Of all the appliance choices in a modular kitchen, the chimney decision has the most lasting impact — not just on your indoor air quality, but on your cabinet surfaces, paint job, and even your neighbours’ tolerance for cooking smells. Get it wrong and you’re either dealing with a chimney that can’t actually handle Indian cooking or paying for ductwork that your apartment wasn’t designed to accommodate.
We’ve installed and serviced hundreds of both ducted and ductless chimneys across Delhi NCR. Here’s a straightforward comparison of ducted vs ductless chimneys for Indian kitchens — how they work, what they cost, and which one actually suits a closed apartment kitchen.
How Each System Works
Ducted chimneys draw air through a mesh filter (to catch oil and large particles), then push the air outside via a pipe that runs through the ceiling or wall. The air — along with the smoke, oil vapour, heat, and humidity — leaves your kitchen entirely. The outdoor duct outlet is usually on the nearest exterior wall or routed through the ceiling to a wall that faces outside.
Ductless (recirculating) chimneys pass the air through two filters: a mesh filter for oil and a charcoal filter for odour. The charcoal filter traps smell particles, and the cleaned air is released back into the kitchen. No external ducting is needed — the chimney recirculates air within the room. Crucially, the heat and humidity stay inside, which matters more than most people realise.
The Indian Cooking Factor
This is where the choice becomes less about theory and more about real daily use. Indian cooking produces three things that a chimney needs to handle: smoke from high-temperature oil, steam from boiling and pressure cooking, and odour from spices and tadka. Ducted chimneys handle all three effectively because they remove the air entirely. Ductless chimneys can handle smoke and odour reasonably well (with good charcoal filters) but they cannot remove heat and humidity.
In a closed Indian kitchen, that trapped heat and humidity matters. We’ve seen kitchens where a ductless chimney ran for years and the cabinet edges nearest the hob started peeling because of repeated steam exposure. The cabinets stayed warm and moist long after cooking finished, accelerating edge-band failure and, in extreme cases, minor mould growth in corner areas with poor ventilation.
If your kitchen is open to the living or dining room, a ductless chimney might work fine because the humidity disperses into the larger space. But for a closed kitchen — the kind most Delhi NCR apartments have — ducted is almost always the better choice for long-term cabinet health.
Cost and Installation Comparison
| Factor | Ducted Chimney | Ductless Chimney |
|---|---|---|
| Unit cost (60cm, mid-range) | ₹8,000 – ₹15,000 | ₹6,000 – ₹12,000 |
| Installation cost | ₹2,000 – ₹4,000 | ₹1,000 – ₹2,000 |
| Ducting work (if needed) | ₹3,000 – ₹6,000 | Not required |
| Charcoal filter replacement | Not needed | ₹1,500 – ₹3,000 every 6-12 months |
| Electricity consumption | Similar | Similar |
| 5-year total cost (approx) | ₹14,000 – ₹25,000 | ₹14,000 – ₹26,000 |
Notice something? The 5-year total cost is nearly identical. The ductless chimney’s lower upfront cost is offset by recurring charcoal filter replacements. So cost alone shouldn’t drive your decision — the difference in experience matters more.
Suction Power: What the Rating Numbers Mean
Chimney suction is measured in cubic metres per hour (m³/h). For Indian cooking, you need at least 1200 m³/h for a ducted chimney and 1400 m³/h for a ductless one. The higher requirement for ductless chimneys is because the air has to pass through two filters before being released, which creates more resistance. A 1200 m³/h ducted chimney will feel noticeably stronger than a 1200 m³/h ductless one in real use.
One thing we often see is people buying an under-powered chimney because the price was right. A 900 m³/h chimney in a kitchen where you make tadka daily is money wasted — it simply won’t capture the smoke fast enough, especially in a closed kitchen. Spend the extra ₹3,000–₹5,000 on a higher-rated model. The difference in daily experience is significant.
Noise Levels and Maintenance
Ducted chimneys tend to be slightly quieter at the same suction rating because the motor doesn’t have to work as hard to push air through filters. The noise difference is modest — maybe 3-5 decibels — but noticeable if you spend a lot of time in the kitchen.
Maintenance-wise, both types need regular cleaning of the mesh filter (once a week with warm soapy water). The ductless chimney additionally needs its charcoal filter replaced every 6 to 12 months, depending on usage. A family that cooks three meals a day will need replacement closer to the 6-month mark. This is an ongoing cost that some buyers forget to factor in.
Our Recommendation for Delhi NCR Apartments
For a closed Indian kitchen, choose a ducted chimney if your apartment allows ducting to an exterior wall. The heat and humidity removal alone makes it worthwhile for protecting your cabinets long-term. Most Delhi NCR apartments built after 2010 have a dedicated chimney duct or at least an exterior wall near the kitchen where ducting can be routed.
Choose a ductless chimney only if you have no exterior wall access for ducting — which happens in some high-rise apartments and basement kitchens — or if your kitchen is fully open to the living room where humidity can disperse naturally.
In either case, don’t compromise on suction power. Get at least 1200 m³/h for ducted and 1400 m³/h for ductless. And if you buy ductless, set a reminder to replace the charcoal filter every 6 months — a clogged charcoal filter makes the chimney functionally useless for odour removal.
Frequently Asked Questions
Can a ductless chimney handle Indian cooking?
It can handle smoke and odour with a good charcoal filter, but it won’t remove heat and humidity from the kitchen. For occasional cooking or open kitchens, it’s acceptable. For daily Indian cooking in a closed kitchen, ducted is strongly recommended.
How much does chimney ducting cost in Delhi NCR?
Ducting installation typically costs ₹3,000–₹6,000 depending on the distance to the nearest exterior wall and whether ceiling work is needed. Some fabricators include this in their overall kitchen installation package — always ask before finalising the quote.
Do ductless chimneys need an exterior wall?
No. That’s their main advantage. They recirculate air internally, so they can be installed anywhere there’s a power point and space above the hob. This makes them the only option for kitchens without exterior wall access.
What happens if I don’t replace the charcoal filter?
The chimney still runs and still filters oil through the mesh, but it stops removing odour effectively. The air being recirculated will carry cooking smells throughout the kitchen. A clogged charcoal filter also forces the motor to work harder, which increases noise and power consumption.