The frequency of MERV 8 furnace filter changes will highly depend on what is inside your home, where you are located and various other factors. We wrote a Filter Change Frequency Guide which will help you decide when it is time to change your furnace filter.

A MERV 8 furnace filter is able to trap: common dust, debris, pollen, mold spores, hair spray, fabric protector and cement dust.

If you need help finding your exact filter on PureFilters.ca and prefer to speak to someone, please give us a call at 1-888-979-4284 or email us at support@purefilters.ca. We are available Monday to Friday from 9AM to 5PM Eastern Standard Time.

It's important to know the difference between nominal size and actual or exact size. We wrote a Guide for Furnace Filter Sizes, if you are not sure what the size of your MERV 8 filter is, we recommend checking it out.

If you still cannot find your furnace filter listed on our store, you can always request a custom size filter. Custom size filters can take up to 15 business days to deliver and all custom size filter sales are final (no refunds/exchanges). In order to request a custom size filter and receive a quote for your order, please click on the link below.

MERV 8 filtration is capable of capturing particles between 3.0 micros and 10.0 with 90% efficiency. A MERV 8 furnace filter is perfect for the average household, it is far superior than fibreglass or synthetic panel filters.

If you are unsure of which MERV rating is suitable for your home, be sure to check out our MERV Rating Guide. You can also see a quick comparison chart here: