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GB/T 46751-2025Low regeneration temperature rotary solid desiccant outdoor air processors (English PDF)

低温再生转轮调湿新风机组

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Issued by

SAMR; SAC

Level / Type

National · Recommended

Issue date

October 31, 2025

Implementation date

May 1, 2026

Scope

GB/T 46751-2025 is the English-translated version of 低温再生转轮调湿新风机组.

GB/T 46751-2025 is the Chinese standard "Low regeneration temperature rotary solid desiccant outdoor air processors".

Its scope clause reads: This document specifies the classification and marking, general requirements, requirements, and testing of low-temperature regenerative rotary dehumidifying fresh air handling units (hereinafter referred to as "units").

Methods, inspection rules, and marking, packaging, transportation and storage. This document applies to low-temperature regeneration rotary dehumidification fresh air handling units that employ rotary adsorption dehumidification and have a regeneration temperature not exceeding 70°C. Its clauses include terms and definitions.

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Document preview — GB/T 46751-2025

National Standard of the People's Republic of China

ICS: 91.140.30
Classification: P 48

Issued by: State Administration for Market Regulation; Standardization Administration of the PRC

Preface
1.Scope
2 Normative References
3.Terms and Definitions
4.Classification and Labelling
5 General Requirements
6 Requirements
7.Test Methods
8 Inspection Rule
9.Marking, Packaging, Transport and Storage
Appendix A (Informative) Schematic Diagrams and Explanations of Various Generating Unit Structures
Appendix B (Normative) Aerodynamic Performance Test Methods
Appendix C (Normative) Test Method for Net Fresh Air Supply Rate
Appendix D (Normative) Test Method for Internal Air Leakage Rate
Appendix E (Normative) Test Method for External Air Leakage Rate
Appendix F (Normative) Test Methods for Thermal Performance

1 Scope

This document specifies the classification and marking, general requirements, requirements, and testing of low-temperature regenerative rotary dehumidifying fresh air handling units (hereinafter referred to as "units").

Methods, inspection rules, and marking, packaging, transportation and storage.

This document applies to low-temperature regeneration rotary dehumidification fresh air handling units that employ rotary adsorption dehumidification and have a regeneration temperature not exceeding 70°C.

2 Normative references

The contents of the following documents, through normative references within the text, constitute essential provisions of this document. Dated citations are not included.

For references to documents, only the version corresponding to that date applies to this document; for undated references, the latest version (including all amendments) applies.

This document.

GB/T 1236-2017 Performance Test of Standardized Air Ducts for Industrial Ventilation Fans

GB/T 4706.32 Safety of household and similar electrical appliances - Part 32.Particular requirements for heat pumps, air conditioners and dehumidifiers

GB/T 14295 Air Filters

GB/T 14296 Air coolers and air heaters

GB/T 16803 Terminology for Heating, Ventilation, Air Conditioning and Purification Equipment

GB 17625.1 Electromagnetic compatibility limits - Part 1.Harmonic current emission limits (equipment input current per phase <= 16A)

GB/T 17758-2023 Unitary Air Conditioners

GB/T 21087 Heat recovery fresh air handling units

GB/T 34012 Air purification devices for ventilation systems

3 Terms and Definitions

The terms and definitions defined in GB/T 16803 and the following terms and definitions apply to this document.

3.1

The air temperature entering the dehumidification rotor regeneration zone.

3.2 cessor

Using a dehumidifying rotor with a regeneration temperature not exceeding 70°C as the basic component, and other air handling units as auxiliary components, it can handle fresh air.

Air conditioning units that perform dehumidification, humidification, cooling, heating and purification.

3.3

When performing rotary adsorption dehumidification treatment on the fresh air supplied to the room, the unit type that uses outdoor fresh air as the rotary desorption regeneration airflow.

3.4

When performing rotary adsorption dehumidification treatment on the fresh air supplied to the room, the unit type that uses indoor exhaust air as the rotary desorption regeneration airflow is used.

GB/T 39976 | GB/T 19232 | GB 50243 | GB/T 14294 | GB/T 46752 | […]

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This preview omits tables, figures, formulas and parts of the technical clauses. The complete document — 34 pages — is available in the English PDF.

Referenced standards

Normative references

Cited by

GB/T 46752-2025Integrated high-efficiency air conditioning cold source systems for buildings

Editions of GB/T 46751

Edition	Title	Revision	Status
GB/T 46751-2025	Low regeneration temperature rotary solid desiccant outdoor air processor	current edition	Current

This page sells the current edition, GB/T 46751-2025. Earlier editions are listed for reference only.

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