Exhaust Fan Size Chart: Choose the Perfect Size for Your Space

The right exhaust fan size depends on your room type and volume — a 150 mm fan suits small bathrooms, while a 300 mm fan handles large kitchens. Prices start at Rs. 1,050. Here is what this article covers:

• Exhaust fans for Indian homes come in 150 mm, 200 mm, 250 mm, and 300 mm sizes
• A simple CFM formula helps you calculate the exact airflow your room needs
• Small bathrooms need at least 50 CFM; large kitchens need up to 250 CFM
• Prices range from Rs. 1,050 (RR Signature Vento Deluxe) to Rs. 2,150 (Havells Ventil Air DX)
• BLDC motor models such as the Atomberg Efficio offer energy-efficient ventilation
   

You can convert the cost into Easy EMIs using Bajaj Finance's financing options at over 1.5 lakh partner stores such as Reliance Digital, Croma, Vijay Sales, and more. Check your loan eligibility before getting started.

An exhaust fan removes moisture, smoke, odours, and stale air from enclosed spaces such as bathrooms and kitchens. Installing one that is too small leaves the room humid and smelly. Installing one that is too large wastes electricity and pulls conditioned air out of your home faster than needed.

Getting the size right means better air quality, lower electricity bills, and less chance of mould or structural damage to your walls. Standard residential exhaust fans in India range from 150 mm to 300 mm in sweep size, covering everything from compact bathrooms to large open kitchens.
 

You can explore more about exhaust fans and kitchen exhaust fans before visiting a partner store to compare models in person.

The size of an exhaust fan determines how quickly it can clear a room of moisture, odours, and pollutants. A correctly sized fan works efficiently without running at extreme speeds, which keeps noise levels low and energy use in check. Here is what proper sizing achieves:

• Prevents structural damage: A well-sized fan removes enough moisture to stop paint from peeling and prevent wood rot on walls and ceilings.
• Improves air quality: The right unit effectively clears allergens, cooking fumes, and pollutants, making the space safer to breathe in.
• Optimises energy use: Correct sizing avoids the higher electricity costs that come with running an oversized motor unnecessarily.
• Reduces noise: A fan that fits the space does not need to run at high speed constantly, resulting in quieter operation day to day.

To find the right fan CFM for your space, follow these four steps:

1. Measure the room volume: Multiply the length, width, and height of your room in feet to find the total cubic feet. For example, a 10 x 10 ft room with an 8-foot ceiling has a volume of 800 cubic feet.
2. Decide on air changes per hour: Kitchens typically need 15 air changes per hour. Bathrooms need around 8. Bedrooms and offices generally need 6–8.
3. Apply the formula: Multiply the room volume by the required air changes per hour, then divide by 60. This gives you the minimum CFM your fan must deliver.
4. Choose a matching fan: Select an exhaust fan with a CFM rating that meets or slightly exceeds your calculated figure. Going slightly higher is fine; going significantly over wastes energy and money.

Different rooms have different ventilation needs based on how they are used and the volume of air they contain. Use this chart as a starting point before checking the CFM calculation for your specific room dimensions:
 

Check out fan sizes in mm for a broader guide to fan dimensions across categories, and fans for office if you are ventilating a workspace.
 

One practical trade-off to keep in mind: a larger exhaust fan moves more air but also pulls conditioned air out of your home faster. In an air-conditioned kitchen or bathroom, this can push your AC to work harder. Matching the fan size closely to your actual requirement — rather than buying the largest available — helps balance ventilation and energy efficiency.

Exhaust fans in India are available across a wide price range to suit different budgets and room sizes. Here is a look at some well-regarded models and what they offer:
 

Disclaimer: Product features, availability, and prices may differ based on location and time. For the latest and most accurate details, visit a partner store or the official brand website.

Please note: Easy EMIs are applicable on purchases above Rs. 5,000.
 

Most exhaust fans in the market are priced below Rs. 5,000. To make the most of Easy EMI financing, consider clubbing your exhaust fan with a useful home accessory — such as a voltage stabiliser, an extension board, or a bathroom accessory kit — to bring your invoice above Rs. 5,000.

Standard residential exhaust fans in India are available in four main sweep sizes. Here is a quick reference to match size with typical use:
 

Always measure your wall or window opening before buying. A fan that is slightly too large will not fit; one that is too small will leave gaps that reduce suction efficiency.
 

Thinking of buying a new fan?

Before you do that, explore the latest offers from Bajaj Finance. You may find a great deal on a model that matches your needs.

Bajaj Finance offers two ways to convert your exhaust fan purchase into affordable monthly payments. Both options are available at over 1.5 lakh partner stores across 4,000 cities in India.
 

How to choose?

Both options require you to be physically present at a partner store. The Insta EMI Card is ideal for shoppers who want to purchase across multiple categories over time. The Easy EMI Loan suits buyers looking to finance a higher-value purchase in a single transaction.
 

Why Bajaj Finance works well for this purchase

With over 1.5 lakh partner stores across 4,000 cities, Bajaj Finance's network means you can finance this purchase whether you are in a metro or a Tier 2 city like Mysuru or Patna. The Insta EMI Card carries zero annual fee, and both options offer repayment tenures across 3 to 60 months, giving you flexibility to match the EMI to your monthly budget.

A longer tenure lowers your monthly EMI but increases the total amount paid over the repayment period. A shorter tenure costs more each month but reduces your overall financing outgo. Factor this in when choosing a tenure.

Buying a new exhaust fan with Bajaj Finance's in-store financing is simple and usually takes just 10–15 minutes. Follow these steps:

1. Browse models on Bajaj Mall: Explore the range of exhaust fan models available on Bajaj Mall. Compare sweep sizes (150 mm–300 mm), CFM ratings, motor types, and prices before heading to the store.
2. Find a partner store near you: Use the Bajaj Finance store locator to find a nearby outlet such as Croma, Vijay Sales, or other authorised retailers.
3. Check the exhaust fan in person: Visit the store and explore available models. Check the sweep size, CFM rating, motor type (BLDC or conventional), noise level, and whether the model includes an automatic shutter or removable grille.
4. Choose a suitable EMI option: At checkout, ask the store executive about the Bajaj Finance Insta EMI Card or Easy EMI Loan. Confirm available tenure options and whether your chosen model — along with any accessories — meets the minimum invoice value for Easy EMIs.
5. Complete payment and schedule installation: Once approved, your purchase is processed immediately and you can schedule installation at your convenience.
    

You can also check your loan eligibility online in advance by entering your mobile number and OTP, helping you plan your purchase better.

Bajaj Finance’s Smart Savings Calculator helps you unlock maximum savings every time you shop at partner stores. It brings together all available brand, dealer, and scheme offers—so you can see your total savings instantly and shop smarter with Easy EMIs.
 

1. Dealer offers - Grab exclusive in-store deals at over 1.5 lakh partner stores across India. Enjoy local discounts and special prices you will not find online.

2. Brand offers - Access limited-time discounts from top brands across electronics, appliances, and more. Discover brand-specific savings selected just for you.

3. Bajaj offers - Unlock exclusive Bajaj Finance deals on popular products—available only to our customers. More rewards, more value.

4. Scheme offers - Take advantage of time-sensitive offers on select EMI schemes. Get extra benefits after paying just 3 EMIs—visible during EMI selection at checkout.
 

Calculate your extra savings today!