CPCB approved RECDFinding a is not simply a matter of choosing a product with the right marketing description. For diesel generator owners, the more important question is whether a particular RECD model is supported by appropriate certification or testing documentation and whether its stated applicability matches the generator being considered. CPCB publishes information on certified RECD manufacturers and their applicable generator power ranges, making official verification an important part of the buying process.

For organizations operating DG sets in factories, hospitals, commercial buildings, telecom facilities, warehouses, educational institutions, infrastructure projects, and other locations, understanding the certification framework can make supplier evaluation easier. This guide explains how CPCB's published RECD information can be used, what buyers should compare, and why manufacturer names alone should not be treated as proof of suitability.

What Is an RECD Certification Framework?

RECD stands for Retrofit Emission Control Device. CPCB has established a system and procedure for emission compliance testing of retrofit emission-control devices for diesel power-generating set engines up to 800 kW gross mechanical power. The published CPCB procedure was revised in July 2023.

The certification framework includes technical evaluation and documentation related to RECD type approval and conformity of production. CPCB's documentation also provides a certificate format identifying details such as the manufacturer, RECD model, application range, RECD family, and PM reduction efficiency.

This is important because certification is linked to defined products and applications rather than being a blanket statement that every RECD from a company is suitable for every generator.

Why the Power Range Matters

One of the most important details in CPCB's published list is the applicability range.

For example, a manufacturer may have a certified RECD configuration for one range of generator engines but not necessarily for every generator capacity.

The CPCB list identifies specific ranges for individual configurations. It also distinguishes between Phase I and Phase II engines in applicable entries.

Therefore, buyers should provide their supplier with accurate information about:

DG set capacity
Engine manufacturer
Engine model
Engine phase/category
Existing installation
Operating conditions

This information helps determine whether the proposed RECD corresponds to the relevant certified application.

Certification Agency Is Another Important Detail

CPCB's published list also identifies the certification agency associated with listed RECD configurations.

The current CPCB list includes certification references to agencies such as:

ICAT
ARAI

The agency and applicable product details vary by manufacturer and RECD configuration.

Buyers should therefore request the actual supporting certificate or technical documentation instead of relying solely on a supplier's statement that its product is “CPCB approved.”

Do Manufacturer Names Prove Compliance?

No.

A manufacturer appearing on an official list does not automatically mean that every product sold by that company is applicable to every diesel generator.

This distinction is especially important for procurement teams.

A buyer should verify:

Manufacturer name
RECD model or type
Certified power range
Engine applicability
Applicable phase/category
Certification agency
Relevant certificate or test documentation
Current regulatory requirements

This model-specific approach provides a much stronger basis for procurement decisions.

Why Product Documentation Matters

A genuine technical documentation package should allow buyers and engineers to understand what is being purchased.

Depending on the product, documentation may include:

Product specifications
Model identification
Application range
Installation instructions
Test or certification documentation
Maintenance information
Warranty terms

CPCB's certification template itself identifies technical information such as RECD type/model designation, engine or engine-family application range, PM reduction efficiency, and certificate validity.

These details can be particularly valuable when an organization operates several DG sets with different specifications.

What About Older Lists?

Regulatory and certification information can change.

A manufacturer or product may appear in a document published at an earlier date, while newer documentation may subsequently become available. Similarly, the applicable regulatory requirements for a particular installation may change.

Therefore, buyers should not rely indefinitely on an old PDF, quotation, brochure, or website page.

Before placing an order, check the latest official CPCB information and confirm the applicable requirements with the relevant authorities or qualified technical professionals.

Selecting CPCB approved RECD manufacturers

CPCB approved RECD manufacturersWhen evaluating , the first step should be to compare official documentation with the technical specifications of your DG set.

A suitable supplier should be able to explain:

Which RECD model is being proposed
What generator range it covers
Which engine category or phase applies
What certification or test documentation supports the product
What installation support is available
What maintenance is required
What warranty is offered

A transparent manufacturer should also encourage customers to independently verify regulatory information rather than presenting “CPCB approved” as an unrestricted claim.

Don't Ignore Installation and Maintenance

Certification is only one part of a successful RECD project.

The system must also be installed and maintained appropriately for the intended application.

Before purchase, discuss:

Installation

Determine whether installation is included, recommended, or handled separately.

Site Requirements

Confirm available space, exhaust configuration, accessibility, and other project-specific conditions.

Maintenance

Understand inspection intervals, cleaning requirements, consumable components, and service procedures.

Technical Support

Ask how troubleshooting and warranty requests are handled after commissioning.

These factors can have a significant effect on the long-term value of the installation.

A Practical Verification Process

Before approving a supplier, follow this sequence:

Identify the DG set → Identify the proposed RECD model → Check official CPCB documentation → Verify power-range and engine applicability → Review certification/test documents → Confirm installation requirements → Check warranty and service support → Verify current CPCB/SPCB requirements.

This is a verification framework, not a substitute for the applicable official procedure or technical assessment.

Final Takeaway

CPCB's published RECD information provides buyers with a useful starting point for evaluating manufacturers and products. The official list identifies certified manufacturers, applicable generator power ranges, engine phases, and certification agencies, while CPCB's testing procedure and certificate framework provide additional technical context. For organizations planning an RECD installation, the safest approach is to combine official CPCB documentation with technical evaluation, manufacturer documentation, professional installation, and confirmation of applicable State Pollution Control Board requirements.

CPCB Approved RECD: List of Certified Products & Manufacturers

Your Reference List of Genuinely Certified RECD Products and Trusted Manufacturers in India