CPCB approved RECDChoosing a requires more than comparing prices or accepting a supplier's claim at face value. A genuine purchasing decision should be based on the exact product model, applicable DG-set specifications, supporting certification or testing documentation, installation requirements, and current regulatory provisions.

For organizations operating diesel generators, the objective should be simple: purchase an emission-control solution that is technically appropriate, properly documented, professionally installed, and supported throughout its service life. Since CPCB requirements and certification information can change, buyers should always verify the latest official information before making a compliance-related decision.

Start With a Clear Purchase Requirement

Before contacting RECD suppliers, create a basic specification sheet for your DG set.

Include:

DG-set manufacturer
Engine manufacturer
Engine model
Generator capacity
Engine category or phase, where applicable
Number of generators
Installation location
Existing exhaust arrangement
Operating conditions
Required installation schedule

This information allows suppliers to understand the application before recommending a product.

A supplier that immediately recommends an RECD without requesting basic generator information may not have completed an adequate technical assessment.

What Does “Genuine Certification” Mean?

The word “genuine” is particularly important when dealing with certification-related claims.

A product should be traceable to identifiable documentation. Buyers should be able to determine:

Who manufactured the product?
What is the exact model?
What generator or engine range does it cover?
What testing or certification documentation exists?
Which agency is identified in the documentation?
Are there validity or conformity requirements?
Does the documentation correspond to the product being offered?

CPCB's published RECD procedure provides a framework for emission-compliance testing and certification of applicable retrofit emission-control devices. It includes product-specific information rather than treating every RECD as interchangeable.

Don't Buy From the Brochure Alone

A brochure is useful for understanding a product, but it should not be the only basis for a compliance-sensitive purchase.

A professional procurement file should ideally contain:

Technical Datasheet

This explains the product's specifications and intended application.

Product Identification

The exact model and configuration should be clearly stated.

Certification or Test Documentation

Where applicable, request the relevant supporting documentation.

Installation Information

The supplier should explain installation requirements and limitations.

Warranty Documentation

Understand what is covered and for how long.

Maintenance Information

Know what servicing and inspections are expected.

These documents collectively provide a stronger basis for evaluating the purchase.

Check Generator Compatibility

Certification alone does not eliminate the need for technical matching.

Your RECD should be evaluated against the actual generator.

Important factors can include:

Generator capacity
Engine model
Engine family
Applicable emission stage
Exhaust configuration
Operating conditions
Installation limitations

The supplier should have sufficient information to determine whether the proposed product is appropriate for the intended DG set.

Never assume that an RECD designed for one generator capacity is automatically suitable for another.

Examine Certification Details Carefully

CPCB's published RECD documentation contains product-specific fields such as RECD family, type/model, engine or engine-family application range, category, PM reduction efficiency, applicable regulation/stage information, and certificate validity.

These details are useful when evaluating a product.

Rather than asking only, “Is this CPCB approved?”, ask:

“Please provide the documentation for the exact RECD model being offered and explain its applicable generator and engine range.”

This produces a much more meaningful procurement conversation.

Check Certificate Validity and Related Requirements

A certificate should not be treated as a permanent approval without checking its conditions.

CPCB's RECD procedure includes provisions concerning conformity-of-production activities and certificate validity.

Therefore, buyers should review:

Certificate date
Validity information
Applicable conformity requirements
Product model
Relevant certification agency
Current status of the certification

If an old document is provided, request confirmation of its current applicability.

Compare Suppliers on More Than Price

The cheapest quotation is not necessarily the best purchase.

Consider the complete package:

Equipment Cost

What exactly is included in the quoted price?

Installation

Does the supplier include installation or charge separately?

Commissioning

Is technical commissioning support included?

Warranty

What components and services are covered?

Maintenance

What periodic maintenance is required?

Spare Parts

Can replacement components be obtained easily?

Technical Support

Who will assist if a problem occurs?

