This guide covers the five Camfil pleated furnace filters we carry in standard sizes. Answer two questions and you will know which one to look at.
Filter from another brand? Camfil replaces it.
If the size printed on the frame of your current filter is the same, for example 16x25x1, the Camfil filter slides into the same slot, whatever brand you have now. No need to buy the same brand again. Not sure? Ask us or call (888) 315-0105.
1. What matters most to you?
BETTER FILTRATION
2. How far do you want to go?
EVERYDAY FILTRATION
Camfil Aeropleat III
MERV 8
Captures dust, lint, pollen and mould spores. The simplest of the five: it does the job if dust is your main concern and you change your filter on a schedule.
FiltrationMERV 8
Filter lifestandard
Furnace fan effortlow
Price$
BETTER FILTRATION
Camfil AP-Eleven
MERV 11
Also captures fine dust, soot and some smoke. In the 1-inch size, it is the easiest of the five on your furnace fan.
FiltrationMERV 11
Filter lifelonger
Furnace fan effortlowest
Price$$
HIGH FILTRATION
Camfil AP-Thirteen SC
MERV 13
Also captures about half of the smallest particles, such as smoke. The finest of the five, and the one that asks the most of your fan: read the note below.
FiltrationMERV 13
Filter lifestandard
Furnace fan efforthigher
Price$$$
Before choosing MERV 13
A MERV 13 filter is more restrictive than a MERV 8, 9 or 11. Some heating and cooling systems take it without any trouble, others don't. If you are not sure yours can, check your system manufacturer's recommendations or ask a heating and cooling technician before you order.
CHANGE YOUR FILTER LESS OFTEN
2. How long?
LONG LIFE
Camfil Farr 30/30
MERV 8
The same filtration as the Aeropleat III: dust, lint, pollen and mould spores. More pleats, so it fills up more slowly and you change it less often.
FiltrationMERV 8
Filter lifelonger
Furnace fan effortlow
Price$$
EXTRA LONG LIFE
Camfil 30/30 Dual 9
MERV 9
Two layers of media and one MERV level above the 30/30, so a bit more fine dust. For people who want to change their filter as rarely as possible.
FiltrationMERV 9
Filter lifelongest
Furnace fan effortlow
Price$$
At a glance
The bars compare the five filters with each other, in the same size. MERV ratings are Camfil's, under ASHRAE Standard 52.2, and so are the air resistance ratings.
Will it fit?
Yes, if the size printed on the frame of your current filter is the same, for example 16x25x1. The last number is the thickness: 1, 2 or 4 inches. That printed size is rounded: the filter itself is slightly smaller, which is what lets it slide into the slot.
For peace of mind, measure your current filter (length, width and thickness) and compare it with the exact size listed on the product page. Not every filter is made in every size: the size list shows what we carry.
Your questions, answered
What does MERV mean?+
It is the scale that tells you how small the particles a filter captures are. The higher the number, the smaller the particles. Read the full explanation.
Why are there two MERV 8 filters?+
They filter at the same level but are not built the same. The Farr 30/30 has more pleats, so more media: it fills up more slowly and you change it less often. The Aeropleat III is the standard version.
Is the MERV 9 better than the MERV 11?+
Not for filtration. The Dual 9 is chosen for how long it lasts. For finer filtration, the AP-Eleven, MERV 11, captures more of the fine particles.
Can a higher MERV harm my system?+
Up to MERV 11, Camfil rates these filters at a similar starting air resistance, and the AP-Eleven is the lowest of the five in 1 inch. The MERV 13 is the one that asks more of your fan: read the note on MERV 13 above.
When should I change it?+
There is no fixed interval. It depends on your home: pets, renovations, a dusty neighbourhood, and whether the fan runs all the time. When your filter looks grey and loaded with dust, change it. A long-life filter simply takes longer to get there.
How do I remember to change it?+
Write the date on the frame of the new filter when you install it. Next time you check, you will know how long a filter lasts in your home. Then set a reminder on your phone or calendar for the next change. For example, if your filter looks grey after about three months, set a reminder for three months after you put in the new one.
What if I ordered the wrong filter?+
You can return it within 35 days of receiving your order, as long as the filters are new, unused and in their original packaging. Email us your order number and the reason first, and we will send you a return authorization. There is no restocking fee. Return shipping is paid by you, unless the item is defective or we sent the wrong one. Read the full return policy.
Still not sure? We're here to help.
Tell us what is printed on your filter, or the measurements you took, and we will help you find the right Camfil filter for your system.