Emission control / RECD, retrofit ready.
Cut your diesel generator's particulate matter emissions by 90%+ with a CPCB-compliant Retrofit Emission Control Device. Keep the genset, meet the norms.
- 90%+ PM reduction
- CPCB / DPCC compliant
- 50 – 6,000 kVA
- Filterless
A compliance upgrade for a running DG — without scrapping the asset.
A Retrofit Emission Control Device (RECD) — also called an Emission Control Device (ECD) — is an engineered product installed on a running diesel genset’s exhaust. It drastically reduces Particulate Matter along with Hydrocarbons, Carbon Monoxide and Nitrogen Oxides, while the genset keeps operating normally.
OVN, in partnership with Pi Green Innovations, brings a patented filterless PM-reduction technology to North India. We have models from 50 kVA up to 6,000 kVA, and our reference deployment is at the Hero MotoCorp plant in Andhra Pradesh.
Not sure whether a RECD is mandatory for your genset? Use our free RECD compliance checker — enter your kVA and state to see if it’s required and get an indicative cost before you talk to us.
Seven reasons to retrofit.
90%+ PM reduction
Filterless technology from Pi Green Innovations cuts Particulate Matter emissions by over 90% on running diesel gensets.
CPCB / DPCC compliant
Meets the CPCB and DPCC mandate for PM reduction on gensets above 125 kVA — Delhi, Haryana, Gujarat and a growing list of states.
Keep the genset, add compliance
Your existing diesel generator continues to serve. The retrofit is an exhaust-side addition, not a replacement project.
50 – 6,000 kVA coverage
Different RECD models cover the full industrial range — we size the unit to your genset's exhaust specs.
Filterless
No consumable filter, no PM-laden waste to dispose of. Lower total cost of ownership vs filter-based solutions.
Reference: HMC Andhra
OVN's reference installation is at Hero MotoCorp's plant in Andhra Pradesh — large diesel gensets retrofitted with the same technology.
Less HC, CO, NOx too
Alongside PM, the device reduces Hydrocarbons, Carbon Monoxide and Nitrogen Oxides.
What CPCB actually requires — and how a retrofit meets it.
CPCB’s emission norms tightened the limits for diesel gensets, and state Pollution Control Committees — DPCC in Delhi, HSPCB in Haryana, and others — now expect existing sets to either meet the newer particulate limits or carry an approved emission-control route. For a genset already in service, a Retrofit Emission Control Device (RECD) is that route: an exhaust-side device that cuts Particulate Matter to compliant levels without touching the engine or replacing the set.
Who it applies to.Applicability is driven by kVA rating, the genset’s age and your state’s circular — in NCR the RECD mandate commonly starts around 125 kVA and runs up through large industrial sets. Rather than guess, enter your kVA and state in our RECD compliance checker to see whether it’s required for you.
Retrofit vs. new. Replacing a healthy diesel genset with a new CPCB IV+ set is a capital project. A retrofit is a fraction of that cost, keeps your existing asset running, and installs on the exhaust in a planned shutdown window — which is why most operators facing a notice retrofit first and plan replacement only at end of life.
Approvals and paperwork.The device we install is from a CPCB-recognised RECD manufacturer, and we hand over the manufacturer’s certification and commissioning documentation so you can close out the requirement with your Pollution Control Committee.
Frequently asked questions
What is RECD / an Emission Control Device?
RECD stands for Retrofit Emission Control Device. It's an exhaust-side device added to a running diesel genset to reduce particulate matter (PM) and other pollutants to CPCB-compliant levels — without replacing the genset. ECD (Emission Control Device) is the same product, named more generally.
Is RECD mandatory for my generator?
For diesel gensets above 125 kVA in Delhi (DPCC), Haryana, Gujarat and several other states — yes, CPCB norms mandate PM reduction. Check your state Pollution Control Committee circular. If you're unsure, send us the genset details and we'll tell you.
Which DG sets need a RECD?
Applicability is set by your state Pollution Control Committee and depends on the genset's kVA rating, its age and whether it already meets current CPCB norms. In NCR, DPCC has mandated RECD retrofit or an equivalent approved emission-control route on existing diesel gensets that can't otherwise meet PM limits — commonly from 125 kVA upward. Exact thresholds and deadlines vary by state and genset size, so check the circular for your location or use our free RECD compliance checker.
RECD retrofit or a new CPCB IV+ genset — which makes sense?
If your diesel genset is otherwise healthy and has years of life left, a retrofit emission control device is far cheaper than replacing the whole set — you keep the asset and add compliance on the exhaust side. Replacing with a new CPCB IV+ genset usually only makes sense when the existing unit is near end of life or badly undersized. Send us the make, kVA and age and we'll tell you honestly which route is better value.
Are you a CPCB-approved vendor for RECD?
The RECD we supply and install is manufactured by a CPCB-recognised technology partner (Pi Green Innovations) whose filterless device is tested against the required norms. We handle supply, installation and commissioning, and provide the manufacturer's certification and test documentation you need for your Pollution Control Committee filing. If your tender requires a device from the CPCB approved list, share the requirement and we'll confirm the matching model.
Which RECD device do you install?
A filterless retrofit emission control device based on Pi Green Innovations' patented technology, in models covering 50 to 6,000 kVA. There is no consumable filter to replace and no PM-laden waste to dispose of — we size the unit to your genset's exhaust configuration.
Will it derate or affect my generator's performance?
No material derating. Back-pressure is engineered within OEM limits — we check at commissioning and confirm the genset is within spec. We've installed these from small industrial units up to Hero MotoCorp's plant gensets.
Is the device filter-based?
No — this is a filterless patented technology. No recurring filter replacement cost, no PM waste handling.
How much does RECD installation cost?
RECD installation cost depends mainly on your genset's kVA rating and exhaust configuration — a single small unit is very different from a 2,000 kVA retrofit. For an indicative figure use our free RECD compliance checker, and send us the genset details for a firm quote on supply and installation.
Is a RECD the same as an 'air pollution control device' for a generator?
Yes. RECD (Retrofit Emission Control Device), ECD (Emission Control Device) and 'air pollution control device for a generator' all describe the same class of exhaust-side equipment fitted to a running diesel genset to cut particulate matter and other pollutants to CPCB-compliant levels.
Do you provide compliance certificates?
Yes. Manufacturer certification and installation documentation support your compliance filings with the state PCC.
Facing a DPCC notice or CPCB deadline?
Share genset details — we'll confirm compliance scope and quote the RECD retrofit.