquid spray over the cooling coils, and tank, but without means for air circulation provided as an integral part of the unit. The unit may include a recirculating water pump, eliminator plates, and inlet deflectors.

A factory-made and prefabricated assembly (not necessarily shipped as one package) of one (1) or more compressors, condensers, and evaporators, with interconnections and accessories including controls, designed for the purpose of cooling water. It is a machine specifically designed to make use of a vapor compression refrigeration cycle to transfer heat from a cold water fluid circulating system to the air. This product type includes heat pump and heat recovery water heating packages, condenserless and evaporatively cooled chillers, as well as units that use fluids other than fresh water.

Energy recovery components or air-to-air heat exchangers used to recover energy from exhaust air for the purpose of pre-conditioning outdoor air, prior to supplying the conditioned air to the space, either directly or as part of an airconditioning system (to include air heating, air cooling, air circulating, air cleaning, humidifying and dehumidifying). Heat Exchangers joined by a circulated heat transfer medium (run-around loop) are excluded from this product type. A run-around loop employs liquid-containing coils placed in each of two or more airstreams, wherein the coils are connected to a closed loop.

Energy recovery packaged ventilation units that employ air-to-air energy recovery ventilation components to recover energy from exhaust air for the purpose of pre-conditioning outdoor air, prior to supplying the conditioned air to the space, either directly or as part of an air conditioning (to include air heating, air cooling, air circulating, air cleaning, humidifying and dehumidifying) system.

Factory-made encased assemblies consisting of a fan or fans in parallel which may also include other necessary equipment to perform one or more of the functions of circulating, cleaning, heating, cooling, humidifying, dehumidifying, and mixing of air and that have a maximum design external static pressure greater than 1.0 in H2O. It does not include units that have a source of mechanical cooling or that have direct expansion coils which are incorporated by the manufacturer in a matched split system air conditioner or as otherwise defined in another AHRI product scope .

A datacom cooling product is designed for the primary purpose of providing year-round cooling for facilities which are predominantly populated with servers, computers, networking equipment, electronic equipment, storage products and peripherals which may be mission critical.

Can be one of several configurations that include one or more of the following attributes:

• The primary efficiency rating is SCOP or iNSenCOP not SEER or EER.
• SEER and EER are not applicable to these products.
• Optimized for net sensible cooling with a sensible heat ratio typically > 0.90, and rating accordingly in kW of cooling.
• Application and rating points differ from comfort cooling applications.
• Some equipment contains optional humidification systems installed within the cooling unit and may also contain heat in order to offset over-cooling that may be caused by dehumidification operation.
• Equipment that is designed specifically for the application in a data center.

Product configurations include:

• Row based units that are either DX units including external condensers, cooling towers or dry cooler heat rejection, or chilled water-cooling units
• Perimeter units that are either DX units including external condensers, cooling towers or dry cooler heat rejection, or chilled water-cooling units
• Ceiling mounted units that are either DX units including external condensers, cooling towers or dry cooler heat rejection, or chilled water-cooling units
• Any of the above configurations may include “free cooling” economizers that utilize air, water, glycol or a refrigerant to provide cooling with the compressors off
• Specifically excluded are the products included in the scopes of other AHRI product type scopes, room air conditioners and heat pumps.
• External units which are ducted to the data center, for example air handlers.

Mechanical refrigeration systems designed with its primary purpose for removing moisture from the air with reheat recovered from the dehumidification process.

Fan-powered air terminals which include a hydronic cooling coil and an airflow regulating primary air valve and in which the primary air valve is in series with the fan and all air flows through the fan. The primary air shall bypass the cooling coil. The cooling coil shall be designed and rated for sensible operation only. The unit may have supplemental heat. Excluded are all products specifically covered by the other AHRI product type scopes.

Heat transfer devices used to exchange heat between two fluid streams that are single phase liquids:

1. Brazed Plate-type Heat Exchangers
2. Fusion Bonded Plate-Type Heat Exchangers

Heat transfer devices used to exchange heat between two fluid streams that are single-phase liquids:

1. Gasketed Plate-type Heat Exchangers
2. Shell and Tube Heat Exchangers, Shell and U-Tube Heat Exchangers, and Shell and Coil Heat Exchangers
3. Tube-in-Tube Heat Exchangers

Factory-made encased assemblies consisting of a fan or fans in parallel which may also include other necessary equipment to perform one or more of the functions of circulating, cleaning, heating, cooling, humidifying, dehumidifying, and mixing of air and that generally have a maximum design external static pressure less than or equal to 1.0 in H2O. It does not include units that have a source of mechanical cooling or that have direct expansion coils which are incorporated by the manufacturer in a matched split system air conditioner or as otherwise defined in the product scope definition of other AHRI product types.

A single package vertical air conditioner consists of a separate encased or un-encased combination of cooling and optional heating components, factory assembled as a single package, and intended for exterior mounting on, adjacent interior to, or through, an outside wall. The major components of the unit are arranged vertically, and may contain separate indoor grille(s), outdoor louvers, various ventilation options, indoor free air discharge, ductwork, wall plenum or a sleeve. Heating components may include electrical resistance, steam, hot water, gas, or no heat, but may not include reverse cycle refrigeration as a heating means. This equipment either alone or in combination with a heating plant, provides air-circulation, air-cleaning, cooling with controlled temperature and dehumidification, and may optionally include the function of heating and possible humidifying and ventilation.

A packaged terminal heat pump consists of a separate, unencased refrigeration system installed in a cabinet of similar function and configuration to that of a packaged terminal air-conditioner. It utilizes reverse cycle refrigeration as its prime heat source and should have available other supplementary heating by hot water, steam, or electric resistance.

Thermal storage equipment used for cooling may be charged and discharged with any of a variety of heat transfer fluids. The equipment may be fully factory assembled; assembled on site from factory supplied components; or field erected in accordance with pre-established design criteria.

Factory-made unit ventilators for all applications and sizes. A unit ventilator is an institutional type assembly, equipped with ventilation and return air dampers capable of introducing ventilation air of at least 80 percent of rated standard air flow, while also providing the functions of circulating or heating, heating or cooling and filtering air. The source of humidity control, heating or cooling supplementary to that from ventilation air, may be remote of an integral part of the unit itself. This equipment is designed for free delivery of air into a room but may be applied with minimal duct work having a static resistance normally not exceeding 0.50 inches water column. This equipment is provided with air capacities of 3000 cfm or less. Excluded are individual assemblies such as a cooling or heating section for separate use, and the following equipment:

1. Room air conditioners as defined in AHAM standard RAC-1.
2. Room fan-coil and air induction units as defined in ARI standards 440 and 445.
3. Packaged terminal air conditioners and heat pumps as defined in ARI standard 310/380.
4. Central-station air handling units as defined in ARI standard 430.

Ducted devices, used to deliver air into/or remove air from a space and which provide control of air volume, direction, temperature, and/or pressure. Specifically included are the following devices:

• Diffusers
• Constant or Variable Volume Air Terminals

Excluded are all grilles and registers and those products specifically covered by other AHRI product type scopes.

A factory-made and prefabricated assembly (not necessarily shipped as one package) of one (1) or more compressors, condensers, and evaporators, with interconnections and accessories including controls, designed for the purpose of cooling or heating water. It is a machine specifically designed to make use of a vapor compression refrigeration cycle to transfer heat from a cold water fluid circulating system to a warm water fluid circulating system. This product type includes heat pump and heat recovery water heating packages, condenserless, evaporatively cooled and absorption chillers, as well as units that use fluids other than fresh water.