A slightly higher quotation can represent better value when the supplier provides a more comprehensive technical and service package.

Questions to Ask Before Buying

A buyer should be comfortable asking detailed questions.

About the Product

What is the exact RECD model?
Which generator range is it designed for?
Which engine models or families are applicable?

About Documentation

Can you provide the relevant certification or test documents?
Which agency conducted the applicable testing?
What conditions are associated with the documentation?

About Installation

Is site inspection required?
What modifications are necessary?
Who performs the installation?
Is commissioning included?

About Support

What is the warranty period?
What maintenance is required?
Are spare parts available?
Is technical support provided after installation?

The answers should be documented as part of the procurement process.

Evaluating CPCB approved RECD manufacturers

CPCB approved RECD manufacturersWhen comparing , focus on evidence and technical capability rather than the wording used in advertisements.

A credible supplier should be able to clearly explain the relationship between its product model and the supporting documentation.

Look for suppliers that can provide:

Identifiable product models
Relevant technical specifications
Certification or testing documentation
Generator applicability information
Installation assistance
Maintenance guidance
Warranty documentation
After-sales technical support

The manufacturer should also be transparent about the limits of its certification or testing documentation.

Most importantly, independently compare supplier information with current official CPCB material and applicable regulatory requirements.

Watch for Common Buying Mistakes

Mistake 1: Choosing Only on Price

A low quotation may exclude installation, warranty, maintenance, or other services.

Mistake 2: Accepting “CPCB Approved” Without Documents

A marketing statement is not a substitute for verifiable documentation.

Mistake 3: Ignoring the Engine Model

Generator capacity alone may not provide enough information for technical selection.

Mistake 4: Buying Before Site Assessment

Physical installation conditions can affect the project scope.

Mistake 5: Forgetting After-Sales Support

An RECD is not simply a one-time purchase. Maintenance and technical support matter.

Mistake 6: Using Outdated Regulatory Information

Environmental requirements can change. Always verify the latest official position.

What Should Be Included in Your Purchase File?

After selecting the supplier, maintain a complete record containing:

Purchase order
Supplier quotation
RECD model information
Technical datasheet
Certification/test documentation
Installation records
Commissioning information
Warranty certificate
Maintenance instructions
Service records
Relevant regulatory references

For organizations operating several DG sets, maintaining individual files can make future technical reviews easier.

A Simple Pre-Purchase Decision Test

Before approving an RECD purchase, ask five questions:

1. Is the product clearly identified?

You should know the exact model being purchased.

2. Is the documentation verifiable?

Certification or testing claims should have supporting evidence.

3. Does it match the generator?

The proposed product should be evaluated against the actual engine and generator specifications.

4. Is installation properly planned?

Responsibilities, site requirements, and commissioning should be clear.

5. Is the regulatory position current?

Check the latest CPCB, MoEFCC, and applicable SPCB requirements.

If any answer is unclear, pause the purchase and obtain clarification.

Genuine Certification Is Only One Part of the Decision

A properly documented product is important, but buyers should avoid treating certification as the only measure of quality.

A complete evaluation should consider:

Technical suitability
Documentation
Installation quality
Maintenance
Warranty
Spare parts
Supplier experience
Technical support
Total cost of ownership

The right RECD is ultimately the one that fits the specific application and can be properly supported throughout its operational life.

Final Takeaway

CPCB approved RECDBuying an RECD should be an evidence-based procurement decision. A should be evaluated by checking the exact model, applicable generator and engine range, supporting certification or testing documentation, installation requirements, certificate status, warranty, maintenance, and technical support. Generator owners should never rely exclusively on phrases such as “CPCB approved” in advertisements or quotations. Instead, request the underlying documentation and match it with the product actually being offered.

CPCB Approved RECD: A Buyer's Guide to Genuine Certification

What to Check Before You Buy — Spotting Genuine Certification vs Misleading Claims