Right filter.   Right size.   Right count.   Right away.
The Right Filter, Right Away! (612) 721-4000

How Air Filters Work


Air filters are probably just one of those things you take for granted. It’s a piece of equipment that you change or clean regularly, and that’s it, right? But have you ever given thought to exactly how air filters work?

An air filter is a dirt trap. Floating through the air at any given moments are many tiny particles of dust, dirt, pet dander, mold, pollen, and other airborne particles. When you turn on your air conditioner or heating system, air is pulled into the system from the outside. The air moves through a filter, and the filter material catches and traps the particles.

But not all particles are the same size or shape. Some are big, some are small. That’s why it’s important to find air filters that effectively screen out the particles in question base on their size. MERV ratings can help you determine if the filters you’re considering are adequate to screen out the particular airborne particles you need to remove.

Filters don’t just keep the air safe to breathe. They also keep your system cleaner, and prevent it from breaking down due to overwork and overheating. Air filters are an important component of your heating and cooling system, and one you shouldn’t overlook.

When you need filters, come to Twin City Filter Service. For over 70 years, we’ve provided excellent service and great prices to our customers.  Twin City Filter Service stocks a wide range of industrial filters, intake panels, and low, mid and high efficiency filters. We keep many sizes in stock for our regular customers and can order out of stock items to be delivered quickly. If you don’t see what you need, ask us – we’re happy to help.

Twin City Filter Service is a Twin Cities filter and belt company offering great prices, friendly service, and fast shipping. We ship same day to customers coast to coast, and offer next day delivery in Minnesota, Wisconsin, Iowa, South Dakota and North Dakota. Twin City Filter Service may be reached at (612) 721-4000.

About Us

For over 70 years Twin City Filter has been a family business providing both filter service and filter sales. We began serving the Greater Twin Cities Metro Area and grew into a coast to coast, border to border business.

Speed, Accuracy, Quality and Value

We provide filters, custom filters and service to contractors, office complexes, condos, business parks, colleges, and other industrial, commercial and residential developments.