RO water purifiers featuring hot, cold, and ambient functions are becoming increasingly popular due to their convenience and versatility. As a household electrical appliance capable of instantaneous water heating, this product must obtain Regulation Conformity Certification according to QCVN 4 before being circulated on the market.

This article by the ISSQ Institute of Quality will clarify why these multi-functional RO purifiers require QCVN 4 certification and outline the step-by-step certification process.

Overview of RO Water Purifiers

An RO (Reverse Osmosis) water purifier uses a membrane with microscopic pores to remove almost all impurities, bacteria, viruses, heavy metals, and toxic chemicals from water. As a result, the filtered water reaches a high level of purity and can be consumed directly without boiling. Some models also add essential minerals to support user health.

The hot-cold-ambient RO purifier is an integrated device providing three water modes:

• Hot water: For tea, coffee, or formula.

• Cold water: For refreshing drinks.

• Ambient water: Pure water for daily direct consumption.

The integration of heating and cooling systems classifies these devices not just as water filters, but as household electrical appliances subject to strict safety requirements.

List of Electrical and Electronic Equipment under QCVN 4

QCVN 4 is the National Technical Regulation specifying safety and management requirements for electrical and electronic equipment listed in its Appendix. It serves as the legal basis for controlling electrical, thermal, and fire risks.

This regulation applies to organizations and individuals manufacturing, importing, or distributing regulated electrical equipment. The list primarily includes:

1. Instantaneous water heaters

2. Water heaters and hot water storage tanks

3. Hair dryers and other hair-care appliances

4. Kettles

5. Rice cookers

6. Electric fans

7. Electric irons

8. Microwave ovens

9. Portable electric ovens and grills

10. Wires and cables

11. Immersion heaters

12. Tea or coffee makers

13. Hand dryers

Within this list, RO water purifiers with hot-cold functions are classified as instantaneous water heaters. They must comply with TCVN 5699-2-35:2013 (IEC 60335-2-35:2012), which replaces the 2007 version. This standard specifies safety requirements for rapid water heaters intended for household use, designed to heat water below its boiling point, with a rated voltage not exceeding 250V for single-phase devices and 480V for others.

Benefits of QCVN 4 Certification

Beyond being a legal requirement, obtaining certification offers several practical advantages:

• Ensures products meet all electrical and thermal safety standards.

• Minimizes the risk of product recalls and administrative fines.

• Provides a clear legal foundation for import and distribution.

• Enhances brand reputation and consumer trust.

• Facilitates participation in bidding and distribution through retail chains, supermarkets, and large-scale projects.

The Certification Process

To ensure an RO water purifier meets QCVN 4 safety requirements, the process consists of these basic steps:

Hot-cold-ambient RO water purifiers are versatile household appliances that require strict control. Implementing QCVN 4 conformity certification not only fulfills state management requirements but also guarantees quality and safety for users.

If your company requires certification services for RO water purifiers, please contact the ISSQ Institute of Quality:

• Hotline: 0981851111

• Email: vienchatluong@issq.org.vn | tcvn@issq.org.vn

Published Date: December 17, 2025