Guide to Replacing a Range Hood Filter: What You Need to Know

Ducted filters offer superior ventilation by removing smoke, odors and grease directly out of your house. This eliminates the need for constant odor control within the kitchen itself. Since the pollutants are expelled entirely, ducted filters require less frequent cleaning or replacement compared to ductless filters. Ducted filters generally come with air filters and don’t need any additional filters like the duct-free ones. They do, however, require ductwork to be present in a kitchen.

Before you buy replacement filters, check your hood's model number. Read all model details carefully. Filters are often made for exact models or series; make sure the one you buy properly fits the one you have in your kitchen.

Below are the main types of air filters and a description of how each one functions.

Charcoal filters: These filters are also known as carbon filters or activated charcoal filters. They’re great for getting rid of odors and smoke from your kitchen, improving air quality. Charcoal filters are only compatible with ductless, or recirculating, range hoods. Unlike some other filter types, charcoal filters cannot be washed and should be replaced every three to six months depending on use. 

Mesh filters: These grease filters are made to trap grease and oil from cooking fumes. They stop grease from building up and also help reduce fire accidents. Perfect for long-term use, they’re made of aluminum or stainless steel and are often washable. Some are dishwasher-safe while others must be hand-washed. Depending on how regularly you cook, grease filters should be cleaned every one to three months. 

Baffle filters: Another type of grease filter, baffle filters are made from stainless steel or aluminum panels that have curved baffles. They work by pushing air through the baffles to separate grease and trap it in place. Used in commercial kitchens or in homes with commercial-grade kitchens, they’re considered a high-end filter option and are known for their durability. Baffle filters should be cleaned every one to three months. 

Choose a material that fits your needs. Aluminum and stainless steel filters last long and can be reused. Charcoal filters, on the other hand, deal with odor removal but need to be replaced regularly.

• Aluminum mesh filters: These filters are ideal for kitchens with frequent high-grease cooking (frying, grilling, sauteed). They are built to last and are easy to clean. They will need to be cleaned every 2–3 months. They are versatile and can be used with a range of hood models, both ducted and ductless. They are eco-friendly, last for a longer time and are cost-effective.
• Stainless steel filters: These filters are ideal for bigger kitchens. They are washable and can be used many times. However, you need to clean these every 1–3 months.
• Plastic filters: Plastic filters are perfect for range hoods. They are more reasonable, last longer and are very easy to install. This material can be custom-made and used with other filter types. You'll need to clean it every 1–2 months.

You can find range hood filters in many sizes to fit different models. For example, you can go for 11 inches by 17 inches in smaller hoods. But, for larger hoods, you need 16.5 inches by 20.5 inches, as they are more powerful. To make sure your filter is a perfect fit, follow these steps:

• Use a measuring tape to check your existing filter. Get the exact length, width and thickness.
• Filters can vary in size as well as in material and design. Choose the one that matches the specifications of your range hood.
• Check out the range hood's manual for exact sizing. Get the one that is snug and the best fit.

Cross-check the installation process of the replacement filters. Some of the filters require simple insertion or sliding into place, while others may involve more complex installation procedures. Choose the one that aligns with your comfort level for installation.