The exact model and suffix are particularly important when purchasing replacement fans.

A product family name or catalog maximum does not necessarily represent the configuration installed in the field.

For an existing fan, the nameplate can provide valuable information about the original configuration. Combining the nameplate data with actual airflow, pressure and operating conditions provides a much stronger basis for replacement selection.

From Fan Selection to Fan Verification

This is where fan selection becomes an engineering task rather than a catalog search. A practical workflow is:

Measure → Analyze → Select → Verify

(1) Measure

Collect the actual application requirements:

(2) Analyze

Compare the required duty point with available fan curves and determine the expected input power and operating range.

(3) Select

Choose the appropriate fan type, model and configuration based on the actual application — not simply the largest airflow rating or highest motor efficiency class.

(4) Verify

Check the complete configuration, including:

This process is particularly important when replacing an existing fan or cross-referencing between different brands.

What Should OEMs Do Now?

The draft does not require immediate product redesign. Until the final standard is published and takes effect, GB 19761-2020 and GB 18613-2020 remain the basis for product release. But the transition period is a good time to close documentation gaps:

Instead of asking only "Which motor has the highest efficiency rating?", OEM teams should also ask: "Which fan configuration delivers our required airflow and pressure with the lowest practical electrical input?"

That is a more complete engineering question — and a more reliable basis for procurement.

FAQ

Q1: Is the 2026 draft fan efficiency standard already mandatory?

No. It was a public consultation draft, and the comment period closed on September 18, 2026. It has not been published as a final standard and is not in force. The official plan pages indicate implementation 12 months after formal publication.

Q2: Does an IE4 or IE5 motor prove that a fan meets the proposed efficiency grade?

No. Motor efficiency is only one part of the proposed system boundary. Controller, transmission and aerodynamic losses also affect the result.

Q3:  What is the difference between motor efficiency and wire-to-air efficiency?

Motor efficiency measures the motor alone. Wire-to-air efficiency measures the complete fan system — from electrical input to delivered air power. The draft evaluates the latter.

How Beijinghengrui Supports Fan Selection

As efficiency evaluation moves toward a wire-to-air view, the documentation behind a selection matters as much as the selection itself. This is where Beijinghengrui works with OEMs and engineering teams: from model identification and nameplate checks to airflow/pressure verification, fan curve matching, replacement selection, cross-reference and sourcing coordination. When an original model is discontinued or unavailable, the goal is not simply to find a fan with similar dimensions, but to identify a replacement that matches the required performance, electrical configuration and operating conditions.

For a selection or replacement review, send us the fan nameplate photo together with your required airflow, static pressure, voltage and installation conditions — we will verify the duty point and confirm a matched model or replacement with its supporting configuration details.

An efficient motor is a good starting point, but the right fan selection completes the equation.