A ductless range hood, also known as an unvented range hood, features a fan but no duct. Instead, it cleans the air with a variety of filters before recirculating it back into the kitchen (these models are sometimes called recirculating hoods).

This kind of range hood works by sucking in air, filtering it, and then blowing it back into the room. Activated carbon or charcoal in the filter helps to remove odors and smoke particles from the air, which may then be recirculated safely throughout the kitchen. 

As a result, ductless range hood can be installed almost anywhere. You don't have to put them only where there is a duct because they don't need to vent to the outside and are ductless.

Now we can tell how important the filter is to a ductless range hood. It is the part that cleans and purifies grease, dirt, and other particles, causing the range hood does not need to be ducted. In the market, you can find a range of filters out there  for ductless range hood. I will introduce 3 main types of range hood filters.

The 3 Main Types of Range Hood Filters And How they work

Stainless Steel Baffle Filter

Baffle filters made of stainless steel are designed for heavy-duty cooking, although they may be found in any high-quality, ducted type. Grease is trapped in these filters, which aid the exhaust fan in sucking out smoke, steam, and smells. Dripping grease is caught in the grooves of the filters, preventing it from landing onto your stove, cabinet, or food.

It's easy to clean with a little soap and water thanks to the stainless steel structure. You can even run them through the dishwasher with your next cycle of dishes if they're dishwasher safe. The material is also extremely robust, however for optimal results, you should change them according to the manufacturer's recommendations.

Aluminum Mesh Filter

Mesh filters are next on the list. Instead of stainless steel, these are commonly composed of aluminum. When air passes through the filter, it separates grease from cooking smells. They also aid in the purification of the air and the removal of pollutants. For added air-purification power, some range hood models combine aluminum mesh filters with charcoal filters.

For ordinary cooking and medium use, aluminum mesh filters are ideal.

Charcoal Filters

With ductless range hoods, charcoal filters are common. They're frequently utilized to convert ducted models to ductless variants. Carbon-based material is used to make these filters. This enables them to filter pollutants and neutralize any scents generated during the cooking process.

These filters can't usually be cleaned and must be replaced on a regular basis. They work well with medium or everyday cooking when teamed with a good ductless model. If you frequently stir fry or utilize high heat levels, a model with baffle filters may be more beneficial.

There is no certain answer for which type of filter is the best for ductless range hood, it all boils down to your personal preferences and requirements when it comes to cooking. Home cooks who create light meals and don't have ducting in their kitchens will benefit from charcoal filters. Stainless steel baffle filters are likely to be preferred by stir fry enthusiasts and those who want to test out new cuisines. You may choose a model with aluminum mesh filters if you do a little of both. Finally, choose a range hood that best fits your kitchen's architecture (i.e., ducting or no ductwork), layout, size, and cooking habits. You may then compare the many types of filters that each model comes with to limit down your choices.

How to Install a Ductless Range Hood?

The installation of ductless range hood is different from ducted range hood, you will be happy to know there are fewer steps to follow when it comes to set up a ductless range hood in your kitchen.

Before you start the installation, you will need to prepare the following tools:

• Safety gloves
• Safety goggles
• Pencil
• Philips screwdriver
• Flathead screwdriver
• Needle nose pliers
• Electric drill
• Level
• Hammer
• Measuring tape
• Tape
• Utility knife
• Adjustable wrench

Installation Drilling and Lining

Start by drawing a vertical line up to the ceiling or as high as you can on the supporting wall. The center of the area where the range hood will be installed should be marked with this line.

Then, at a minimum of 24 inches above your cooking surface, draw a horizontal line at a maximum of 30 inches. Keep a close eye on this set of numbers. You don't want the range hood to be too low to cause a fire or too high to prevent the appliance from functioning properly.

Chimney Mounting Bracket

The chimney mounting bracket can now be hung on the wall. Align the center (notch) with the vertical reference line and place it about one inch from the ceiling or higher limit.

Mount the Hood

Install the drywall anchors and the two hood body mounting screws into the wall along the line 11-4/5 inches above the horizontal line. Ensure that they are perpendicular to the horizontal line.

Hang the Hood Body

Then, using the screws that are fixed on the wall, hang the hood body. To fix the hood body to the wall, tighten the secures. Finally, attach the hood body (A) in place with two additional hood body mounting screws (AA) in the auxiliary mounting holes.

Install the Bottom and Top of the Chimney

Slide the chimney bottom down, partially outside the chimney top. Place the chimney bottom into the recessed area of the hood body top with care. Ensure that the chimney mounting bracket is firmly secured to the wall.

Secure the Chimney

Raise the top of the chimney to the level of the bottom of the chimney. Using chimney mounting bracket screws from both sides, secure the chimney top to the chimney mounting bracket.

Convert to Ductless

To make the range hood ductless, install the charcoal filters. Remove the filters on the outside. Apply the charcoal filters to the hood's suction unit. To snap them into place, make sure they're centered and turned 90 degrees. Remove the outer filters and replace them.

After you've completed installing the range hood, ensure sure it works properly by turning it on. Replace your filters at least once every three months for best performance. It is not recommended that they be washed or reused.